PIPE FITTINGS AND ASSEMBLIES

Abstract

A pipe fitting includes a tubular member having first and second sockets, each configured to receive an end of a pipe section such that a gap exists between an outer surface of each pipe section and an inner surface of the sockets. A pair of ports extend through the tubular member in each socket and are in fluid communication with each gap. Each socket may include one or more annular sealing members therein.

Claims

1. A pipe fitting, comprising: a tubular member comprising first and second sockets, wherein the first socket is configured to receive an end of a first pipe section therein such that a first gap exists between an outer surface of the first pipe section and an inner surface of the first socket, and wherein the second socket is configured to receive an end of a second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket; a first pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the first gap, wherein the first gap is configured to receive a bonding agent via one of the first pair of ports; and a second pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the second gap, wherein the second gap is configured to receive the bonding agent via one of the second pair of ports.

2. The pipe fitting of claim 1, wherein the first socket comprises a first annular sealing member that is configured to seal an open end of the first gap, and wherein the second socket comprises a second annular sealing member that is configured to seal an open end of the second gap.

3. The pipe fitting of claim 2, wherein the first socket comprises a first annular channel formed therein, wherein the first annular sealing member is positioned within the first annular channel, wherein the second socket comprises a second annular channel formed therein, and wherein the second annular sealing member is positioned within the second annular channel.

4. The pipe fitting of claim 1, wherein the tubular member comprises an annular pipe stop extending from an inner surface of the tubular member that is configured to matingly engage with the end of the first pipe section and to matingly engage with the end of the second pipe section, wherein the first socket comprises a first annular sealing member therein that abuts the pipe stop, and wherein the second socket comprises a second annular sealing member therein that abuts the pipe stop, wherein the first and second annular sealing members seal a joint between the end of the first pipe section and the end of the second pipe section when the first pipe section is received in the first socket and the second pipe section is received in the second socket.

5. The pipe fitting of claim 4, wherein the first socket comprises a first annular channel formed in the inner surface thereof adjacent the pipe stop, wherein the first annular sealing member is positioned at least partially within the first annular channel, wherein the second socket comprises a second annular channel formed in the inner surface thereof adjacent the pipe stop, and wherein the second annular sealing member is positioned at least partially within the second annular channel.

6. The pipe fitting of claim 1, wherein the tubular member comprises at least one annular sealing member at a medial location thereof, wherein the at least one annular sealing member is configured to seal a joint between the end of the first pipe section and the end of the second pipe section when the first pipe section is received in the first socket and the second pipe section is received in the second socket.

7. The pipe fitting of claim 6, wherein the at least one annular sealing member comprises two annular sealing members.

8. The pipe fitting of claim 6, wherein the tubular member comprises at least one annular channel formed in the inner surface thereof at the medial location, and wherein the at least one annular sealing member is positioned at least partially within the at least one annular channel.

9. The pipe fitting of claim 1, wherein the first and second sockets have colinear longitudinal axes.

10. The pipe fitting of claim 1, wherein the first and second sockets have non-colinear longitudinal axes.

11. The pipe fitting of claim 1, further comprising: a third socket configured to receive an end of a third pipe section therein such that a third gap exists between an outer surface of the third pipe section and an inner surface of the third socket; and a third pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the third gap, wherein the third gap is configured to receive the bonding agent via one of the third pair of ports.

12. The pipe fitting of claim 11, wherein the pipe fitting comprises a T-shaped fitting or a Y-shaped fitting.

13. A pipe fitting, comprising: a tubular member comprising first and second sockets, wherein the first socket is configured to receive an end of a first pipe section therein such that a first gap exists between an outer surface of the first pipe section and an inner surface of the first socket, wherein the second socket is configured to receive an end of a second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket, wherein the first socket comprises a first annular sealing member that is configured to seal an open end of the first gap, and wherein the second socket comprises a second annular sealing member that is configured to seal an open end of the second gap; a first pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the first gap, wherein the first gap is configured to receive a bonding agent via one of the first pair of ports; a second pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the second gap, wherein the second gap is configured to receive the bonding agent via one of the second pair of ports; an annular pipe stop extending from an inner surface of the tubular member that is configured to matingly engage with the end of the first pipe section and to matingly engage with the end of the second pipe section, wherein the first socket comprises a third annular sealing member therein that abuts the pipe stop, and wherein the second socket comprises a fourth annular sealing member therein that abuts the pipe stop.

14. The pipe fitting of claim 13, wherein the first socket comprises a first annular channel formed in the inner surface thereof, wherein the first annular sealing member is positioned at least partially within the first annular channel, wherein the second socket comprises a second annular channel formed in the inner surface thereof, and wherein the second annular sealing member is positioned at least partially within the second annular channel.

15. The pipe fitting of claim 13, wherein the first socket comprises a first annular channel formed in the inner surface thereof adjacent the pipe stop, wherein the third annular sealing member is positioned at least partially within the first annular channel, wherein the second socket comprises a second annular channel formed in the inner surface thereof adjacent the pipe stop, and wherein the fourth annular sealing member is positioned at least partially within the second annular channel.

16. A pipe fitting, comprising: a tubular member comprising first and second sockets, wherein the first socket is configured to receive an end of a first pipe section therein such that a first gap exists between an outer surface of the first pipe section and an inner surface of the first socket, wherein the second socket is configured to receive an end of a second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket, and wherein the first and second sockets have colinear longitudinal axes; a first pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the first gap, wherein the first gap is configured to receive a bonding agent via one of the first pair of ports; a second pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the second gap, wherein the second gap is configured to receive the bonding agent via one of the second pair of ports; and at least one annular sealing member within the tubular member, wherein the at least one annular sealing member is configured to seal a joint between the end of the first pipe section and the end of the second pipe section when the first pipe section is received in the first socket and the second pipe section is received in the second socket.

17. The pipe fitting of claim 16, wherein the at least one annular sealing member comprises two annular sealing members.

18. The pipe fitting of claim 16, wherein the tubular member comprises at least one annular channel formed in the inner surface thereof at the medial location, and wherein the at least one annular sealing member is positioned at least partially within the at least one annular channel.

19. A pipe joint assembly, comprising: a first pipe section comprising an end with a first groove formed therein; a second pipe section comprising an end with a second groove formed therein; a tubular member comprising first and second sockets, wherein the first socket is configured to receive the end of the first pipe section therein such that a first gap exists between an outer surface of the first pipe section and an inner surface of the first socket, and wherein the second socket is configured to receive the end of the second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket; and at least one annular sealing member within the tubular member, wherein the at least one annular sealing member is configured to be at least partially forced into the first and second grooves and seal a joint between the end of the first pipe section and the end of the second pipe section when the first pipe section is received in the first socket and the second pipe section is received in the second socket.

20. The pipe joint assembly of claim 19, further comprising: a first pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the first gap, wherein the first gap is configured to receive a bonding agent via one of the first pair of ports; and a second pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the second gap, wherein the second gap is configured to receive the bonding agent via one of the second pair of ports.

