Abstract
A tool-operated adjustment device includes a housing supporting a rotatable spool that is operably coupled to a tension line. The spool is configured to rotate about a first axis in a first direction to wind the tension line, and to rotate in a second direction opposite the first direction to unwind the tension line. The device includes a socket pivotally coupled to the housing and configured to rotate about a second axis. The socket is selectively coupled to the spool to drive rotation of the spool in the first direction. The socket is configured to removably connect and disconnect to a tool configured to rotate the socket about the second axis. The device includes a release mechanism that is configured to selectively release the spool such that the spool is free to rotate in either the first or second direction in response to manual forces applied to the release mechanism.
Claims
1. A tool-operated adjustment device for use with at least one tension line, the adjustment device comprising: a housing supporting a rotatable spool that is operably coupled to the at least one tension line, wherein the spool is configured to rotate about a first axis in a first rotational direction to wind the at least one tension line around the spool, and wherein the spool is further configured to rotate about the first axis in a second rotational direction opposite the first rotational direction to unwind the at least one tension line from the spool; a first socket pivotally coupled to the housing and configured to rotate about a second axis, wherein the first socket is selectively coupled to the spool to drive rotation of the spool in the first rotational direction, wherein the first socket is configured to removably connect and disconnect to a first tool configured to rotate the first socket when connected to the first socket; and a release mechanism that is configured to selectively release the spool such that the spool is free to rotate in either the first rotational direction or the second rotational direction in response to manual forces applied to the release mechanism.
2. The adjustment device according to claim 1, wherein the release mechanism is configured to release the spool in response to a manual force applied in a direction parallel to the first or second axes.
3. The adjustment device according to claim 1, wherein the release mechanism is configured to release the spool in response to a force applied by the first tool in response to connection of the first tool to the first socket.
4. The adjustment device according to claim 1, wherein the housing includes a base having a lower surface extending in a plane and a cover coupled to the base and surrounding the spool.
5. The adjustment device according to claim 4, wherein the first axis is perpendicular to the plane of the lower surface of the base.
6. The adjustment device according to claim 1, wherein the second axis is parallel to the first axis.
7. The adjustment device according to claim 1, wherein the second axis is coaxial with the first axis.
8. The adjustment device according to claim 1, further comprising: a ratcheting adjustment mechanism supported by the housing, wherein the ratcheting adjustment mechanism includes a first engagement member that is selectively coupled to the spool, wherein the first engagement member has a coupled configuration that permits the spool to rotate in the first rotational direction while preventing the spool from rotating in the second rotational direction, and wherein the first engagement member has a decoupled configuration that that mechanically decouples the first engagement member from the spool.
9. The adjustment device according to claim 8, wherein the ratcheting adjustment mechanism further includes a second engagement member that is operably coupled between the first socket and the spool, wherein the second engagement member has a coupled configuration that mechanically couples the first socket to the spool such that pivoting motion of the first socket drives the spool in the first rotational direction and prevents the spool from rotating in the second rotational direction, and wherein the second engagement member has a decoupled configuration that mechanically decouples the first socket from the spool, wherein the release mechanism is configured to selectively release the spool by simultaneously configuring the first and second engagement members into their respective decoupled configurations.
10. The adjustment device according to claim 9, wherein the first socket is configured to translate relative to the housing and the spool in a first longitudinal direction parallel to the first axis to configure the second engagement member into its decoupled configuration; wherein the release mechanism includes a biasing member between the spool and the first socket that is configured to bias the first socket in a second longitudinal direction opposite the first longitudinal direction.
11. The adjustment device according to claim 1, wherein the release mechanism is configured for engagement with the first socket in a first configuration and is configured to be disengaged with the first socket in a second configuration, wherein in the first configuration the spool is prevented from rotating in either the first or second rotational directions and in the second configuration the spool is free to rotate in the first or second rotational directions.
12. The adjustment device according to claim 11, wherein the release mechanism includes a retainer configured for extension into the first socket in the first configuration and configured for displacement out of the first socket in the second configuration.
13. The adjustment device according to claim 12, wherein the retainer is configured to be displaced out of the socket in response to insertion of the first tool into the first socket and is configured to extend into the socket in response to withdrawal of the first tool from the first socket.
14. The adjustment device according to claim 8, wherein the first engagement member is pivotally coupled to the housing and configured to rotate about a third axis.
15. The adjustment device according to claim 14, wherein first engagement member is pivotally coupled to a second socket separate and distinct from the first socket, wherein the second socket is configured to receive a tool to rotate the second socket and the first engagement member to configure the first engagement member into its decoupled configuration.
16. The adjustment device according to claim 1, wherein the spool has an axle having an oval profile.
17. The adjustment device according to claim 1, wherein the housing includes a base and a cover coupled to the base surrounding the spool, wherein the base has a mounting flange for mounting the adjustment device to a substrate and wherein the mounting flange is configured to be sewn to the substrate, to be connected to the substrate with snap-fit connection, or be connected to the substrate with adhesive.
18. The adjustment device according to claim 1, further comprising: a rotary dial rotationally fixed to the first tool socket and configured for rotation about the first axis, the rotary dial configured to be rotated manually without the first tool.
19. A system comprising: an adjustment device according to claim 1; and at least one flexible elongate tension line connected to the spool.
20. The system according to claim 19, wherein: the tension line is a flat strap, a cable, or a lace.
21. A method of winding a tension line comprising: providing a tool-operated adjustment device according to claim 1; connecting the first tool to the first socket; pivoting the first tool about the second axis to drive the spool in the first rotational direction; and disconnecting the first tool from the first socket.
22. The method according to claim 21, further comprising: pivoting the first tool about the second axis to drive the spool in the second rotational direction.
23. The method according to claim 21, further comprising: applying manual forces to the release mechanism to release the spool to permit the spool to rotate in the second rotational direction.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0048] FIG. 1 is a top and side perspective view of an embodiment of an adjustment device in accordance with an aspect of the disclosure.
[0049] FIG. 2 is a top view of the adjustment device of FIG. 1
[0050] FIG. 3 is a side elevation view of the adjustment device of FIG. 1
[0051] FIG. 4 is an exploded view of the adjustment device of FIG. 1, viewed from the top and side of the device.
[0052] FIG. 5 is an exploded view of the adjustment device of FIG. 1, viewed from the side and bottom of the device.
[0053] FIG. 6 is a view of the device of FIG. 1 along line 6-6 in FIG. 2.
