Abstract
A fill valve assembly for use in association with a filler device including: a vent tube; a valve housing; a valve sleeve; and a quick start seal member, wherein: (1) the vent tube is positioned at least partially within the valve housing and the valve sleeve, (2) the valve housing is in communication with the filler device, (3) the valve sleeve is positioned at least partially within the valve housing, (4) the quick start seal member is positioned within the valve housing; and (5) the fill valve assembly is configured for precluding filling start lag during normal operation of the filler device.
Claims
1. A fill valve assembly comprising: a valve body, the valve body having a valve adapter structurally configured to be attachable to a filler device, and, a valve sleeve slidably movable relative to the valve body, together defining an inner valve volume, with the valve body having an upper inlet and the valve sleeve having a lower outlet which is opposite the upper inlet; a vent tube extending through the valve body from the upper inlet to the lower outlet, with the vent tube having a lower end sealingly engageable with the lower outlet, the vent tube having a stop member extending radially outward from an outer surface thereof and spaced apart from the upper inlet of the valve body and an inner passage extending from the lower end to an upper end thereof, with the inner passage being fluidly isolatable from the inner valve volume; a seal member encircling the vent tube and freely slidably movable between the stop member and the upper inlet, the seal member having a upper surface at least partially sealingly engageable with the upper inlet, when slidably directed toward the upper inlet, wherein the seal member at least partially blocks the inner valve volume to limit the passage of fluid through the upper inlet into the inner valve volume, and wherein when positioned proximate the stop member, the seal member is spaced apart from the upper inlet, wherein, the seal member is freely movable relative to the vent tube independent of the position of the valve sleeve relative to the valve adapter.
2. The fill valve assembly of claim 1 wherein the vent tube is positionally fixed relative to the valve adapter, with the valve sleeve being slidably movable relative to the vent tube.
3. The fill valve assembly of claim 1 wherein the seal member comprises a substantially cylindrical member having a central opening wherein the cylindrical member is configured to encircle the vent tube, and wherein the central opening is sized so as to permit slidable movement of the seal member relative to the vent tube.
4. The fill valve assembly of claim 3 wherein the cylindrical member includes a substantially planar upper and lower surface, with the upper surface configured to engage with the upper inlet and the lower surface configured to engage the stop member.
5. The fill valve assembly of claim 4 wherein at least one of the upper surface and the lower surface further includes a plurality of protrusions disposed thereon.
6. The fill valve assembly of claim 1 wherein the valve sleeve is slidably movable from a closed position to a first open position, with the stop member being spaced apart from the valve sleeve in the first open position.
7. The fill valve assembly of claim 1 wherein further comprising a seal member extending around the valve sleeve and engaging the valve adapter to form a seal therebetween.
8. The fill valve assembly of claim 7 wherein the valve sleeve is slidably movable into a first open position wherein the seal member engages an inner surface of the valve sleeve and slidably movable to second open position wherein the seal member is spaced apart from the valve sleeve and in fluid communication with the inner valve volume.