21. The pipe joint assembly of claim 19, wherein the at least one annular sealing member comprises two annular sealing members.

22. The pipe joint assembly of claim 19, wherein the tubular member comprises at least one annular channel formed in the inner surface thereof, and wherein the at least one annular sealing member is positioned at least partially within the at least one annular channel.

23. A pipe joint assembly, comprising: a first pipe section comprising an end with a first groove formed therein; a second pipe section comprising an end with a second groove formed therein; a tubular member comprising first and second sockets, wherein the first socket is configured to receive the end of the first pipe section therein such that a first gap exists between an outer surface of the first pipe section and an inner surface of the first socket, and wherein the second socket is configured to receive the end of the second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket; and an annular pipe stop extending from an inner surface of the tubular member that is configured to matingly engage with the end of the first pipe section and to matingly engage with the end of the second pipe section, wherein the first socket comprises a first annular sealing member therein that abuts the pipe stop, and wherein the second socket comprises a second annular sealing member therein that abuts the pipe stop, wherein the first and second annular sealing members are configured to be at least partially forced into the first and second grooves respectively and seal a joint between the end of the first pipe section and the end of the second pipe section when the first pipe section is received in the first socket and the second pipe section is received in the second socket.

24. The pipe joint assembly of claim 23, further comprising: a first pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the first gap, wherein the first gap is configured to receive a bonding agent via one of the first pair of ports; and a second pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the second gap, wherein the second gap is configured to receive the bonding agent via one of the second pair of ports.

25. The pipe joint assembly of claim 23, wherein the pipe stop comprises opposing third and fourth grooves formed therein, wherein the first annular sealing member is configured to be at least partially forced into the first and third grooves and the second annular sealing member is configured to be at least partially forced into the second and fourth grooves when the first pipe section is received in the first socket and the second pipe section is received in the second socket.

26. The pipe joint assembly of claim 23, wherein the first socket comprises a first annular channel formed in the inner surface thereof, wherein the first annular sealing member is positioned at least partially within the first annular channel, wherein the second socket comprises a second annular channel formed in the inner surface thereof, and wherein the second annular sealing member is positioned at least partially within the second annular channel.

27. A pipe fitting, comprising: a tubular member comprising first and second sockets, wherein the first socket is configured to receive an end of a first pipe section therein such that a first gap exists between an outer surface of the first pipe section and an inner surface of the first socket, and wherein the second socket is configured to receive an end of a second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket; an annular pipe stop extending from an inner surface of the tubular member that is configured to matingly engage with the end of the first pipe section and to matingly engage with the end of the second pipe section; a first annular sealing member within the first socket; and a second annular sealing member within the second socket. wherein the pipe stop comprises opposing first and second grooves formed therein, wherein the first annular sealing member is configured to be at least partially forced into the first groove when the first pipe section is received in the first socket and the second annular sealing member is configured to be at least partially forced into the second groove when the second pipe section is received in the second socket.

28. The pipe fitting of claim 27, further comprising: a first pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the first gap, wherein the first gap is configured to receive a bonding agent via one of the first pair of ports; and a second pair of ports extending through the tubular member in circumferentially spaced-apart relationship and in fluid communication with the second gap, wherein the second gap is configured to receive the bonding agent via one of the second pair of ports.

29. The pipe fitting of claim 27, wherein the first socket comprises a first annular channel formed in the inner surface thereof adjacent the pipe stop, wherein the first annular sealing member is positioned at least partially within the first annular channel, wherein the second socket comprises a second annular channel formed in the inner surface thereof adjacent the pipe stop, and wherein the second annular sealing member is positioned at least partially within the second annular channel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings, which form a part of the specification, illustrate some exemplary embodiments. The drawings and description together serve to fully explain the exemplary embodiments.

[0054] FIG. 1 is a perspective view of a pipe fitting that includes a tubular member having a socket, a centering device within the socket, and a removable clamp, according to some embodiments of the present invention. In FIG. 1, a portion of a male end of a pipe section is inserted into the socket and is being held in place via the clamp so that a bonding agent can be injected into a gap between the pipe section and the socket to join the pipe section to the pipe fitting.

[0055] FIG. 2 is a cross-sectional view of the pipe fitting of FIG. 1 taken along lines 2-2 and illustrating a centering ring being utilized as the centering device, according to some embodiments of the present invention.

[0056] FIG. 3 is a cross-sectional view of the pipe fitting of FIG. 1 taken along lines 2-2 and illustrating circumferentially spaced-apart raised members extending outwardly from the inner surface of the socket which serve as the centering device, according to some embodiments of the present invention.

[0057] FIG. 4 is a perspective view of a pipe joint centering ring, according to some embodiments of the present invention.

[0058] FIG. 5 is a plan view of a pipe joint centering ring, according to some embodiments of the present invention.

[0059] FIG. 6 illustrates the centering ring of FIG. 4 secured within a socket of a pipe fitting, according to some embodiments of the present invention.

[0060] FIG. 7 is a perspective view of a removable clamp that can be utilized with the pipe fittings of FIGS. 1 and 2, according to some embodiments of the present invention.

[0061] FIG. 8 is a perspective view of one of the arcuate segments of the removable clamp of FIG. 7.

[0062] FIG. 9 is a plan view of one of the arcuate segments of the removable clamp of FIG. 7 and illustrating the length of a sealing member relative to a length of the arcuate segment.

[0063] FIGS. 10 and 11 are partial views of the pipe fitting of FIG. 2 and illustrate relative movement between the first and second members of an arcuate segment of the removable clamp as the clamp is tightened.

[0064] FIGS. 12 and 13 are partial views of the pipe fitting of FIG. 3 and illustrate relative movement between the first and second members of an arcuate segment of the removable clamp as the clamp is tightened.

[0065] FIG. 14 is a side cut-away view of a pipe fitting with a reinforcement band positioned therearound, according to some embodiments of the present invention.

[0066] FIG. 15 is a perspective view of a pipe fitting with a reinforcement band positioned therearound, according to some embodiments of the present invention.

[0067] FIG. 16 is an end view of the pipe fitting of FIG. 15 illustrating the reinforcement band.

[0068] FIG. 17 is a side cut-away view of a pipe fitting with a pipe stop having an increased radial length, according to some embodiments of the present invention.

[0069] FIG. 18A is a side cut-away view of a pipe fitting, according to some embodiments of the present invention.

[0070] FIG. 18B is a perspective view of the pipe fitting of FIG. 18A illustrating a portion of a male end of a pipe section inserted into one of the sockets.

[0071] FIG. 18C illustrates the pipe fitting of FIG. 18A with a male end of a pipe section inserted into each of the sockets of the pipe fitting.

[0072] FIG. 19A is a side cut-away view of a pipe fitting having an annular sealing member within each socket adjacent the pipe stop, according to some embodiments of the present invention.