[0054] FIG. 7 is a view of the device of FIG. 1 along line 7-7 in FIG. 3.
[0055] FIG. 8 is a view of the device in FIG. 7 with two elongate members connected to the axle of the spool before winding the elongate elements.
[0056] FIG. 9 shows the device of FIG. 8 after the spool is rotated a number of revolutions.
[0057] FIG. 10 shows the device of FIG. 9 viewed along line 10-10 in FIG. 9.
[0058] FIG. 11 shows the device of FIG. 10 upon pushing a retainer in a direction of the arrow shown.
[0059] FIG. 12 shows the device in FIG. 6 with a tool inserted into a tool port of the device.
[0060] FIG. 13 is an elevation view of the device and tool of FIG. 12 after the tool is rotated ninety degrees with respect to the position shown in FIG. 12.
[0061] FIG. 14 is a top and side perspective view of another embodiment of an adjustment device.
[0062] FIG. 15 is a side elevation view of the adjustment device of FIG. 14.
[0063] FIG. 16 is an exploded view of the adjustment device of FIG. 14 viewed from a top and side of the device.
[0064] FIG. 17 is an exploded view of the adjustment device of FIG. 14 viewed from a bottom and side of the device.
[0065] FIG. 18 is a view of the device of FIG. 14 along line 18-18 when the retainer is in a first engaged position with the spool.
[0066] FIG. 19 is a view of the device of FIG. 14 along line 18-18 when the retainer is in a second disengaged position with the spool.
[0067] FIG. 20 is a top and side perspective view of another embodiment of an adjustment device.
[0068] FIG. 21 is a top view of the adjustment device of FIG. 20 with the cover shown as being transparent to show details within the housing.
[0069] FIG. 22 is a side elevation view of the device of FIG. 20 with the cover shown as being transparent to show details within the housing.
[0070] FIG. 21A shows the device in FIG. 21 connected to a flexible elongate tension line forming a fit system or tension line system in accordance with an aspect of the disclosure.
[0071] FIG. 22A shows the device in FIG. 22 with the tension line in FIG. 21A.
[0072] FIG. 23A is a top view of another embodiment of an adjustment device.
[0073] FIG. 23B is a top view of the adjustment device of FIG. 22C with a cover removed.
[0074] FIG. 23C is a transparent side view of the adjustment device of FIG. 22C.
[0075] FIG. 24A is a schematic transparent top view of a top view of another embodiment of an adjustment device, shown attached to an article.
[0076] FIG. 24B is a diametric cross section view through the adjustment device of FIG. 24A, shown attached to an article.
[0077] FIG. 25 is a front, top, and side perspective view of another embodiment of an adjustment device.
[0078] FIG. 26 is a rear, bottom, and side perspective view of the adjustment device of FIG. 23.
[0079] FIG. 27 is a side elevation view of the device of FIG. 26.
[0080] FIG. 28 is an exploded view of the device of FIG. 25.
[0081] FIG. 29 is an exploded view of the device of FIG. 26.
[0082] FIG. 30 is a side elevation view of the device of FIGS. 25 and 26 with a release button shows pushed in a release position.
[0083] FIG. 31 shows a view of the device of FIGS. 25 and 26 along line 31-31 in FIG. 30.
[0084] FIG. 32 is a side elevation view of the device of FIGS. 25 and 26 with the release button shown in an extended, unreleased position.
[0085] FIG. 33 is a perspective view of the device of FIGS. 25 and 26, having a section taken along line 33-33 in FIG. 31 to show ratchet disk engaged with inner teeth of a shaft coupler.
[0086] FIG. 34A is front perspective view of a modified version of the adjustment device of FIG. 25-33.
[0087] FIG. 34B is rear perspective view of the adjustment device of FIG. 34A.
[0088] FIG. 34C is a top perspective view of the adjustment device of FIG. 34A showing a removable cap displaced from over an accessory drive gear.
[0089] FIG. 34D is an assembly view of the adjustment device of FIG. 34A with a supplemental ratcheting assembly.
[0090] FIG. 34E is an assembled view of the adjustment device of FIG. 34A with a supplemental ratcheting assembly and the front wall of the ratcheting assembly shown in longitudinal section.
[0091] FIG. 34F is a section view through line 34F-34F in FIG. 34E and showing the adjustment device winding an elongate flexible member.
[0092] FIG. 35 is a side elevation view of another embodiment of an adjustment device.
[0093] FIG. 36 is a section view of the device in FIG. 35 taken along line 36-36 in FIG. 35.
[0094] FIG. 37 is a front elevation view of the device of FIG. 35.
[0095] FIG. 38 is a section view of the device of FIG. 35 taken along line 37-37 in FIG. 36.
[0096] Prior Art FIG. 39A shows schematic prior art tension devices and fit systems connected to a human body.
[0097] FIG. 39B shows schematic exemplary fit systems using tension devices in accordance with the disclosure connected to a human body.
[0098] FIGS. 40-66 shows schematic representations of fit systems and line tensioning systems in accordance with the disclosure used in various fields of use.
DETAILED DESCRIPTION
[0099] The present disclosure describes a number of embodiments of adjustment devices that employ a spool that interfaces to and supports at least one tension line. Thus, while some embodiments of the adjustment devices have been shown without connection to a tension line, all of the adjustment devices can be used with one or more tension lines. Note that each one the adjustment devices can be part of a fit system or a line tensioning system as described herein.
[0100] As used herein, a “tension line” refers to a flexible elongate member that can be gathered and wound onto a spool and unwound therefrom. The material of the tension line can be inelastic in nature or possibly have some elasticity. The tension line can be a cord, rope, cable, filament, or lace having a generally round profile, as well as flat straps having rectangular or square profiles. The material of the tension line can be any material typically used as a tension line in the same application. Thus, for a footwear application, the tension line used by the adjustment device in accordance with this description may be made from the same material currently in use for shoelaces. Also, the materials used may differ from those typically used for the application. The materials used for the tension line can include metal (e.g., steel) cable, and polyester webbing.
[0101] As used herein, a “fit system” refers to an adjustment device connected to a wearable article with at least one tension line (flexible elongate members such as straps, cables, wires, etc.) with one or more attachment points or interfaces to the article or device.
