WO2022020169A1 - Dispositif de tension et procédés associés - Google Patents

Dispositif de tension et procédés associés Download PDF

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Publication number
WO2022020169A1
WO2022020169A1 PCT/US2021/041782 US2021041782W WO2022020169A1 WO 2022020169 A1 WO2022020169 A1 WO 2022020169A1 US 2021041782 W US2021041782 W US 2021041782W WO 2022020169 A1 WO2022020169 A1 WO 2022020169A1
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WO
WIPO (PCT)
Prior art keywords
movable member
tension device
spool assembly
tension
spring
Prior art date
Application number
PCT/US2021/041782
Other languages
English (en)
Inventor
Timothy J. Higgins
Original Assignee
Cinchy, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cinchy, Inc. filed Critical Cinchy, Inc.
Publication of WO2022020169A1 publication Critical patent/WO2022020169A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P7/00—Securing or covering of load on vehicles
    • B60P7/06—Securing of load
    • B60P7/08—Securing to the vehicle floor or sides
    • B60P7/0823—Straps; Tighteners
    • B60P7/083—Tensioning by repetetive movement of an actuating member

Definitions

  • Ratchet straps are used to maintain a load in place during transport and while stationary.
  • the load may include one or more objects.
  • ratchet straps may be difficult to use, especially for individuals that use them sporadically. Additionally, it may be difficult for some less experienced individuals to sufficiently tighten down the ratchet strap against the load to prevent the load from moving during transport, or sufficiently release the ratchet strap from the load after transport. As a result, it is desirable to improve the functionality and usability of ratchet straps.
  • FIG. 1 depicts a front perspective view of a first exemplary ratchet strap device
  • FIG. 2 depicts a front exploded perspective view of the ratchet strap device of FIG. 1;
  • FIG. 3 depicts a rear exploded perspective view of the ratchet strap device of FIG. 1;
  • FIG. 4 depicts a front perspective view of the ratchet strap device of FIG. 1 with a housing, a tensioning feature, and a lock and release mechanism removed to expose a frame and a planetary gear train;
  • FIG. 5 depicts a rear perspective view of the ratchet strap device of FIG. 4, but including the lock and release mechanism;
  • FIG. 6 depicts a perspective sectional view of the ratchet strap device of FIG. 1 taken along section line 6-6 of FIG. 1 ;
  • FIG. 7A depicts a cross-sectional view of the ratchet strap device of FIG. 1 taken along section line 7A-7A of FIG. 1 in a locked configuration
  • FIG. 7B depicts a cross-sectional view of the ratchet strap device similar to FIG. 7A, but in an unlocked configuration
  • FIG. 8 depicts a front perspective view of a second exemplary ratchet strap device
  • FIG. 9 depicts an exemplary method of using the ratchet strap device of FIG. 1;
  • FIG. 10 depicts multiple ratchet strap devices of FIG. 1 being used in combination to tie down a load onto an automobile.
  • FIGS. 1-7B shows an exemplary tension device in the form of a first exemplary ratchet strap device (10). More specifically, FIG. 1 shows a front perspective view of ratchet strap device (10). FIGS. 2 and 3 show front and rear exploded perspective views of ratchet strap device (10) of FIG. 1. As shown, ratchet strap device (10) includes a housing (12), a frame (14), a movable member (e.g., movable strap (16)), a fixed strap (18), a spool assembly (20), a tensioning feature (22), a planetary gear train (24), an optional spring (26), and a lock and release mechanism (28).
  • housing (12) includes first and second housing portions (30, 32).
  • First and second housing portions (30, 32) are configured to surround spool assembly (20) when first and second housing portions (30, 32) contact each another.
  • housing (12) covers spool assembly (20) in order to reduce, and in some instances even eliminate, exposed moving parts (e.g., exposed metallic moving parts).
  • Housing (12) may have a variety of shapes and sizes. Housing (12) may include optional gripping features (35) to assist with user ergonomics.
  • a ring gear (34) is formed on first housing portion (30).
  • First and second housing portions (30, 32) may be coupled together using fasteners (36) which may be received in threaded apertures (38). While five fasteners (36) and five threaded apertures (38) are shown, more or fewer fasteners (36) are envisioned.
  • First and second housing portions (30, 32) may be formed of a polymeric material (e.g., plastic) or any other suitable material.
  • First housing portion (30) may be formed together as a single unitary piece.
  • second housing portion (32) may be formed together as a single unitary piece.