[0073] FIG. 19B illustrates the pipe fitting of FIG. 19A with a male end of a pipe section inserted into each of the sockets of the pipe fitting.

[0074] FIG. 19C illustrates the pipe fitting of FIG. 19A with each of the annular sealing members within a respective annular groove in the tubular member.

[0075] FIG. 20A is a side cut-away view of a pipe fitting having an annular sealing member within each socket adjacent the open free end thereof, according to some embodiments of the present invention.

[0076] FIG. 20B illustrates the pipe fitting of FIG. 20A with a male end of a pipe section inserted into each of the sockets of the pipe fitting.

[0077] FIG. 20C illustrates the pipe fitting of FIG. 20A with each of the annular sealing members within a respective annular groove in the tubular member.

[0078] FIG. 21A is a side cut-away view of a pipe fitting having an annular sealing member within each socket adjacent the open free end thereof, and having an annular sealing member within each socket adjacent the open free end thereof, according to some embodiments of the present invention.

[0079] FIG. 21B illustrates the pipe fitting of FIG. 21A with a male end of a pipe section inserted into each of the sockets of the pipe fitting.

[0080] FIG. 21C illustrates the pipe fitting of FIG. 21A with each of the annular sealing members within a respective annular groove in the tubular member.

[0081] FIG. 22A is a side cut-away view of a pipe fitting having an annular sealing member within the tubular member at a medial location between each socket, according to some embodiments of the present invention.

[0082] FIG. 22B illustrates the pipe fitting of FIG. 22A with a male end of a pipe section inserted into each of the sockets of the pipe fitting.

[0083] FIG. 22C illustrates the pipe fitting of FIG. 22A with the annular sealing member within a respective annular groove in the tubular member.

[0084] FIG. 23A is a side cut-away view of a pipe fitting having two annular sealing members within the tubular member at a medial location between each socket, according to some embodiments of the present invention.

[0085] FIG. 23B illustrates the pipe fitting of FIG. 23A with a male end of a pipe section inserted into each of the sockets of the pipe fitting.

[0086] FIG. 23C illustrates the pipe fitting of FIG. 23A with the annular sealing members within respective annular grooves in the tubular member.

[0087] FIGS. 24A-24E are partial views of a pipe joint assembly, according to some embodiments of the present invention.

[0088] FIG. 24F is partial view of a pipe fitting, according to some embodiments of the present invention.

[0089] FIGS. 25A-25D are perspective views of various configurations that a pipe fitting according to embodiments of the present invention can have.

DETAILED DESCRIPTION OF THE INVENTION

[0090] The present invention will now be described more fully hereinafter with reference to the accompanying figures, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like numbers refer to like elements throughout. In the figures, certain components or features may be exaggerated for clarity, and broken lines may illustrate optional features or elements unless specified otherwise. In addition, the sequence of operations (or steps) is not limited to the order presented in the figures and/or claims unless specifically indicated otherwise. Features described with respect to one figure or embodiment can be associated with another embodiment or figure although not specifically described or shown as such.

[0091] It will be understood that when a feature or element is referred to as being on another feature or element, it can be directly on the other feature or element or intervening features and/or elements may also be present. In contrast, when a feature or element is referred to as being directly on another feature or element, there are no intervening features or elements present. It will also be understood that, when a feature or element is referred to as being connected, attached or coupled to another feature or element, it can be directly connected, attached or coupled to the other feature or element or intervening features or elements may be present. In contrast, when a feature or element is referred to as being directly connected, directly attached or directly coupled to another feature or element, there are no intervening features or elements present. Although described or shown with respect to one embodiment, the features and elements so described or shown can apply to other embodiments.

[0092] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms a, an and the are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms comprises and/or comprising, when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. As used herein, the term and/or includes any and all combinations of one or more of the associated listed items and may be abbreviated as /.

[0093] As used herein, phrases such as between X and Y and between about X and Y should be interpreted to include X and Y. As used herein, phrases such as between about X and Y mean between about X and about Y. As used herein, phrases such as from about X to Y mean from about X to about Y.

[0094] Spatially relative terms, such as under, below, lower, over, upper and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of a device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is inverted, elements described as under or beneath other elements or features would then be oriented over the other elements or features. Thus, the exemplary term under can encompass both an orientation of over and under. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Similarly, the terms upwardly, downwardly, vertical, horizontal and the like are used herein for the purpose of explanation only unless specifically indicated otherwise.

[0095] It will be understood that although the terms first and second are used herein to describe various features or elements, these features or elements should not be limited by these terms. These terms are only used to distinguish one feature or element from another feature or element. Thus, a first feature or element discussed below could be termed a second feature or element, and similarly, a second feature or element discussed below could be termed a first feature or element without departing from the teachings of the present invention.

[0096] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the specification and relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

[0097] The term about, as used herein with respect to a value or number, means that the value or number can vary more or less, for example by +/?20%, +/?10%, +/?5%, +/?1%, +/?0.5%, +/?0.1%, etc.

[0098] The term frusto-conical, as used herein, means having the shape of a cone with the narrow end, or tip, removed.

[0099] As used herein, the terms comprise, comprising, comprises, include, including, includes, have, has, having, or variants thereof are open-ended, and include one or more stated features, integers, elements, steps, components or functions but does not preclude the presence or addition of one or more other features, integers, elements, steps, components, functions or groups thereof. Furthermore, as used herein, the common abbreviation e.g., which derives from the Latin phrase exempli gratia, may be used to introduce or specify a general example or examples of a previously mentioned item, and is not intended to be limiting of such item. The common abbreviation i.e., which derives from the Latin phrase id est, may be used to specify a particular item from a more general recitation.

[0100] Referring now to FIGS. 1-3, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a socket 14 configured to receive an end 16a of a pipe section 16 therein. The pipe fitting 10 can be shaped as a straight union, an elbow, a T, a Y, a cross or any other desired geometry. The socket 14 has an internal diameter Ds that is larger than the outer diameter Dp of the pipe section such that a gap G exists between an outer surface of the pipe section 16 and an inner surface 14a of the socket 14 when the pipe section 16 is centered within the socket 14. The socket 14 includes an open free end 18 through which the end 16a of the pipe section 16 is inserted and a pipe stop 20 that is configured to matingly engage with the end 16a of the pipe section. In the illustrated embodiment, the pipe stop 20 is an annular member that extends from the inner surface 14a of the socket 14.

[0101] In some embodiments of the present invention, prior to insertion within the socket, material is removed from the pipe end 16a (e.g., via a hand tool or lathe, etc.) to create a profiled end 17 that matingly engages with the pipe stop 20. As illustrated, the profiled end 17 includes a tapered portion 17a and an engagement portion 17b. The tapered portion 17a is inserted into the opening of the annular pipe stop 20 and the engagement portion 17b is configured to abut against the pipe stop 20 in face-to-face relationship. The profiled end 17 acts as a locating pin at the pipe stop 20 and facilitates insertion of the pipe end 16a fully within the socket 14. The tapered portion 17a of the pipe end 16a is angled such that when the pipe section 16 is fully bottomed against the pipe stop 20, the pipe section 16 cannot move side to side (radially) in any direction.