[0102] As used herein, a “line tensioning system” refers to an adjustment device connected to a non-wearable article or structure with at least one tension line (flexible elongate members such as straps, cables, wires, etc.) with one or more attachment points or interfaces to the article, device, or structure. Similar to fit systems, the attachment points or interfaces may decrease in distance relative to one another or relative to the line tensioning system, which can be referred to as contraction or shortening. The adjustment devices used in line tensioning systems may operate in space without being directly mounted to an article or structure.
[0103] FIGS. 1 to 13 show details of a first embodiment of an adjustment device 100 in accordance with an aspect of the disclosure. The device 100 is intended to be used with at least one a tension line that can be wound and collected by the device 100 and unwound and dispensed therefrom. FIGS. 1 to 3 show the device 100 assembled from its component parts shown in exploded views in FIGS. 4 and 5.
[0104] The device 100 includes a housing 10 that includes a base 12 and a removable cover 14. The housing 10 surrounds a spool 16, shown in greater detail in FIGS. 4 and 5. The base 12 defines a plurality of holes 12a through which the flexible elongate member 20 (FIGS. 8 and 9) can extend to connect to an axle 16a of the spool 16.
[0105] The base 12 has a mounting flange 12b that define notches 12c that can provide an anti-rotation feature for the device 10. For example, the mounting flange 12b may be received into a molded or otherwise formed material 702 of a wearable article, such as a prosthetic socket 700 (shown in FIGS. 10-11 and 40-42) such that the formed material secures the mounting flange 12b and protrudes into the notches 12c to prevent rotation of the flange 12b relative to the article.
[0106] The cover 14 defines a central opening 14a. The opening 14a is coaxial with a central longitudinal axis A-A of the device 100. The central opening is shown as being a hexagonal opening, the shape of the opening defined in cross-section to the longitudinal axis. As shown in FIGS. 4 and 5, the base 12 has threads 12d that mate with threads 14b of the cover 14 to form a removable threaded connection between the cover 14 and the base 12. The cover 14 can be disconnected from the base to permit a user to access the spool 16 and tension line in the housing. A hex tool mating with the hexagonal opening 14a can be used to rotate the cover 14 relative to the base 12 to remove or reattach the cover 14 to the base 12.
[0107] Turning to FIGS. 4 and 5, the spool 16 is received and surrounded in the housing 10. The spool is coaxially aligned with the cover 14 and the base 12. The spool has an upper flange 16b and a lower flange 16c connected to ends of the axle 16a, which is hollow in the example to receive a sliding retainer 17, further details of which are described below.
[0108] The upper flange 16b defines a central opening 16d aligned with the opening 14a in the cover 14. The central opening 16d is shown as being a hexagonal opening having a smaller diameter than the opening 14a. The central opening 16d leads into an upper end of a tool socket 18 that extends axially along axis A-A from the upper flange 16b to a shoulder 16a2 extending from an inner surface 16a1 of the axle 16a. The socket 18 is configured to receive a mating tool 130 (FIG. 12). The socket 18 is configured to prevent relative rotation between the socket 18 and the tool 130 relative to axis A-A. Specifically, in the example shown, the socket 18 is defined as a six-sided bore 18a that is configured to receive a six-sided tool, such as an end of a hex key 130 shown in FIG. 12.
[0109] Also, the interior of the axle 16a and the socket 18 are in communication with one another and are configured to receive a retainer 17 and to prevent relative rotation between the retainer 17 and the spool 16. The retainer 17 includes a lower base 17a and an upper protrusion 17b configured to be received in and mate with the bore 18a of the socket 18 from a lower end of the socket 18 to prevent relative rotation between the retainer 17 and the spool 16. In the example shown, the upper protrusion 17b of the retainer 17 has a hexagonal profile that is configured for axial reception along axis A-A into and out of the lower end of the bore 18a of the socket 18. The base 17a of the retainer 17 is configured to engage the shoulder 16a2 which provides a positive stop to axial movement of the retainer 17 into the bore 18a of the socket 18.
[0110] The retainer 17 also defines a central bore 17c (FIG. 5) extending axially along axis A-A from a lower side of the base 17a. In the example shown, the central bore 17c has a hexagonal profile to receive and mate with a hexagonal central post 15 (FIG. 4) extending axially along axis A-A and fixed to an upper surface of the mounting flange 12b on the inside of the housing 10. The engagement between the retainer 17 and the post 15 prevent relative rotation therebetween but permits the retainer 17 to translate along axis A-A relative to the post 15.
[0111] The retainer 17 is biased axially along A-A towards the upper flange 16b of the spool 16 with a biasing member 19, shown as a spring. As shown in FIGS. 6 and 10, when the bore 18a aligns with the protrusion 17b of the retainer 17 and no tool is inserted into the bore 18a of the socket 18, the retainer 17 is pushed upward into the bore 18a in an engaged configuration, thereby preventing the spool 16 from rotating relative to the retainer 17. Moreover, when the retainer 17 is in the engaged configuration with the spool 16, the retainer 17 remains rotationally fixed to the post 15. Thus, when the retainer 17 is in the engaged configuration with the socket 18, the spool 16 is rotationally locked relative to the housing 10.
[0112] As shown in FIG. 12, the retainer 17 is configured to be disengaged from the spool 16 by inserting a tool 130 through holes 14a and 16d into the bore 18a of the socket 18 to translate the retainer 17 axially along A-A in the downward direction of the arrow B shown in FIGS. 11, 12, and 13. Once the retainer 17 is displaced completely below the shoulder 16a2, the spool 16 is rotationally disengaged from the retainer 17 so that the spool 16 can be rotated relative to the housing 10 about A-A using the tool 130, as shown in FIG. 13. The spool 16 can be rotated in either of the directions shown by arrows C and D in FIG. 12.
[0113] When a user is finished rotating the spool 16 in either directions C or D, the user can align the bore 18a with the retainer 17 so that the tool 130 can be withdrawn from the bore 18a in a direction opposite arrow B in FIG. 13 while the retainer 17 seamlessly is reinserted into and engages the bore 18a to retain tension in the elongate member and prevent the elongate member from unwinding.
[0114] FIG. 8 shows ends of a tension line 20 connected to the axle 16a of the spool 16 and where the tension line 20 is not wound around the axle 16a of the spool 16. FIG. 9 shows the tension line 20 collected in the housing and wound around the axle 16a of the spool 16. FIG. 10 shows the device of FIG. 9 with the wound tension line 20 and with the retainer 17 in its engaged configuration. With the retainer 17 in the engaged configuration, the spool 16 is rotationally locked relative to the housing 10 so that any tension in the tension line 20 cannot cause the tension line 20 to be unwound by rotation of the spool 16 in an unwinding direction. However, as shown in FIG. 11, a user can reconfigure the retainer 17 by inserting the tool 130 to displace the retainer 17 from the bore 18a to disengage the retainer 17 from the spool 16, which can then permit the user to rotate the spool 16 to unwind the tension line 20 fully as shown in FIGS. 8 and 11.