  • frame (14) includes first and second frame members (40, 42). While first and second frame members (40, 42) are shown extending generally parallel to one another and being bent from a single unitary piece, it is envisioned that first and second frame members (40, 42) may be completely separate. Frame (14) is completely disposed within housing (12) in the present example. Frame (14) may include a catch plate (44) that is disposed between first and second frame members (40, 42). In some versions, frame (14) may be formed from metal, which may provide greater structural strength than plastic. First and second frame members (40, 42) may be coupled together using cross members (45). Catch plate (44) and cross members (45) may improve the structural rigidity of frame (14).
  • movable strap (16) may extend through and exit housing (12) through an aperture (46).
  • Movable strap (16) may be a self-contained, auto-retracting strap.
  • Movable strap (16) may be at least partially wound around spool assembly (20).
  • Straps (16, 18) may have a variety of sizes. In some versions, straps (16, 18) may have a width (W) of approximately two inches, yet in other versions may have a width (W) of approximately 0.5 inches. However, it is envisioned that straps (16, 18) may have a width (W) narrower than 0.5 inches, be between 0.5 inches and 2 inches, or be wider than 2 inches. Length of straps (16, 18) may vary.
  • straps (16, 18) may have a working strength of between approximately 100 pound-force and approximately 700 pound-force; in other versions, straps (16, 18) may have a working strength of between approximately 300 pound-force and approximately 500 pound-force; still yet in other versions, straps (16, 18) may have a working strength of approximately 400 pound-force. In some versions, straps (16, 18) may have a breaking strength of between approximately 300 pound-force and approximately 2100 pound- force; in other versions, straps (16, 18) may have a breaking strength of between approximately 900 pound-force and approximately 1500 pound-force; still yet in other versions, straps (16, 18) may have a breaking strength of approximately 1200 pound- force.
  • a terminal end (48) of movable strap (16) may be coupled with a first coupling feature (shown as first hook (50)). As shown, a folded over portion of movable strap (16) is sewn together once first hook (50) is inserted.
  • Fixed strap (18) may be fixed relative to frame (14) and housing (12).
  • a terminal end (52) of fixed strap (18) may be coupled with a second coupling feature (shown as second hook (54)). While first and second hooks (50, 54) are shown as S hooks; other suitable hooks such as wire hooks, flat hooks, and E track hooks are also envisioned, While first and second hooks (50, 54) are shown, straps (16, 18) may be coupled with tie down structure(s) (TD) (see FIG.
  • straps (16, 18) may be replaced, in whole or in part, with alternative elongate members configured to support tension therethrough, such as one or more cables.
  • the invention is thus not intended to be unnecessarily limited to straps (16, 18) shown and described herein.
  • Spool assembly (20) includes a central arbor shaft (58) that may be coaxially disposed within central cavity (55) (see FIG. 2).
  • Central arbor shaft (58) includes an aperture (59) to retain tensioning feature (22).
  • Central arbor shaft (58) may comprise first and second portions (e.g., top and bottom portions), which may be separately extruded and subsequently combined together.
  • spool assembly (20), spring (26), and planetary gear train (24) may be coaxially arranged along a central axis (CA).
  • Spool assembly (20) includes first and second spool frame members (60, 62).
  • First spool frame member (60) includes an outer periphery (64) with a plurality of spaced ratchet pawls (66).
  • second spool frame member (62) includes an outer periphery (68) with a plurality of spaced ratchet pawls (70).
  • One or more fasteners (72) shown as slotted pin(s) in FIG. 5 may couple with central arbor shaft (58) and first frame member (40).
  • spool assembly (20) includes a spring housing (56).
  • a terminal end (49) of movable strap (16), disposed opposite terminal end (48), is coupled with spring housing (56) of spool assembly (20).
  • Tensioning feature (22) is configured to selectively adjust the tension of movable strap (16). As shown in FIGS. 1-3, tensioning feature (22) includes a tensioning knob (74) configured to be rotated by a user to manually adjust the tension of movable strap (16). Tensioning knob (74) may be secured with a second aperture (59) of central arbor shaft (58) with a fastener (76) (shown as an S-shaped wire in FIG. 2). A washer (78) ( see FIG. 2) may fit over tensioning knob (74). Tensioning knob (74) may have a variety of shapes and sizes and may include gripping features (75). In some versions, an optional label (77) may be fixably attached (e.g., using an adhesive) to a front face of tensioning knob (74). Label (77) may include text and/or graphics.