[0102] A pair of ports 22 extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed. A bonding agent is injected into the gap G via one of these ports 22, as will be described below.

[0103] The socket 14 also includes a centering device that is configured to maintain a coaxial relationship between the pipe section 16 and the socket 14 and such that the gap G is substantially circumferentially uniform. This allows a bonding agent (BA, FIGS. 11 and 13) injected into the gap G to have a substantially circumferentially uniform thickness, which results in a strong, uniform bond between the pipe section 16 and the fitting 12.

[0104] In the embodiment illustrated in FIG. 2, the centering device is a centering ring 30 that is positioned within the socket 14. In addition to further aligning the pipe section 16 in the socket 14, the centering ring 30 also prevents the pipe section from being pulled out of the socket 14. As will be described below, the centering ring 30 has teeth which become embedded into the inner surface 14a of the socket 14 and outer surface 16a of the pipe section 16 to prevent pipe pull-out once inserted into the socket 14. In addition to aligning the pipe section 16 in the center of the socket 14 and preventing pipe pull-out, the centering ring 30 also provides some resistance to pipe rotation within the socket 14.

[0105] In the embodiment illustrated in FIG. 3, the centering device comprises a plurality of raised members or bumps 40 extending outwardly from the inner surface 14a of the socket 14 in circumferentially spaced-apart relationship. For example, in some embodiments, the bumps 40 are substantially equidistantly spaced-apart. For example, in some embodiments, there are three bumps spaced-apart by 120?. The bumps 40 may be a molded feature of the socket 14. Although illustrated as bumps, the raised members 40 may have various shapes and configurations and there may be various numbers of raised members 40 (typically at least three).

[0106] Referring to FIG. 4, a centering ring 30, according to some embodiments of the present invention, is illustrated. The illustrated centering ring includes an annular member 32 that has opposite inner and outer peripheral edges 32a, 32b. The illustrated centering ring 30 has a frusto-conical shape. The illustrated centering ring 30 is configured to be secured within the socket 14 of the tubular member 12 (FIG. 2) or the socket of other types of pipe fittings/connectors.

[0107] A first plurality of inwardly projecting gripping teeth 34 are on the inner peripheral edge 32a in circumferentially spaced-apart relationship. A second plurality of outwardly projecting gripping teeth 36 are on the outer peripheral edge 32b in circumferentially spaced-apart relationship. Typically, adjacent ones of the first plurality of gripping teeth 34 are spaced-apart between about one-quarter inch and about one inch (0.25-1.0). Similarly, adjacent ones of the second plurality of gripping teeth 36 typically are spaced-apart between about one-quarter inch and about one inch (0.25-1.0). However, the first plurality of gripping teeth 34 may be spaced apart by various other distances, and the second plurality of gripping teeth 36 may be spaced apart by various other distances.

[0108] In the illustrated embodiment of FIG. 4, the first and second plurality of teeth 34, 36 have a triangular shape and are substantially the same size. However, the first and/or second plurality of teeth 34, 36 may have various other shapes. In addition, each one of the first plurality of gripping teeth 34 are substantially adjacent to a respective one of the second plurality of gripping teeth 36. However, in other embodiments, the first and second plurality of gripping teeth 34, 36 may be staggered relative to each other.

[0109] The first plurality of gripping teeth 34 are configured to grip the outer surface 16a of a pipe section 16 inserted within the socket 14 of the pipe fitting 10. In addition, the second plurality of gripping teeth 36 are configured to grip a portion of the inner surface 14a of the socket 14, as illustrated in FIG. 6.

[0110] Referring to FIG. 5, a pipe joint centering ring 30, according to other embodiments of the present invention, is illustrated. The illustrated centering ring 30 includes an annular member 32 that has opposite inner and outer peripheral edges 32a, 32b. The illustrated centering ring 30 has a generally planar configuration and is configured to be secured within the socket 14 the tubular member 12 (FIG. 2) or the socket of other types of pipe fittings/connectors.

[0111] A first plurality of inwardly projecting gripping teeth 34 are on the inner peripheral edge 32a in circumferentially spaced-apart relationship. A second plurality of outwardly projecting gripping teeth 36 are on the outer peripheral edge 32b in circumferentially spaced-apart relationship. As with the centering ring embodiment illustrated in FIG. 4, typically, adjacent ones of the first plurality of gripping teeth 34 are spaced-apart between about one-quarter inch and about one inch (0.25-1.0). Similarly, adjacent ones of the second plurality of gripping teeth 36 typically are spaced-apart between about one-quarter inch and about one inch (0.25-1.0). However, the first plurality of gripping teeth 34 may be spaced apart by various other distances, and the second plurality of gripping teeth 36 may be spaced apart by various other distances.

[0112] In the illustrated embodiment of FIG. 5, the first and second plurality of teeth 34, 36 have a triangular shape and each one of the first plurality of gripping teeth 34 are substantially adjacent to a respective one of the second plurality of gripping teeth 36. However, in other embodiments, the first and second plurality of gripping teeth 34, 36 may have other shapes and may be staggered relative to each other.

[0113] In the illustrated embodiment of FIG. 5, the first plurality of gripping teeth 34 are larger than the second plurality of gripping teeth 36. Moreover, a distance D.sub.1 that each of the first plurality of gripping teeth 34 project inwardly from the inner peripheral edge 32a is greater than a distance D.sub.2 that each of the second plurality of gripping teeth 36 project outwardly from the outer peripheral edge 32b.

[0114] The pipe joint centering rings 30, 30 of FIGS. 4 and 5 may be formed of various materials without limitation. Exemplary materials include, but are not limited to aluminum and stainless steel (e.g., SS 304, etc.).

[0115] Referring to FIGS. 1-3 and 7, the illustrated pipe fitting 10 also includes a removable and reusable clamp 50 that secures the pipe section 16 (FIGS. 1-3) within the socket 14 as a bonding agent is injected into the gap G via one of the ports 22. The illustrated clamp 50 includes a plurality of arcuate segments 52. In the illustrated embodiment, the clamp includes three arcuate segments 52, each defining an arc of about 120?. However, embodiments of the present invention are not limited to three arcuate segments. Various numbers of arcuate segments 52 may be utilized. As illustrated in FIG. 8, each arcuate segment 52 includes first and second members 60, 70 that are matingly engaged and are secured together via a fastener. As such, the plurality of first and second members when joined together as described below form two rings (Ring A and Ring B) that are movably secured to each other and that work in concert with each other. Operation of the A and B rings are identified in cross-sectional view in FIGS. 10-13.