[0115] The user can be guided in aligning the bore 18a into the engagement position with the retainer 17 as follows. The base 12 includes a plurality of circumferentially spaced protrusions 13. The lower flange 16c of the spool 16 defines a plurality of notches or grooves 16c1 that are configured to mate with the protrusions 13 when the retainer 17 is aligned with the bore 18a of the socket 18 (FIG. 7). When the user rotates the spool 16 with the tool 130, the engagement of the notches 16c1 and protrusions 13 provides haptic feedback to the user which can be felt in the hand of the user through the tool 130. The haptic feedback can be used as an indicator to the user that the retainer 17 is in the engaged configuration and that the tool 130 can be removed from the socket 18 without loss of tension in the tension line 20.
[0116] As shown most clearly in FIG. 7, the spool axle 16a has a generally oval cross-sectional shape. The oval shape increases the capstan effect or spool's ability to transfer and maintain tension forces. Also, the axle 16a defines diametrically opposed through holes 16e, each of which is surrounded by a rounded or filleted rim 16f for strain relief of the elongate member that are configured to extend through the holes. The holes 16e may be blind holes to retain a terminated end (e.g., an enlarged or flared end of the elongate member). In other embodiments, the elongate member may extend diametrically through the axle without terminating its ends at the axle 16a. Also, FIGS. 8 and 9 show the gradual bend of the elongate member 20 around the curved surface 16f that can provide a strain relief to prevent damage to the elongate member 20. The inner edges 12a1 (FIG. 8) of the holes 12a may also be rounded to protect the elongate member from abrasion and wear.
[0117] FIGS. 8 and 9 also show a collection volume 21 and a pathway between the spool 16 and the inner surface of the housing 10. The collection volume 21 is defined as the space between the spool 16 and the interior surfaces of the housing 10. As shown in FIGS. 8 and 9, as the tension line 20 is collected, the collection volume 21 is filled with the tension line. Eventually, if the entire collection volume 21 is filled with the tension line 20, the spool 16 cannot rotate any farther to collect additional tension line 20.
[0118] In FIGS. 10 and 11 the adjustment device 100 is seated or otherwise embedded in a material 22, which can be part of an article or may itself be a mounting member of the device 100 that can be attached to an article 102, as shown in FIG. 10. The material 22 may be molded around the housing 10. In the example shown, a portion of the base 12 below the cap 14 is surrounded by the material 22. Two cable routing passageways 23 are integrated into the material 22 and are in communication with the holes 12a. The passageways 23 are lined with a cable housing 24. Each cable housing 24 has an inner end (relative to the axis A-A) that is received in a bore 12a2 formed in the outer side of the base 12. Each bore 12a2 aligns with a corresponding hole 12a. The passageways and cable housings 23 and 24 extend outwardly (with respect to axis A-A) to outer ends from which the elongate member extends without being surrounded by the material 22 or cable housings 24.
[0119] FIGS. 14 to 19 show details of a second embodiment of an adjustment device 200. In FIGS. 14 to 19 elements corresponding to those of device 100 are shown incremented by “100”. The main differences between device 100 and device 200 lie in the construction of the spool 116, retainer 117, and posts 115. The spool 116 includes a socket 118 with a central bore 118a. As shown in detail in FIG. 17, a plurality of teeth 136 extend along an inner surface of the axle 116a around the socket 118.
[0120] The retainer 117 is shown as a central hub 117b surrounded by an annular rim 117a. Four radially extending teeth 126 extend from the annular rim 117a. The rim 117a is spaced radially from the hub 117b by an annular groove 117c that is configured to receive a lower end of the socket 118 when the retainer 117 is engaged with the spool 116. The teeth 126 are spaced 90 degrees around a perimeter of the rim 117b. The teeth 126 are configured to engage the teeth 136 of the spool 116 when the retainer 117 is in an engaged configuration with the spool 116, as shown in FIG. 18.
[0121] The retainer 117 has a central blind hole 117c that is configured to retain a biasing member 119, which urges the retainer axially along B-B towards the socket 118. A central post 115 extends along axis B-B and is configured to support spring 119 and be received in the blind hole 117c.
[0122] The retainer 117 defines four axially extending through holes 125 that are configured to receive and slide on four corresponding posts 115a arranged around central post 115. The posts 115a extend from the base 112 parallel to axis B-B (FIG. 15) and are arranged in a generally square pattern around the central post 115. Each post 115a extends through a corresponding spring 119a. Each spring 119a and 119 biases the retainer 117 upward towards the socket 118. The arrangement of the four posts 115a prevent relative rotation between the retainer 117 and the base 112. The four posts 115a are longer than the central post 115b. The retainer 117 is configured to slide axially (parallel to B-B) along posts 115a and 115b between an engaged position and a disengaged position. The springs 119a and 119b urge the retainer 117 upward towards the teeth of the spool. The teeth of the retainer are configured to engage the teeth of the spool when the notches 116c1 on the lower flange 116c of the spool mate with protrusions 113 of the base 112. When such alignment occurs, the retainer 117 can engage the teeth 136 of the spool 116, as shown in FIG. 18. In an engaged configuration, the teeth 126 of the retainer 117 are coupled to the teeth 136 of the spool 116, the retainer 117 is coupled to the posts 115a, and the spool 116 is rotationally locked and cannot rotate relative to the housing 110 about axis B-B.
[0123] Upon insertion of a tool, such as tool 130, into the bore 118a of the socket 118, the retainer 117 can be translated along axis B-B down and out of engagement with the teeth 136 of the spool 116, as shown in FIG. 19. Once the teeth 126 of the retainer 117 are disengaged from the teeth 136 of the spool 116, the spool 116 can be rotated in either rotational direction about axis B-B, and perpendicular to the base of the housing, by applying a rotational force to the tool.