9. The fill valve assembly of claim 1 wherein the density of the seal member is less than a fluid positioned within the inner valve volume, to in turn allow the seal member to float to the upper inlet when the inner valve volume is filled with the fluid and the valve is in a closed position.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention will now be described with reference to the drawings wherein:
(2) FIG. 1A of the drawings is an assembled perspective view of a fill valve assembly fabricated in accordance with the present invention;
(3) FIG. 1B of the drawings is an exploded perspective view of a fill valve assembly fabricated in accordance with the present invention;
(4) FIG. 2 of the drawings is a perspective view of a vent tube fabricated in accordance with the present invention;
(5) FIG. 3 of the drawings is a perspective view of a valve housing fabricated in accordance with the present invention;
(6) FIG. 4 of the drawings is a perspective view of a valve sleeve fabricated in accordance with the present invention;
(7) FIG. 5A of the drawings is a perspective view of a seal member fabricated in accordance with the present invention;
(8) FIG. 5B of the drawings is a side elevational view of a seal member fabricated in accordance with the present invention;
(9) FIG. 6A of the drawings is a top plan view of a fill valve assembly fabricated in accordance with the present invention;
(10) FIG. 6B of the drawings is a cross-sectional view of the fill valve assembly of FIG. 6A taken along line A-A, showing among other things, the fill valve assembly in a closed position;
(11) FIG. 6C of the drawings is a cross-sectional view of the fill valve assembly of FIG. 6A taken along line A-A, showing among other things, the fill valve assembly in a closed position wherein the quick start seal member comprises a density less than that of the fill material or product that it is filling, and, as such, contacts the inner top surface of the valve housing;
(12) FIG. 7A of the drawings is a top plan view of a fill valve assembly fabricated in accordance with the present invention;
(13) FIG. 7B of the drawings is a cross-sectional view of the fill valve assembly of FIG. 7A taken along line A-A, showing among other things, the fill valve assembly in a first open position;
(14) FIG. 8A of the drawings is a top plan view of a fill valve assembly fabricated in accordance with the present invention;
(15) FIG. 8B of the drawings is a cross-sectional view of the fill valve assembly of FIG. 8A taken along line A-A, showing among other things, the fill valve assembly in a second open position;
(16) FIG. 9A of the drawings is a top plan view of a fill valve assembly fabricated in accordance with the present invention; and
(17) FIG. 9B of the drawings is a cross-sectional view of the fill valve assembly of FIG. 9A taken along line A-A, showing among other things, the fill valve assembly in a CIP position.
DETAILED DESCRIPTION OF THE INVENTION
(18) While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will be described in detail, one or more specific embodiments with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment illustrated.
(19) It will be understood that like or analogous elements and/or components, referred to herein, are identified throughout the drawings by like reference characters. In addition, it will be understood that the drawings are merely schematic representations of an embodiment of the invention, and some of the components may have been distorted from their actual scale for purposes of pictorial clarity.
(20) Referring now to the drawings, and to FIGS. 1A and 1B in particular, fill valve assembly 10 is shown, which generally comprises vent tube 12, valve housing 14, valve sleeve 16, and quick start seal member 18 (FIG. 1B only). Fill valve assembly 10 is intended for use in association with filler devices, which are generally capable of filling associated containers and/or bags with any one of a number of fill materials. Such filler devices may comprise linear filler devices, rotary filler devices and other devices which are capable of filling containers, bottles, and/or packages with fill material and/or product.
(21) In accordance with one embodiment of the present invention, fill valve assembly 10 comprises a quick start fill valve assembly for use in association with a filler device which is free or substantially free from product fill start lag via cooperative association of internal, quick start seal member 18 therewith. As will be discussed in greater detail infra, fill valve assembly 10 is capable of four distinct positions, namely: (1) a closed position (See FIG. 6B); (2) a first open position wherein the quick start seal member contacts an upper wall of the valve housing (See FIG. 7B); (3) a second open position wherein the quick start seal member contacts a lower displacement stop member of the vent tube (See FIG. 8B); and (4) a CIP position (See FIG. 9B).
(22) Referring now to FIGS. 1A and 2, vent tube 12 is positioned generally within both valve housing 14 and valve sleeve 16, and includes upper end 20, lower end 22, and intermediate region 24 positioned between upper and lower ends 20 and 22, respectively. Upper end 20 includes upper venting aperture 26 which is in communication with the reservoir of an associated filler device. Intermediate region 24 includes stop member 28 having generally annular upper surface 30. It will be understood that during normal operation stop member 28 regulates the lower displacement of quick start seal member 18. Lower end 22 includes alignment tabs 32, lower venting aperture 34, and lower seal member 36 which comprises an O-ring (not shown for pictorial clarity) seated in an annular channel.