[0116] The first and second members 60, 70 of each arcuate segment 52 are secured together via a threaded fastener 80. As illustrated, the threaded fastener 80 extends through an aperture 72 in the second member 70 and threadingly engages threads 62 formed in the first member 60. A biasing member or spring 82 is associated with the fastener 80 and allows the first and second members 60, 70 (and, thereby, Ring A and Ring B) to axially separate as Ring A is radially compressed, as will be described below.

[0117] In the illustrated embodiment there are three arcuate segments 52, each having opposite end portions 52a, 52b. Accordingly, there are three locations where end portion 52a of one arcuate segment 52 is adjacent end portion 52b of an adjacent arcuate segment. The three arcuate segments 52 are joined together at two of these locations via hinges 54 (FIG. 7). The hinges facilitate movement of the arcuate segments 52 relative to each other to facilitate installation of the clamp 50 around a pipe fitting 12 and pipe section 16. In the illustrated embodiment, the hinges 54 are secured to adjacent end portions 70a, 70b of the second members 70 via threaded fasteners 55 which are threadingly secured to the second members 70 via threaded openings 81. However, there are various ways of connecting adjacent end portions 70a, 70b of the second members 70 and embodiments of the present invention are not limited to the illustrated configuration.

[0118] At the third location where end portion 52a of one arcuate segment 52 is adjacent end portion 52b of an adjacent arcuate segment, a tightening member 90 (FIG. 7) is provided. When the clamp 50 is installed on the pipe section 16 and pipe fitting 12, the tightening member 90 is used to radially compress the second members 70 into contact with the outer surface 16a of the pipe section 16. The illustrated tightening member 90 includes an elongated band 92 secured to one of the second members 70 and a rotatable member 94 secured to the adjacent second member 70. The band 92 includes a thread pattern 92t (e.g., similar to a hose clamp, etc.) formed in a surface 92a thereof. The rotatable member 94 includes a rotatable worm with teeth (not shown) that are configured to engage the thread pattern 92t. Rotation of the worm in one direction causes the tightening member 90 to radially compress the second members 70 into contact with the outer surface 16a of the pipe section 16 such that the clamp 50 is secured to the pipe section 16. In the illustrated embodiment, each second member 70 includes a contact surface 70c that includes teeth 70t for gripping the outer surface 16a of the pipe section 16.

[0119] Each arcuate segment 52 also includes a sealing member 64 (FIG. 8) attached to the first member 60, thereof. In the illustrated embodiment, each arcuate segment first member 60 includes a slot 63 formed therein. The sealing member 64 is an elastomeric material, such as rubber, and has a bar-bell or dog-bone shaped cross-sectional configuration and is configured to slide into the slot 63. This allows the sealing member 64 to be replaced if damaged and for cleaning purposes.

[0120] As illustrated in FIG. 9, each sealing member 64 has a length that is greater than a length of the respective arcuate segment first member 60 to which the sealing member 64 is attached. For example, in some embodiments, the length of each sealing member may be at least about 0.010 inch longer than the length of the arcuate segment first member 60. This extra length ensures that the ends of each sealing member 64 touch the ends of adjacent sealing members 64, thereby forming an annular seal that surrounds the pipe section 16. This annular seal prevents leakage of the bonding agent during the injection process.

[0121] As illustrated in FIGS. 2, 3, 8 and 10-13, the first and second members 60, 70 of each arcuate segment 52 are matingly engaged with each other. Each first member 60 has a serpentine or S-shaped cross-sectional configuration with an upper portion 60u and a lower portion 60L and that includes opposing arcuate grooves or channels 65, 66, as illustrated. Each second member 70 has a lower end portion 73 that has a generally L-shaped configuration that includes an arcuate groove or channel 74. An upper portion 60u of the first member is located within the channel 74 of the second member 70. The channel 74 has a height H1 that that is greater than a height H2 of the first member upper portion 60u. This allows the first members 60 of the arcuate segments 52 to move axially relative to the second members 70 during tightening of the clamp 50, as will described below.

[0122] The arcuate channel 65 in each of the first members 60 includes a sloped inner wall 65w, as illustrated. The tubular member 12 includes an annular flange 12f having a sloped outer wall 12w. When the clamp 50 is installed around a pipe section 16 and fitting 14, the arcuate groove 65 of each of the first members 60 receives the tubular member annular flange 12f therein. The sloped inner wall 65w of the groove 65 engages the annular flange sloped outer wall 12w. This configuration allows the first members 60 of each arcuate segment 52 to move axially away from the second members 70 as the first members 60 are moved radially inwardly via a tightening mechanism 100.

[0123] The illustrated tightening member 100 is configured to radially compress the first members 60 of each arcuate segment 52 such that the first members move radially and compress the respective sealing members 64 into sealing engagement with the tubular member 12 and pipe section 16 to seal an open end of the gap G. When a bonding agent is injected into the gap via a port, the sealing members prevent the bonding agent from leaking out of the open end of the socket. Once the bonding agent is injected, the clamp 50 is removed and can be reused. The clamp 50 may be removed before or after the bonding agent cures.

[0124] The illustrated tightening member 100 includes an elongated band 102 (FIG. 7) that extends around the first members 60 and includes a rotatable member 104. The band 102 includes a thread pattern 102t (e.g., similar to a hose clamp, etc.) formed in a surface 102a thereof. The rotatable member 104 includes a rotatable worm with teeth (not shown) that are configured to engage the thread pattern 102t. Rotation of the worm in one direction causes the tightening member 100 to radially compress the first members 60 (i.e., Ring A) such that the first members 60 move radially and compress the respective sealing members 64 into sealing engagement with the tubular member 12 and pipe section 16 to seal an open end of the gap G.

[0125] Radial compression of the first members 60 also causes the first members 60 to move axially away from the second members as the sloped inner walls 65w of the grooves 65 of the first members 60 engage the annular flange sloped outer wall 12w. This is illustrated in FIGS. 10-13. FIGS. 10 and 11 illustrate the embodiment of FIG. 2 wherein the centering device is a centering ring 30 and FIGS. 12 and 13 illustrate the embodiment of FIG. 3 wherein the centering device is a plurality of circumferentially spaced-apart raised members or bumps 40.

[0126] In FIGS. 10 and 12, the clamp 50 is installed on the pipe section 16 and fitting 12. The upper tightening member 90 has been tightened such that the second members 70 are radially compressed into contact with the outer surface 16a of the pipe section. The lower tightening member 100 is loose in FIGS. 10 and 12. Referring now to FIGS. 11 and 13, the lower tightening member 100 has been tightened such that the first members 60 are compressed radially inwardly. The radial compression causes the first members 60 to move axially away from the second members 70 (downwardly in FIGS. 11 and 13) as the sloped inner wall 65w of each groove 65 slides along the annular flange sloped outer wall 12w. As such, the sealing members 64 are compressed into sealing engagement with the tubular member 12 and pipe section 16 to seal an open end of the gap G, as illustrated in FIGS. 11 and 13.