[0124] The spool 116 has a lower flange 116c having a plurality of notches 116c1. Twenty notches 116c1 are shown in the example embodiment that are spaced equally 18 degrees apart; thus, the spool 116 can be rotated in increments of 18 degrees. As such, the spool has defined stops that incrementally limit the smallest degree by which it can be rotated before the tool can be removed. Different increments can be similarly implemented by changing the rotational spacing of the notches 116c1. Alternatively, the stops can be eliminated from the device.
[0125] FIGS. 20 to 22 show details of a third embodiment of a tool operated adjustment device 300. In FIGS. 20 to 22, elements corresponding to those of device 200 are incremented by 100. The device 300 includes the same structure as the device 200 with the following exceptions. The device 300 includes a spool 216 with an upper flange 216b that has sloped gear teeth 216b1 along its outer perimeter. The spool 216 has an axle 216a that extends along axis C-C. The spool 216 is configured to rotate about axis C-C. Also, the device 300 includes a housing 210 with a cover 214 that defines an opening 214a that leads to a tool socket 218 for receiving a tool for winding the spool 216. As shown in FIGS. 21A and 22A, the spool 216 has diametrically opposed holes 216e to connect to tension line 260 routed through openings 212a in the base 212 of the housing 210. The device 300, however, does not include a retainer, like retainer 117, to rotationally lock the spool relative to the housing.
[0126] Instead, the device 300 includes a ratcheting pawl mechanism 240 that is housed in the housing 210 and is pivotally coupled to the housing about an axis D-D, which is spaced from axis C-C of the axle 216a. The mechanism 240 is operably configurable between a first configuration in which the mechanism 240 permits one way rotation of the spool 216 in a first direction (clockwise in FIG. 21) and blocks rotation of the spool 216 in a second direction (counterclockwise in FIG. 21), and a second configuration in which the mechanism 240 permits the spool 216 to rotate freely in both the first and second directions. The ratcheting pawl mechanism 240 is thus capable of maintaining tension in the tension line 260 when the tool is withdrawn from the socket 218.
[0127] The ratcheting pawl mechanism 240 includes a pawl 241 pivotally coupled to and supported by the housing 210. The pawl 241 is resiliently biased (i.e., with a spring 242) in an engagement configuration in which the pawl 241 is engaged with the teeth 216b1 of the gear 216b to permit rotation of the gear 216b, and thus the entire spool 216, in the first rotational direction (clockwise in FIG. 21), while preventing rotation of the spool 216 in the second rotational direction (counterclockwise in FIG. 21).
[0128] The pawl 241 is connected to a socket 218c that is accessible through an aligned hole 214c in the cover 214 of the housing 210. The socket 218c is configured to receive a tool, which is preferably the same tool used in socket 218. The socket 218c is rotationally fixed to the pawl 241 so that rotation of the socket 218c using the tool can cause corresponding rotation of the pawl 241 about its axis of rotation D-D. In the example shown in FIG. 21, a user wishing to disengage the pawl 241 from the gear 216b, such as for reducing tension in a tension line wound around an axle 216a of the spool 216, can insert a tool into the second socket 218c and rotate the tool counterclockwise in FIG. 21. Once the pawl 241 is disengaged, either the inherent tension in the tension line 260 will cause extension of the tension line 260 to reduce tension and rotated the spool 216 in the second direction, or the user can use a second tool in the socket 218 to rotate the spool 216 in the second direction. The user can choose to loosen the tension line 260 by turning the tool in the second socket 218c in the counterclockwise direction briefly then can turn the tool back in the clockwise direction to re-engage the pawl 241 with the teeth 216b1 for partial or incremental release. Alternatively, the user can turn the tool in the counterclockwise direction and leave it turned away until tension is fully released.
[0129] Turning now to FIGS. 23C-23E, another embodiment of a tool operated adjustment device 2000 is shown. The device 2000 includes a housing with a spool 2016 having an axle 2016a, as well as a spring-biased pawl 2041, as previously described with respect to device 300. Distinctions in adjustment device 2000 from device 300 include the following. The device 2000 includes a drive gear 2070 mounted on a parallel axle 2074 to axle 2016a, and the spool 2016 is rotationally fixed relative to a driven gear 2072 meshing with the drive gear 2070. The drive gear 2072 includes a control port 2018 for receiving the tool. When the pawl is released (discussed below) and the tool is rotated, the drive gear drives rotation of the driven gear and the spool.
[0130] In this exemplar embodiment shown, the drive gear 2070 has twice as many gear teeth as the driven gear such that the drive gear can drive the rotation of the spool in a 2:1 ratio. Any other suitable ratio can be provided between the gears. Alternatively, the drive gear 2070 can have fewer teeth to provide gear reduction and resulting finer adjustment of the driven gear. Such gear transmissions described in this embodiment are intended for application within any of the device within the scope of adjustment devices described herein.
[0131] In addition, in distinction from adjustment device 300, the spring-biased pawl of device 2000 engages the drive gear 2070. The pawl 2041 is manually releasable by rotating a portion of the pawl or knob 2076 connected thereto extending through the upper end of the cover 2014 such that only a single tool is required to operate the device. Such pawl release mechanism may be similarly used in association with device 300. The pawl 2041 is operably configurable between a first configuration in which the mechanism permits one way rotation of the spool 2016 in a first direction and blocks rotation of the spool 2016 in a second direction, a second configuration in which the mechanism permits one way rotation of the spool 2016 in the opposite direction as the first configuration and blocks rotation of the spool 2016 in the opposite direction as the first configuration, and a third configuration in which the mechanism permits the spool 2016 to rotate freely in both the first and second directions.
[0132] Referring now to FIGS. 24A and 24B, another embodiment of a tool operated adjustment device 2100 is shown. The device 2100 includes a housing 2110 with a spool 2116 provided with an axle 2116a. The housing 2110 includes an interior ring of gear teeth 2180. A central star gear 2182 is coaxially situated over the spool 2116. A central control port 2118 is provided in the upper end of the housing 2110 and into the star gear 2182. A carrier plate 2184 is rotationally coupled with the spool 2116. A set of three planet gears 2186 are rotatably mounted on pins on the carrier plate 2184 in an equidistantly spaced relationship. The planet gears 2186 are engaged with the gear teeth 2180 of the housing and the star gear 2182. Three pawls 2188 are radially arranged on the retainer plate 2184 between the planetary gears 2186 and include a first portion 2188a for engagement with the star gear 2182 and second portion 2188b defining a camming ramp that extends within the control port 2118. The pawls 2188 are provided with a compression spring 2190 to bias the first portion 2188a to interfere with the star gear 2182 and prevent rotation of the planetary gears 2186 when no tool is present in the control port 2118. When the tool is inserted into the control port 2118, the tool forces against the camming ramps 2188b of the pawls to displace the second portion of the pawls away out of interference with the star gear 2182 so that the planetary gears 2186 can rotate and allow the spool 2116 to wind within the housing 2114. The planetary gear system provides mechanical advantage to the system. The planetary gear system described in this embodiment is intended for application within any device within the scope of adjustment devices described herein.