(23) As is best shown in FIGS. 1A and 3, valve housing 14 (e.g., a valve adapter, etcetera) is associated with filler device 80 (See FIGS. 6B, 7B, 8B, and 9B) on one end and valve sleeve 16 on the other end. More specifically, valve housing 14 includes upper end 38, lower end 40 (valve body), and intermediate region 42 positioned between upper and lower ends 38 and 40, respectively. Upper end 38 includes vent tube alignment aperture 44 and upper stop members 46. Intermediate region 42 includes generally annular flange 48 which, in cooperation with a clamp (not shown), facilitates releasable securement to associated filler device 80. With additional reference to FIG. 7B, the valve housing includes inner top surface 49 with upper inlet 47. As is best shown in FIGS. 6B, 7B, 8B, and 9B, it will be understood that during normal operation inner surface 41 of lower end 40 of valve housing 14 is in communication with the outer surface 51 of valve sleeve 16.
(24) Referring now to FIGS. 1A and 4, valve sleeve 16 is positioned both generally below and partially within valve housing 14, and includes upper end 50, lower end 52 (defining lower outlet 55, FIG. 7B), and intermediate region 54 positioned between upper and lower ends 50 and 52, respectively. Valve sleeve 16 includes outer surface 51 and generally annular channel 58 for containing a seal member such as a flip-flop seal (See U.S. Pat. No. 5,083,593), an O-ring, etcetera. Intermediate region 54 includes a plurality of generally annular flanges 56 for containing a conventional compression spring (not shown).
(25) As is best shown in FIGS. 5A and 5B quick start seal member 18 includes body 62, upper surface 64, lower surface 66, and optionally a plurality of protrusions 68 positioned on upper and lower surfaces 64 and 66, respectively. It will be understood that protrusions 68 facilitate easy cleaning, as well as substantially reduce the likelihood that seal member 18 will stick to a surface (e.g., annular upper surface 30 of stop member 28) after non-use for a period of time. In one embodiment protrusions 68 are circumferentially evenly spaced apart from one another on both upper surface 64 and lower surface 66. Upper surface 64 includes tapered edge 70 and lower surface 66 includes tapered edge 72. Quick start seal member 18 is preferably fabricated from a food grade silane, siloxane, and/or silicone polymer and/or co-polymer. While specific polymeric materials have been disclosed as being preferred, numerous other materials that would be known to those having ordinary skill in the art having the present disclosure before them are likewise contemplated for use.
(26) In operation and in one embodiment of the present invention, fill valve assembly 10 is positionable among four distinct positions, namely: (1) a closed position (See FIG. 6B); (2) a first open position wherein the quick start seal member contacts an upper wall of the valve housing (See FIG. 7B); (3) a second open position wherein the quick start seal member contacts a lower displacement stop member of the vent tube (See FIG. 8B); and (4) a CIP position (See FIG. 9B).
(27) As is shown in FIGS. 6A and 6B, the closed position precludes product from being dispensed. In this position, quick start seal member 18 is open, intermediate seal member 74 is closed, and lower seal member 36 is closed. More specifically, when fill valve assembly 10 is in the closed position: (1) protrusions 68 associated with lower surface 66 (See FIGS. 5A and 5B) of quick start seal member 18 contact annular upper surface 30 of stop member 28 of vent tube 12; (2) intermediate seal member 74 sealingly engages outer surface 51 of valve sleeve 16 and inner surface 41 of valve housing 14; and (3) lower seal member 36 sealingly engages the lower end of vent tube 12 and inner surface 53 lower end 52 of valve sleeve 16.
(28) In an alternative embodiment of the present invention, the performance of quick start fill valve assembly 10 can be further enhanced if, in many cases, quick start seal member 18 comprises a density less than that of the fill material or product that it is filling. As is best shown in FIG. 6C, it will be understood that in this embodiment, quick start seal member 18 floats and/or rises up to and contacts inner top surface 49 of valve housing 14 even when quick start fill valve assembly 10 is in the closed position. It will be further understood that displacement and/or vertical movement of valve sleeve 16 is not required to raise and seal quick start seal member 18 because, in this embodiment, it is already properly positioned against inner top surface 49 of valve housing 14 due to its lighter density differential relative to the fill material or product.