[0127] The pipe fitting is ready to receive a bonding agent BA in the gap G, as illustrated in FIGS. 11 and 13. Typically, only one of the ports 22 is used for injecting the bonding agent into the gap G that is formed between the outer surface 16a of the pipe section 16 and the inner surface 14a of the socket 14, and the other port 22 is used as a vent to allow air to escape as it is pushed out by the bonding agent, and to identify when the gap is full of bonding agent. Exemplary bonding agents that may be used to join the pipe section 50 and the connector 30 are described in, for example, U.S. Pat. Nos. 4,052,244, 5,656,345, 6,949,602, U.S. Patent Application Publication No. 2013/0267670, and U.S. Patent Application Publication No. 2013/0261247, all of which are incorporated herein by reference in their entireties. Once the bonding agent BA is injected into the gap G, the clamp 50 is removed. The clamp 50 may be removed before or after the bonding agent BA cures.

[0128] Referring now to FIG. 14 the pipe fitting 10 of FIGS. 1-3 is illustrated with a reinforcement band 104 positioned therearound. As described above, the pipe fitting has a tubular member 12 with a socket 14 configured to receive an end of a pipe section therein. A pair of ports 22 extend through the tubular member 12 that facilitate the injection of adhesive into the socket, as described above. The illustrated reinforcement band 104 includes openings 106 formed therein to provide access to the ports 22. The reinforcement band 104 can have various shapes, sizes and configurations. Embodiments of the present invention are not limited to the illustrated configuration of the reinforcement band 104.

[0129] The reinforcement band 104 may be secured (e.g., adhesively secured, etc.) to the outer surface of the tubular member 12 or may be positioned onto the tubular member 12 and held in place via friction. Other methods of securing the reinforcement band 104 around the tubular member 12 are possible including, but not limited to, crimping, clamping (e.g., via a clamp, such as a pipe or hose clamp), etc. In some embodiments, the reinforcement band 104 may be positioned and/or secured onto the tubular member 12 during manufacturing of the tubular member 12.

[0130] The reinforcement band 104 may be formed from various materials, but is typically a metal reinforcement band, such as, but not limited to, steel, stainless steel, aluminum, brass, etc. The reinforcement band 104 is typically used in high pressure and/or temperature piping environments. The reinforcement band can reduce stress in the wall of the pipe fitting 10 in the hoop direction and can provide dimensional stability.

[0131] Referring now to FIGS. 15 and 16, a pipe fitting 200 comprising a socket 202 that is configured to receive an end of a pipe section therein is illustrated. The illustrated pipe fitting 200 is referred to as a brush on pipe fitting in that adhesive is applied to the outer surface of the end of a pipe section, for example via an applicator such as a brush, prior to insertion into the pipe fitting socket 202. The pipe fitting 200 includes a reinforcement band 204 positioned around an outer surface of the pipe fitting 200, as illustrated.

The reinforcement band 204 may be secured (e.g., adhesively secured, etc.) to the outer surface of the pipe fitting 200 or may be positioned onto the pipe fitting 200 and held in place via friction.

[0132] As described above with respect to FIG. 14, the reinforcement band 204 may be formed from various materials, but is typically a metal reinforcement band, such as, but not limited to, steel, stainless steel, aluminum, brass, etc. The reinforcement band 204 is typically used in high pressure and/or temperature piping environments. The reinforcement band can reduce stress in the wall of the pipe fitting 200 in the hoop direction and can provide dimensional stability. The reinforcement band 204 can have various shapes and configurations. Embodiments of the present invention are not limited to the illustrated configuration of the reinforcement band 204.

[0133] According to other embodiments of the present invention, a pipe fitting (e.g., pipe fitting 10 of FIGS. 1-3, pipe fitting 200 of FIGS. 15-16) may be formed with glass fiber reinforcement (GFR) material therein to improve hoop strength of the pipe fitting. The term glass fiber, as used herein, is intended to include various types of reinforcing fibers including, but not limited to, glass, carbon, aramid, basalt, and the like.

[0134] A pipe fitting with GFR material therein is typically used in high pressure and/or temperature piping environments. The GFR material can reduce stress in the wall of the pipe fitting in the hoop direction and can provide dimensional stability.

[0135] Referring now to FIG. 17, the pipe fitting 10 of FIGS. 1-3 is illustrated with a pipe stop 20 having an increased radial length W.sub.1 as compared with the embodiment of FIGS. 1-3. In the illustrated embodiment of FIG. 17, the radial length W.sub.1 of the pipe stop 20 is greater than the thickness W.sub.2 of the wall of the pipe 16 inserted within the socket 14. In the illustrated embodiment, the radial length W.sub.1 of the pipe stop causes the radial inner edge 20a of the pipe stop to align with the inner surface 16i of the pipe 16 inserted within the socket 14. The pipe stop 20 having the increased radial length, as illustrated in FIG. 17, increases the hoop strength of the socket and is typically used in high pressure and/or temperature piping environments. In other embodiments, the radial length W.sub.1 of the pipe stop may be substantially the same as the thickness W.sub.2 of the wall of the pipe 16.

[0136] Referring now to FIGS. 18A-18C, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each configured to receive an end 16a of a respective pipe section 16 (FIG. 18C) therein. In the illustrated embodiment, the pipe fitting 10 is shaped as a straight union, wherein the longitudinal axes A1, A2 of the two sockets 14 are colinear. However, embodiments of the present invention are not limited thereto. The pipe fitting 10 can be shaped as a T (FIG. 25B), an elbow (FIG. 25B), a Y (FIG. 25C), a cross (FIG. 25D) or in any other desired geometry wherein the longitudinal axes of at least two of the sockets 14 are non-colinear.

[0137] Each socket 14 has an internal diameter Ds (FIG. 18B) that is larger than the outer diameter Dp (FIG. 18B) of the pipe section 16 such that a gap G exists between an outer surface of the pipe section 16 and an inner surface 14a of the socket 14 when the pipe section 16 is centered within the socket 14. Each socket 14 includes an open free end 18 through which the end 16a of a respective pipe section 16 is inserted and a pipe stop 20 that is configured to matingly engage with the end 16a of the pipe section 16. In the illustrated embodiment, the pipe stop 20 is an annular member that extends from the inner surface 14a of each the socket 14. The annular pipe stop 20 may have a radial length that is equal to or greater than a wall thickness of the pipe section 16. However, the pipe stop 20 may have a radial length that is less than a wall thickness of the pipe section in other embodiments. Moreover, the pipe stop may have other configurations, as well.

[0138] In some embodiments of the present invention, prior to insertion within the socket 14, material is removed from the pipe end 16a (e.g., via a hand tool or lathe, etc.) to create a profiled end 17 (FIG. 18B) that matingly engages with the pipe stop 20. As illustrated, the profiled end 17 includes a tapered portion 17a and an engagement portion 17b. The tapered portion 17a is inserted into the opening of the annular pipe stop 20 and the engagement portion 17b is configured to abut against the pipe stop 20 in face-to-face relationship. The profiled end 17 acts as a locating pin at the pipe stop 20 and facilitates insertion of the pipe end 16a fully within the socket 14. The tapered portion 17a of the pipe end 16a is angled such that when the pipe section 16 is fully bottomed against the pipe stop 20, the pipe section 16 cannot move side to side (radially) in any direction.