[0133] FIGS. 25 to 31 shows details of a fourth embodiment of a tool operated adjustment device 400. The adjustment device 400 is configured for use with a tension line strap (not shown). The device 400 includes a generally cylindrical housing 410 that extends along a central longitudinal axis E-E from a first base end 410a to a second upper end 410b. The housing 410 defines two diametrically opposite elongated tension line slots 412 through which tension line straps can extend into and out of the housing 410.
[0134] A tool socket 414 is located at a first end 410a of the housing for rotating a spool 424 (FIGS. 28 and 29) (aligned with the slots 412) housed inside the housing 410. The first end 410a of the housing 410 is connected to a retaining ring with a threaded connection. The retaining ring 413 retains the tool socket element 414 at the first end 410a of the housing 410. A release button 416 is located at the second end 410b of the housing 410 that is opposite the first end 410a of the housing 410. The button 416 is configured to translate axially relative to the housing 410 along axis E-E, but the button 416 cannot rotate relative to the housing 410 due to the interlocking shape of the button 416 and the hole in the second end 410b of the housing 410 that the button 416 extends through. The release button 416 is biased outwardly with respect to the second end 410b of the housing 410. A cover 418 is pivotally connected to the second end 410b of the housing 410 and is configured to rotate about axis E-E parallel to central longitudinal axis E-E. When the button is not in use, the cover can be rotated over the button to conceal and protect the button from inadvertent actuation. When the button 416 is to be used, the cover 418 can be rotated about axis E-E to reveal the button, as shown in FIGS. 24 and 30.
[0135] The body 410 includes a tool holder 420 that extends from an elongate outer side of the housing 410. The tool holder 420 retains a tool 422 that is receivable in the tool socket 414. The tool 422 shown is a hex key.
[0136] FIGS. 26, 27, and 29 show additional details of the spool 424 and ratcheting release mechanism 426 housed inside the housing 410. The spool 424 includes a first flange 415, a second flange 417, and two elongated members 419 rigidly connected at their ends to the first and second flanges 415, 417. The tool socket 414 is rotationally fixed to the first flange 415 of the spool 424. In the embodiment, the first flange 415 is integrally formed with the tool socket 414, though this is not a requirement. The flanges 415 and 417 connect to the elongated members 419 so that there is an elongated gap 419a between the elongated members to receive and retain a tension line strap. The elongated members 419 have an overall oval profile for at least the same reasons as the oval profile of the axle 16a of device 100 described herein. The entire spool 424 is configured to rotated in unison about axis E-E.
[0137] The second flange 417 of the spool is configured to connect to the ratcheting release mechanism 426. Specifically, notches 417a are formed along a peripheral edge of the second flange 417. The notches are configured to engage pins 421 that rotationally couple the second flange 417 to the ratcheting release mechanism 426 as described in greater detail below.
[0138] The ratcheting release mechanism 426 includes a shaft coupler 423, a ratcheting disc 425, the release button 416, a spring 427, and a spring retainer 429. The shaft coupler 423 is an annular member having an inner cylindrical surface defining an interior space and an outer cylindrical surface that is configured to rotate in unison with the spool 424 about inner surface of the housing 410. As shown in greater detail in FIG. 31, the second flange 417 of the spool 424 is received and seated in an inner side (relative to central axis F-F) of the interior space of the shaft coupler 423. The second flange 417 is pivotally fixed to the shaft coupler 423 with the pins 421 so that the entire spool 424 and shaft coupler 423 rotate about axis E-E in unison (FIGS. 25 and 27).
[0139] The spring 427, spring retainer 429, and ratcheting disc 425 are also disposed in the interior space of the coupler 423. The spring 427 is positioned between the second flange 417 of the spool 424 and the spring retainer 429. The ratchet disc 425 is positioned between the spring retainer 429 and the push button 416. The push button has pins 416a that extend through the ratchet disc 425 and spring retainer 429 to rotationally fix them all to one another so they all remain rotationally fixed together and thus remain rotationally fixed relative to the housing 410 due to the fact that the button 416 is rotationally fixed relative to the housing 410.
[0140] The ratchet disc 425, spring retainer 429, and push button 416 are configured to translate along axis E-E within the interior space of the shaft coupler 423. The spring 427 biases the ratchet disc 425, spring retainer 429, and push button 416 outward (relative to axis F-F). The inner cylindrical surface of the outer side (relative to the axis F-F) of the coupler 423 has inner teeth 423a that are configured to engage ratchet pawls 425a of the ratchet disc 425 when the push button 416 is in a first configuration in which the button extends outward from the second end 410b of the housing 410, as shown in FIGS. 32 and 33. FIG. 33 shows ratchet disc 425 engaged with the inner teeth 423a of the shaft coupler 423. When the button 416 is pressed inward toward axis F-F, as shown in FIGS. 30 and 31, the ratchet disc 425 is translated inwardly against the bias of the spring 427 (which is compressed), which disengages the ratchet pawls 425a from the inner teeth 423a of the shaft coupler 423. When the pawls 425a of the ratchet disc 425 are disengaged from the inner teeth 423a, the user can rotate the spool 424 in either the first or the second direction about the axis E-E directly using the tool 422 in the tool socket 414. Also, if tension has been built up in a tension line connected to the spool 424, pressing on the release button 416 will cause the spool 424 to unwind in the second rotational direction about axis E-E to reduce tension in the tension line.
[0141] The pawls 425a of the ratchet disc 425, when engaged with the inner teeth 423a of the coupler 423, permit the spool 424 to rotate in a first rotational direction about axis E-E when the socket 414 is rotated using the tool 422, while preventing the spool 424 from rotating in a second rotational direction opposite the first direction. When the tool is released or withdrawn from the tool socket 414, the pawls 425a retain tension in the tension line. The tension can be released by disengaging the pawls 425a from the inner teeth 423a of the shaft coupler 423 by pushing on the release button 416.