  • planetary gear train (24) includes first and second stages of operation. While not shown, planetary gear train (24) may have a single stage where a high gear ratio is not needed (e.g., a mini ratchet strap (not shown)). Alternatively, ratchet strap device (10) may include additional stages (i.e., a third stage, a fourth stage, a fifth stage etc.) if desired. Planetary gear train (24) provides a mechanical advantage as compared to a simple knob and shaft arrangement. This mechanical advantage may improve the user’s ease of use and require less force from the user to rotate tensioning knob (74).
  • Planetary gear train (24) by providing the mechanical advantage, acts to reduce the input speed provided by the user manually rotating tensioning knob (74).
  • the gear ratio may be between approximately 1.1:1 and approximately 15:1; in other versions, the gear ratio of planetary gear train (24) may be between approximately 3:1 and approximately 4:1; still in yet other versions, the gear ratio may be approximately 3.38:1.
  • planetary gear train (24) includes a ring gear (34), a first sun gear (80), a first plurality of planetary gears (82), a first carrier (84), a second sun gear (92), a second plurality of planetary gears (104), a second carrier (106), and a mechanism (108).
  • the first stage may include first sun gear (80), planetary gears (82), and first carrier (84).
  • the second stage may include planetary gears (104), second carrier (106), and mechanism (108). While six planetary gears (82, 104) are shown for each of the first and second stages, more or fewer planetary gears for each of the first and second stages are also envisioned.
  • First sun gear (80) is rotatably coupled with tensioning knob (74), such that as tensioning knob (74) is rotated first sun gear (80) rotates in the same direction. More specifically, first sun gear (80) is disposed on an interior surface of tensioning knob (74) of tensioning feature (22). As shown in FIG. 7, first sun gear (80) is integrally formed together as a unitary piece together with tensioning knob (74). Planetary gears (82) may be configured to rotate relative to first sun gear (80) and ring gear (34), and planetary gears (104) may be configured to rotate relative to second sun gear (92) (see FIG. 3) and ring gear (34) to tension movable strap (16). First carrier (84) may be rotatably coupled with second sun gear (92).
  • first carrier (84) is integrally formed together as a unitary piece together with second sun gear (92).
  • second carrier (106) may be rotatably coupled with mechanism (108).
  • second carrier (106) is integrally formed together as a unitary piece together with mechanism (108).
  • Ring gear (34) includes a plurality of gear teeth (86).
  • First sun gear (80) includes a plurality of gear teeth (88).
  • Planetary gears (82) each include a plurality of gear teeth (90).
  • First carrier (84) includes second sun gear (92), where second sun gear (92) includes a plurality of gear teeth (93).
  • Planetary gears (104) each include a plurality of gear teeth (110).
  • Gear teeth (88) of first sun gear (80) are configured to engage gear teeth (90) of planetary gears (82).
  • Gear teeth (90) of planetary gears (82) and gear teeth (110) of planetary gears (104) are configured to engage gear teeth (86) of ring gear (34).
  • ring gear (34), first sun gear (80), planetary gears (82), second sun gear (92), planetary gears (104) are shown as spur gears, other suitable gears are also envisioned such as helical gears. While ring gear (34), first sun gear (80), planetary gears (82), and planetary gears (104) are shown as being formed from a polymeric material and second sun gear (92) is shown as being formed from a metallic material (e.g., aluminum), other suitable materials for each of these components are also envisioned,
  • Planetary gear train (24) is coupled with tensioning feature (22) and spool frame member (60).
  • Mechanism (108) includes a plurality of engagement features (112) that are configured to couple with corresponding engagement features frame member (60) of spool assembly (20) to drive first frame member (40).
  • fasteners (114) are received in apertures (116) of second carrier (106) and apertures (118) of first spool frame member (60) to rotatably couple carrier (106) with first spool frame member (60) of spool assembly (20).
  • spring (26) may be disposed within spring housing (56).
  • Spring (26) is configured to automatically retract movable strap (16) around spool assembly (20).
  • Spring (26) may be omitted in versions where automatic retraction is not desired.
  • spring (26) includes a constant force spring (96).
  • Constant force spring (96) includes a fixed end (98) and an active end (100). Fixed end (98) of constant force spring (96) is coupled with central arbor shaft (58) and active end (100) may be operatively coupled with an end of movable strap (16).
  • constant force spring (96) is disposed inside central cavity (55) of spool assembly (20) and applies a spring force to auto-retract movable strap (16).