[0139] Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent is injected into the gap G via one of these ports 22, as previously described above. Typically, only one of the ports 22 associated with each socket 14 is used for injecting the bonding agent into the gap G between the outer surface 16a of the pipe section 16 and the inner surface 14a of the socket 14. The other port 22 is used as a vent to allow air to escape as it is pushed out by the bonding agent, and also to identify when the gap G is full of bonding agent. The pipe fitting 10 may be formed with GFR material therein to improve hoop strength of the pipe fitting, as described above.

[0140] Referring to FIGS. 19A-19C, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each configured to receive an end 16a of a respective pipe section 16 (FIG. 19B) therein, as described above. Each socket 14 includes an open free end 18 through which the end 16a of a respective pipe section 16 is inserted and a pipe stop 20 that is configured to matingly engage with the end 16a of the pipe section. In the illustrated embodiment, the pipe stop 20 is an annular member that extends from the inner surface 14a of each the socket 14. However, the pipe stop 20 may have other configurations, as well. Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent is injected into the gap G via one of these ports 22, as previously described above.

[0141] Each socket 14 also includes an annular sealing member 23 (e.g., an O-ring or other ring-like article of compressible material, etc.) therein that abuts the pipe stop 20. Each annular sealing member 23 may have various cross-sectional shapes. Embodiments of the present inventive concept are not limited to annular sealing members with round cross-sectional shapes. Together, the two annular sealing members 23 are configured to seal a joint J between the ends 16A of the two pipe sections 16, as illustrated in FIG. 19B.

[0142] In some embodiments, each socket 14 includes an annular channel 24 formed in the inner surface 14a adjacent the pipe stop 20, and the annular sealing member 23 is positioned at least partially within the annular channel 24, as illustrated in FIG. 19C. As shown in FIG. 19C, the annular sealing member 23 in each socket 14 extends outwardly from a respective annular channel 24 so as to have a portion thereof within the gap G between the socket wall inner surface 14a and a pipe section 16 within the socket 14. In some embodiments, the annular sealing member 23 in each socket 14 can be molded in place during the molding of the tubular member 12.

[0143] Referring to FIGS. 20A-20C, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each configured to receive an end 16a of a respective pipe section 16 (FIG. 20B) therein, as described above. Each socket 14 includes an open free end 18 through which the end 16a of a respective pipe section 16 is inserted and a pipe stop 20 that is configured to matingly engage with the end 16a of the pipe section. In the illustrated embodiment, the pipe stop 20 is an annular member that extends from the inner surface 14a of each the socket 14. However, the pipe stop 20 may have other configurations, as well. Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent is injected into the gap G via one of these ports 22, as previously described above.

[0144] Each socket 14 also includes an annular sealing member 23b (e.g., an O-ring, or other ring-like article of compressible material, etc.) therein that is at or adjacent the open free end 18. Each annular sealing member 23b is configured to seal an open end of the gap G (FIG. 20B). Each annular sealing member 23b may have various cross-sectional shapes. Embodiments of the present inventive concept are not limited to annular sealing members with round cross-sectional shapes.

[0145] In some embodiments, each socket 14 includes an annular channel 24 formed in the inner surface 14a at or adjacent the open free end 18, and the annular sealing member 23b is positioned at least partially within the annular channel 24, as illustrated in FIG. 20C. As shown in FIG. 20C, the annular sealing member 23b in each socket 14 extends outwardly from a respective annular channel 24 so as to have a portion thereof within the gap G between the socket wall inner surface 14a and a pipe section 16 within the socket 14. In some embodiments, the annular sealing member 23 in each socket 14 can be molded in place during the molding of the tubular member 12.

[0146] Referring to FIGS. 21A-21C, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each configured to receive an end 16a of a respective pipe section 16 (FIG. 21B) therein, as described above. Each socket 14 includes an open free end 18 through which the end 16a of a respective pipe section 16 is inserted and a pipe stop 20 that is configured to matingly engage with the end 16a of the pipe section. In the illustrated embodiment, the pipe stop 20 is an annular member that extends from the inner surface 14a of each the socket 14. However, the pipe stop 20 may have other configurations, as well. Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent is injected into the gap G via one of these ports 22, as previously described above.

[0147] Each socket 14 also includes an annular sealing member 23b (e.g., an O-ring, or other ring-like article of compressible material, etc.) therein that is at or adjacent the open free end and that is configured to seal an open end of the gap G (FIG. 21B). In addition, each socket 14 also includes an annular sealing member 23a (e.g., an O-ring or other ring-like article of compressible material, etc.) therein that abuts the pipe stop 20. Together, the two annular sealing members 23a at the pipe stop 20 are configured to seal a joint J between the ends 16A of the two pipe sections 16, as illustrated in FIG. 21B. The annular sealing members 23a, 23b may have various cross-sectional shapes. Embodiments of the present inventive concept are not limited to annular sealing members with round cross-sectional shapes.

[0148] In some embodiments, each socket 14 includes an annular channel 24 formed in the inner surface 14a at or adjacent the open free end 18 and an annular channel 24 formed in the inner surface 14a adjacent the pipe stop 20. The annular sealing member 23b is positioned at least partially within the annular channel 24 adjacent the open free end 18 of each socket, and the annular sealing member 23a is positioned at least partially within the annular channel 24 adjacent the pipe stop 20, as illustrated in FIG. 21C. As shown in FIG. 21C, the annular sealing members 23a, 23b in each socket 14 extend outwardly from a respective annular channel 24 so as to have a portion thereof within the gap G between the socket wall inner surface 14a and a pipe section 16 within the socket 14. In some embodiments, the annular sealing members 23a, 23b in each socket 14 can be molded in place during the molding of the tubular member 12.

[0149] Referring to FIGS. 22A-22C, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each configured to receive an end 16a of a respective pipe section 16 (FIG. 22B) therein, as described above. Each socket 14 includes an open free end 18 through which the end 16a of a respective pipe section 16 is inserted. Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent is injected into the gap G via one of these ports 22, as previously described above.

[0150] An annular sealing member 23 (e.g., an O-ring or other ring-like article of compressible material, etc.) is positioned within the tubular member 12 at a medial location of the tubular member 12 between the two sockets 14. The annular sealing member 23 is configured to seal a joint J between the ends 16A of the two pipe sections 16, when inserted in the respective sockets 14, as illustrated in FIG. 22B. The annular sealing member 23 may have various cross-sectional shapes. Embodiments of the present inventive concept are not limited to an annular sealing member with a round cross-sectional shape.