[0142] Turning now to FIGS. 34A-34C, a modification to the fourth embodiment is provided which facilitates collecting tension line at the exterior of the housing; i.e., to effectively make the housing of the adjustment device into a secondary spool. (The inner ratcheting assembly is the same as in adjustment device 400 and will not be further described here.) The modification adjustment device 400′ includes the following. As shown in FIGS. 34A-C, the adjustment device 400′ bolts together, defining lateral bosses 460′ on diametrically opposing sides of the housing 410′. Gear teeth 462′ are provided fixed to one end of the exterior of the housing 410′. A removable cap 464′ is provided that covers and exposes the gear teeth 462′.
[0143] Referring to FIGS. 34D-34F, a removable outer ratcheting assembly 470′ is provided for coupling with the adjustment device 400′. The ratcheting assembly 470′ includes first and second ratchet plates 472a′ and 472b′, a release handle 474′, a spring 476′, first and second pivot bars 478a′ and 478b′, and optionally a spacer 480′ with snap-fit receiver 482′ for a tool 402′. The adjustment device is assembled into recesses 484′, 486′ within the ratchet plates 472′ and spacer 480′, with the bosses 460′ registering in the recesses and fixing rotation of the device relative to the plates. The ratchet plates 472a′, 472b′ and handle 474′ are assembled about the adjustment device 400′ with screws 481′. The release handle 474′ extends in a u-shape into ratchet plates and includes a pawl 488′ at one end. The pawl 488′ is biased by the spring 476′ to interfere with the gear teeth 462′. Referring to FIG. 34F, while the pawl 488′ is engaged, as the inner ratcheting assembly is activated with the tool 402′ inserter and rotated within control port 418′ (FIG. 34E), the flexible elongate member 490′ is wound first about the interior spool 416′; then, once the interior spool is full, the elongate flexible member 490′ is wound about the exterior of the housing. The pivot bars 478a, 478b prevent unwinding of the flexible elongate member 490′. Pulling on the release handle 474′ relative to the ratchet plates 424a′ and 472b releases the pawl 488′ from interference with the gear teeth 462′ so that the ratchet assembly can rotate relative to the adjustment device and allow unwinding of the flexible elongate member 490′.
[0144] FIGS. 35 to 38 show details of a fifth embodiment of a tool operated adjustment device 500. The device 500 has substantially corresponding structure to device 400. One difference between device 500 and device 400 lies in the fact that the spool 516 of the device 500 is constructed to wind a tension line lace or cable rather than a strap. Thus, a smaller spool 516 is utilized. In addition, the housing 510 and entry/exit ports 530, 532 are correspondingly smaller as well, and a stitch flange 511 is provided to the housing for integration of the device into an article, such as soft goods or a textile-based application.
[0145] An addition feature of device 500 includes a dial 534 rotationally fixed relative to the spool 516 and accessible from outside the housing. The dial 532 allows a user to collect slack or loose cable or lace before a tool is inserted into the control port 514. The dial 532 offers minimal mechanical advantage, but allows the user to slide a finger, palm, or other surface across the dial to collect the loose lace then use the tool to increase the tension under the mechanical advantage of the tool (and/or any gears that may be integrated into the device, as described above).
[0146] Prior art FIG. 39A illustrates that prior art tensioning device that include an integrated line tensioner are bulky devices and protrude when applied to wearable articles on the human body. The larger profile of the prior art systems 610 and 611 can concentrate an impact force on the portion of the body to which the systems 610 and 611 are attached if a user falls or is impacted in that area of the user's body. In addition, the larger size can be aesthetically displeasing or unsuitable for certain wearable applications. By way of comparison, the adjustment devices 620 shown in FIG. 39B have a lower profile. This is permitted, at least in part, because they use a separable tool rather than a line tensioner having an integrated-force applier; thus, they can be made smaller in size and better integrated with wearable articles. Further, in the event of a fall, force on the wearer is minimized as a result of the smaller size. In addition, by requiring use of a separate tool for tension and/or release, they are optimized to prevent inadvertent adjustment.
[0147] FIGS. 40-68 show various uses of adjustment devices into various exemplar articles. Such articles include wearable articles, in which the adjustment device operates to facilitate the fit of the article; sporting articles requiring application of tension, and utility articles requiring application of tension. It will be appreciated that adjustment device 620 of the systems 640 may take the form of any of the embodiments of an adjustment device described herein and is not limited to the schematics shown in FIGS. 40-68. Furthermore, it is appreciated that the fields and applications shown and briefly described herein are not intended to be exhaustive or limiting but are merely examples.
[0148] FIGS. 40-42 shows fit systems 620 applied to a prosthetic socket 700. For the socket shown in FIGS. 40-42, an adjustment device 640 is coupled to the socket to apply or release tension on a cable 645 extending about all or a portion of a circumference of a prosthetic socket. For example, the device may be adjusted to tension the cable 645 to draw struts 648a, 648b, 648c, 648d of the socket radially inward or release tension to allow the struts to flex radially outward. Similarly, fit systems 620 could be applied to a prosthetic socket 700 to draw two sections or regions of the prosthetic socket 700 closer together or allow them to flex apart. Applying or relieving tension in the tension lines can enlarge or reduce the opening of the prosthetic or change the distribution of forces to adjust the fit of the prosthetic to a user. As shown in FIGS. 41 and 42, each system 620 shown in FIG. 40 includes one adjustment device 640 connected to the cable 645 banded about the prosthetic socket 700. As shown in FIG. 42, a tool 630 is required to adjust tension to prevent inadvertent adjustment or limit adjustment to a prosthetist.
[0149] Referring to FIG. 43, the adjustment device of the fit system may be mounted to the shell of the helmet 710 or may be left free to be positioned along the strap 650b′ at an intermediate position between the sides of the helmet.
[0150] Turning to FIG. 44, multiple fit systems 620 are connected to a ski boot 720. The straps are banded around a leg portion and a foot portion of the boot and the adjustment devices of the straps may be mounted directly to the leg and foot portions of the boot. FIG. 45 shows fit systems 620 connected to snowboard boots 730. Straps of the systems 620 are banded about the leg portion of the snowboard boots with the adjustment device 640 mounted directly to the boot. Also, straps of the fit system 620 are shown connected to the snowboard and include adjustment devices 640 mounted to the snowboard straps which can be used to adjust the connection of the snowboard boots to the snowboard. FIG. 46 shows a fit system 620 connected to a skate 740, specifically an ice skate. The adjustment device 640 of the fit system 620 is mounted directly to the skate while the tension line is banded about the skate.