(29) As is shown in FIGS. 7A and 7B, upon actuation via cam or other displacement means, the first open position precludes or substantially precludes any filling start lag or pause. In this position, quick start seal member 18 is temporarily closed, intermediate seal member 74 is closed, and lower seal member 36 is open. More specifically, when fill valve assembly 10 is in the first open position: (1) protrusions 68 associated with upper surface 64 (See FIGS. 5A and 5B) of quick start seal member 18 contact inner top surface 49 of valve housing 14; (2) intermediate seal member 74 sealingly engages outer surface 51 of valve sleeve 16 and inner surface 41 of valve housing 14; and (3) lower seal member 36 disengages the seal between lower end 22 of vent tube 12 and inner surface 53 of lower end 52 of valve sleeve 16. Without being bound by any one particular theory, it is believed that first open position precludes or substantially precludes any filling start lag because as valve sleeve 16 rises, so does quick start seal member 18. This occurs because vent tube 12 is full of fluid, and fluid cannot flow into the associated sealed container (sealed from the atmosphere) until some air flows out of the container. Therefore, hydraulic compression of the fluid in the valve sleeve cavity, being non-compressible, lifts quick start seal member 18 up until it contacts upper inside surface 49 of valve adaptor 14. At this point, fluid from the filler bowl cannot begin to flow down in the bottle as its path is blocked (i.e., the seal member forms a check valve against the upper inside surface which allows for fluid flow from the filler bowl but not to the filler bowl). Now, further rise of the valve sleeve causes the fluid trying to be compressed to flow out the valve nozzle into the container. Since the mouth of the container is sealed from the outside atmosphere, air inside the container begins to be compressed and build up a pressure that can only escape thru the vent tube that is full of liquid from the previous container. This buildup of “back pressure” from the valve sleeve rising, forces the liquid in the vent tube to move vertically up and out through vent aperture 26. When the valve sleeve is finished rising, vent tube 12 has been cleaned of fluid so that previously trapped air can now flow upward and fluid can then begin to flow downward from above out just above lower seal member 36 and into the container. The moment fluid begins to flow down, quick start seal member 18 also moves down and repositions itself on annular upper surface 30 of stop member 28 of vent tube 12 (i.e., a check valve as set forth above). During this time, intermediate seal member 74 is closed and lower seal member 36 is open. (See FIGS. 8A and 8B).
(30) More specifically, when fill valve assembly 10 is in the second open position: (1) protrusions 68 associated with lower surface 66 (See FIGS. 5A and 5B) of quick start seal member 18 contact annular upper surface 30 of stop member 28 of vent tube 12; (2) intermediate seal member 74 sealingly engages outer surface 51 of valve sleeve 16 and inner surface 41 of valve housing 14; and (3) lower seal member 36 disengages the lower end of vent tube 12 and inner surface 53 lower end 52 of valve sleeve 16. This second open position does not require further vertical movement of valve sleeve 16 as downward fluid flow provides the energy necessary to reposition quick start seal member 18 back on to annular upper surface 30 of stop member 28 of vent tube 12.
(31) As is shown in FIGS. 9A and 9B, upon further actuation via cam or other displacement means, the CIP position allows for cleansing of the fill valve assembly without disassembly. In this position, quick start seal member 18 is open or unobstructive, intermediate seal member 74 is open, and lower seal member 36 is open. More specifically, when fill valve assembly 10 is in the CIP position: (1) protrusions 68 associated with lower surface 66 (See FIGS. 5A and 5B) of quick start seal member 18 contact annular upper surface 30 of stop member 28 of vent tube 12; (2) intermediate seal member 74 disengages a portion of outer surface 51 of valve sleeve 16 and inner surface 41 of valve housing 14; and (3) lower seal member 36 disengages the lower end of vent tube 12 and inner surface 53 lower end 52 of valve sleeve 16.
(32) The foregoing description merely explains and illustrates the invention and the invention is not limited thereto except insofar as the appended claims are so limited, as those skilled in the art who have the disclosure before them will be able to make modifications without departing from the scope of the invention.