[0151] In some embodiments, each socket 14 includes an annular channel 24 formed in the inner surface 14a at the medial location, and the annular sealing member 23 is positioned at least partially within the annular channel 24, as illustrated in FIG. 22C. As shown in FIG. 22C, the annular sealing member 23 extends outwardly from the annular channel 24 so as to have a portion thereof within the gap G between the socket wall inner surface 14a and a pipe section 16 within the socket 14. In some embodiments, the annular sealing member 23 can be molded in place during the molding of the tubular member 12.

[0152] Referring to FIGS. 23A-23C, a pipe fitting 10, according to some embodiments of the present invention, is illustrated. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each configured to receive an end 16a of a respective pipe section 16 (FIG. 23B) therein, as described above. Each socket 14 includes an open free end 18 through which the end 16a of a respective pipe section 16 is inserted. Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent is injected into the gap G via one of these ports 22, as previously described above.

[0153] A pair of annular sealing members 23 (e.g., O-rings or other ring-like articles of compressible material, etc.) are positioned within the tubular member 12 at a medial location of the tubular member 12 between the two sockets 14. The annular sealing members 23 may have various cross-sectional shapes. Embodiments of the present inventive concept are not limited to annular sealing members with a round cross-sectional shape. The annular sealing members 23 are configured to seal a joint J between the ends 16A of the two pipe sections 16, when inserted in the respective sockets 14, as illustrated in FIG. 23B.

[0154] In some embodiments, each socket 14 includes a pair of annular channels 24 formed in the inner surface 14a at the medial location, and the annular sealing members 23 are positioned at least partially within the annular channel 24, as illustrated in FIG. 23C. As shown in FIG. 23C, the annular sealing members 23 extend outwardly from the annular channels 24 so as to have a portion thereof within the gap G between the socket wall inner surface 14a and a pipe section 16 within the socket 14. In some embodiments, the annular sealing members 23 can be molded in place during the molding of the tubular member 12.

[0155] Referring to FIGS. 24A-24C, a partial view of a pipe joint assembly 300, according to some embodiments of the present invention, is illustrated. The pipe joint assembly 300 includes a pipe fitting 10 and a pair of pipe sections 16. The pipe fitting 10 includes a tubular member 12 having a pair of sockets 14, each socket 14 configured to receive an end 16a of a respective pipe section 16 therein, as described above. Each socket 14 includes a pair of ports 22 that extend through the tubular member 12 in circumferentially spaced-apart relationship and are in fluid communication with the gap G between the inner surface 14a of the socket 14 and the outer surface of the pipe section 16. In the illustrated embodiment, the ports 22 are diametrically opposed, although the ports 22 may be arranged at other configurations as well. A bonding agent BA (FIGS. 24B, 24C) is injected into the gap G via one of these ports 22, as previously described above.

[0156] An annular sealing member 23 (e.g., an O-ring or other ring-like article of compressible material, etc.) is positioned within the tubular member 12 at a medial location of the tubular member 12 between the two sockets 14. The annular sealing member 23 is configured to seal a joint J between the ends 16A of the two pipe sections 16, when inserted in the respective sockets 14. The end 17 of each pipe section 16a includes a notch or groove 19 formed therein, as illustrated. During installation, the ends 17 of the pipe sections 16a are pressed together within the tubular member 12 so that a bonding agent BA can be injected into the gap G between the tubular member 12 and each pipe section 16. This causes the annular sealing member 23 to deform and be pushed at least partially into the groove 19 in each pipe end 16a, as illustrated in FIG. 24B. After the bonding agent BA has cured and the pipe joint is complete, when placed under hydrostatic or compressed air pressure (e.g., when in use), this internal pressure forces the annular sealing member 23 backward and deeper into each groove 19 providing a leak-free seal, as illustrated in FIG. 24C.

[0157] Referring to FIG. 24D, a pipe joint assembly 300 according to some embodiments is illustrated. The tubular member 12 of the pipe fitting 10 includes a pipe stop 20, as described above with respect to FIGS. 19A-19C. During installation, the end 17 of each pipe section 16a within a socket 14 is pressed against the pipe stop 20 which causes the annular sealing member 23a to deform and be pushed at least partially into the groove 19 in the pipe end 16a.

[0158] Referring to FIG. 24E, a pipe joint assembly 300 according to some embodiments is illustrated. The tubular member 12 of the pipe fitting 10 includes a pipe stop 20, as described above with respect to FIGS. 19A-19C. The pipe stop includes opposing grooves 21 formed therein as illustrated. During installation, the end 17 of each pipe section 16a within a socket 14 is pressed against the pipe stop 20 which causes the annular sealing member 23a to deform and be pushed at least partially into both the groove 19 in the pipe end 16a and the groove 21 in the pipe stop.

[0159] Referring to FIG. 24F, a partial view of a pipe fitting 10 according to some embodiments is illustrated. The pipe fitting 10 includes a tubular member 12 having first and second sockets 14. The first socket 14 is configured to receive an end 16a of a first pipe section 16 therein such that a first gap G exists between an outer surface of the first pipe section and an inner surface of the first socket 14. The second socket 14 is configured to receive an end of a second pipe section therein such that a second gap exists between an outer surface of the second pipe section and an inner surface of the second socket. Only one pipe section 16 is illustrated in FIG. 24F, but it is understood that another pipe section 16 is configured to be received in the other socket 14. An annular pipe stop 20 extends from an inner surface of the tubular 12 member and is configured to matingly engage with the end 16a of the first pipe section 16 and to matingly engage with an end of a second pipe section. A first annular sealing member 23a is illustrated within the first socket 14. The second socket is also intended to include a second annular sealing member therein, although only one annular sealing member 23a is illustrated in FIG. 24F. The pipe stop 20 includes opposing first and second grooves 21 formed therein. The first annular sealing member 23a is configured to be at least partially forced into the first groove 21 when the first pipe section 16 is received in the first socket 14 and a second annular sealing member is configured to be at least partially forced into the second groove 21 when a second pipe section is received in the second socket 14. In the illustrated embodiment, the ends 17 of the pipe sections 16 do not include respective grooves.

[0160] The various annular sealing members 23, 23a, 23b described herein may be formed of various materials. In some embodiments, the annular sealing members 23, 23a, 23b may be composed of a non-swelling, substantially inert performance rubber, such as ethylene propylene diene monomer (EPDM, silicone, fluorinated rubbers (Viton? fluoroelastomers a product of Dupont)) and ethylene acrylic elastomers (Vamac? a product of Dupont), and combinations thereof.

[0161] In the various embodiments illustrated above in FIGS. 18A-18C, 19A-19C, 20A-20C, 21A-21C, 22A-22C, 23A-23C, and 24A-24F, a removable and reusable clamp, such as the clamp described above, that secures a pipe section 16 within a socket 14 as a bonding agent is injected into a gap G via one of the ports 22 may be utilized. However, such a clamp is not required.

[0162] The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although a few exemplary embodiments of this invention have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. The invention is defined by the following claims, with equivalents of the claims to be included therein.