[0151] FIG. 47 shows an embodiment of a fit system 620 connected to a sandal 750. The adjustment device 640 of the fit system 620 is mounted to one of the sandal straps while the tension line takes the place of a sandal closure strap. FIG. 48 shows a fit system 620 connected to a shoe 760. The adjustment device 640 of the system 620 is mounted to the shoe and the strap extends across the tongue of the shoe. FIG. 49 shows a fit system 620 connected to a boot 770, where the fit system is arranged identically to the system shown in FIG. 46 used with a skate 740. FIG. 50 shows a fit system 620 with an adjustment device that is embedded into an upper of a shoe 780 with laces partially concealed by the upper (shown in broken lines) and laces that are visible across a tongue of the shoe.
[0152] FIG. 51 shows an embodiment of a fit system 620 used for an adjustable strap of a day pack 790 application. The tension line of the system 620 is connected to the day pack and the adjustment device 640 is not directly mounted to the day pack, but is spaced therefrom. FIG. 52 shows a fit system 620 used for an adjustable strap of a bag or backpack 800 (e.g., a camping backpack). The tension line of the system 620 is connected to the backpack and the adjustment device 640 is not directly mounted to the backpack but is spaced therefrom.
[0153] FIGS. 53 and 54 show uses of line tensioning systems 620. FIG. 53 shows fit systems 620 used as straps of a suspended tent 810. Each strap is connected to a corresponding adjustment device 640. Each strap is configured to connect at one end to a tent and an opposite end to another structure (such as a tree) to suspend the tent above the ground. The line tensioning systems 620 may also be used for other suspension applications, such as mountaineering, rock-climbing, and rappelling. Similarly, the line tensioning system 620 may be used to tension sporting nets, such as for tennis, badminton, volleyball, table tennis, etc., and may be provided with the equipment therefor. FIG. 54 shows line tensioning systems 620 used as cargo tie down straps 820 connected to a truck bed. The line tensioning systems described herein can also be used as closures in carry-alls, suitcases, duffel bags, sport bags, and thus may be incorporated into such articles in accord with the intended scope herein.
[0154] FIGS. 55-59 show fit systems 620 applied to protectable wearable articles utilized in the field of motorsports. Specifically, FIG. 55 shows fit systems 620 applied to a protective vest 900 that can be used to adjust the fit of the vest to a user. FIG. 56 shows fit systems 620 applied to a protective suit 910. The fit systems can be used to adjust the fit of the protective suit to a user's body at the locations shown in FIG. 56. FIG. 57 shows a fit system 620 applied to a motorcycle boot 920. As shown in FIG. 57, two straps are banded about the boot: one strap banded about a leg portion of the boot and one strap banded about the foot. Separate adjustment devices 640 may be provided for each strap to independently tension each strap. FIG. 58 shows fit systems 620 applied to protective knee pads 930 where the strap is configured to be banded about the knee of a user and the adjustment device 640 can be used to adjust the fit of the straps. FIG. 59 shows a fit system 620 applied to protective pants 940 for adjusting the waist of the pants to fit a waist of a user.
[0155] FIG. 60 shows fit systems 620 applied to a prosthesis 1000 where the tension lines are straps banded about the socket of prosthesis. FIGS. 61-64 show various uses of the fits systems 620 in the field of orthotics (braces) for bracing bones and joints. FIG. 61 shows a fit system 620 utilized in an ankle orthosis 1010. As shown in FIG. 61, one strap is banded about a leg portion of the brace and one strap is banded about a foot portion of the brace. The adjustment device 640 of the fit system 620 is mounted to the device and controls tension in the two straps. FIG. 62 shows a fit system 620 applied to a back brace 1020 for thoracic lumbar sacral orthosis (TLSO) application. The strap of the system 620 is banded about the back and torso of the user and the adjustment device 640 is positioned over a user's chest for access to the user. FIG. 63 shows fit systems 620 applied to a knee brace 1030 or knee orthosis. One fit system is banded about the leg above the knee, while another fit system is banded about the leg below the knee. The adjustment devices 640 of the fit systems 620 can adjust tension in the straps to fit the straps to the user's leg. FIG. 64 shows fit systems 620 applied to a post-operative knee brace 1040 or knee immobilizer. The fit systems 620 are shown banded about the user's lower leg.
[0156] FIGS. 65 and 66 show fit systems 620 utilized in the field of clothing accessories and clothing. As shown in FIG. 65, the fit system 620 is used as a belt for a pair of pants, which may be integrated into the pants 1100. For example, the adjustment device 640 may be mounted to the pants with the strap of the fit system 620 banded about the waist of the pants. FIG. 66 shows the fit system 620 in the form of a belt 1110. Where the fit system 620 is worn about the body, it is preferred to incorporate a tension limiter. However, in certain applications where the fit system 620 is intended to apply tension around the body, such as a tourniquet, it will be appreciated that the tension device of the fit system 620 would omit a tension limiter.
[0157] There have been described and illustrated herein several embodiments of a tension device, fit systems using the tension device, and a method of using the tension devices and fit systems. While particular embodiments of the invention have been described, it is not intended that the invention be limited thereto, as it is intended that the invention be as broad in scope as the art will allow and that the specification be read likewise. Thus, with respect to any embodiment, where a hex-shaped control port or similar structure has been described and corresponding hex-shaped tool for insertion therein and operation on the adjustment device, it is appreciated and intended that the control port or similar structure and working end of the tool can be any cooperative shapes that permit application of a torque. Thus, by way of example only, they can both have cross-sectional shapes that are polygonal, both have interfering but different cross-sectional polygonal shapes, or even have shapes with a combination of curves and/or at flat, provided that both the port and tool are not completely circular. Further, while particular tension line types have been disclosed, it will be appreciated that other tension line types may be used as well. For all of the embodiments, the line tensioning systems may be made from a plastic, metal, or a combination plastic and metal components. In addition, while particular types of plastics have been disclosed for parts of the embodiments, it will be understood that other suitable types of plastics can be used. For example, and not by way of limitation, acrylic and polycarbonate may be used. Moreover, while particular configurations have been disclosed in reference to housings for the tension devices, it will be appreciated that other configurations could be used as well. It will therefore be appreciated by those skilled in the art that, yet other modifications could be made to the provided invention without deviating from its scope as claimed.