  • constant force spring (96) may be disposed adjacent to spool assembly (20), which may allow for the overall size of ratchet strap device (10) to be reduced. This may be beneficial when there is limited spaced to deploy or use ratchet strap device (10).
  • the retraction force of spring (26) may be between approximately 0.25 pound- force and approximately 10 pound-force; in other versions, the retraction force of spring (26) may have a range of between approximately 2.5 pound-force and approximately 3.5 pound-force; still in yet other versions, the retraction force of spring (26) may be approximately 3 pound-force.
  • Lock and release mechanism (28) is described with reference to FIGS. 7A-7B. As shown by comparing FIG. 7 A with FIG. 7B, lock and release mechanism (28) is configured to move ratchet strap device (10) between a locked configuration and an unlocked configuration. More specifically, FIG. 7A depicts a cross-sectional view of ratchet strap device (10) of FIG. 1 in the locked configuration. In the locked configuration, movable strap (16) is inhibited (such as by being prevented) from extending further, and the tension in movable strap (16) may be maintained. For example, ratchet strap device (10) may be in the locked configuration when being used to maintain a load (L) (see FIG. 10) in place during transport and while stationary.
  • L load
  • Ratchet strap device (10) includes torsion springs (102, 103) (see FIG. 5). Torsion spring (102) is configured to engage catch plate (44) with ratchet pawls (66, 70) unless lock and release mechanism (28) is in the unlocked configuration. Torsion spring (102) may maintain catch plate (44) engagement with ratchet pawls (66, 70) in the locked configuration unless the lock and release mechanism (28) is manually actuated so that the external force (E) exceeds the spring force exerted by torsion spring (102).
  • Torsion spring (103) may exert a spring force on lock and release mechanism (28) to return lock and release mechanism (28) to the locked configuration.
  • torsion spring (102) may be replaced with a coil spring (not shown) to engage catch plate (44) with ratchet pawls (66, 70) in the locked configuration.
  • FIG. 7B depicts a cross-sectional view of the ratchet strap device (10) of FIG. 7A, but in the unlocked configuration.
  • terminal end (48) of movable strap (16) may be extended outwardly out of aperture (46) as desired (e.g., to unwind additional length of strap (16)).
  • Aperture (46) assists in guiding movable strap (16) back within housing (12) during retraction and may prevent movable strap (16) from becoming tangled.
  • Lock and release mechanism (28) may both lock movable strap (16) and release movable strap (16) depending on direction of positioning of lock and release mechanism (28). While lock and release mechanism (28) is shown the form of a pivoting push button that pivots about pivot axis (PA), a variety of other suitable lock and release mechanisms are envisioned.
  • FIG. 8 shows another exemplary tension device in the form of a second exemplary ratchet strap device (210).
  • Components of ratchet strap device (210) may be the same or similar to (and may function the same or similarly to) those components of the same name of ratchet strap device (10) described in detail above with reference to FIGS. 1-7B, except as where otherwise described below.
  • ratchet strap device (210) includes a housing (212), a movable strap (216), a tensioning feature (222), a lock and release mechanism (228), a first housing portion (230), a second housing portion (232), gripping features (235), an aperture (246), a first hook (250), a tensioning knob (274), and gripping features (275).
  • ratchet strap device (210) includes fixable member (218) instead of fixed strap (18) and second hook (54).
  • Fixable member (218) shown as a rigid bracket, is secured with at least one of housing (212) or frame (not shown). While fixable member (218) is shown as being rigid, it is also envisioned that fixable member (218) may be at least partially flexible.
  • Fixable member (218) may be secured with a tie down structure (TD) (see FIG. 10) to fix the position of the fixable member (218) relative to that tie down structure (TD) and preventing housing (212) of ratchet strap device (210) from moving relative to the tie down structure (TD).
  • Fixable member (218) includes at least one aperture (221) configured to receive at least one fastener (223) to secure ratchet strap device (210) with the tie down structure (TD).
  • FIG. 9 depicts an exemplary method (310) of using ratchet strap devices (10,
  • a single ratchet strap device (10, 210) may be used to prevent load (L) from moving.
  • two or more ratchet strap devices (10, 210) may be used in combination to prevent load (L) from moving.
  • method (310) includes securing one of first hook (50, 250) or second hook (54)/fixable member (218) with tie down structure (TD).
  • second hook (54) may be hooked into tie down structure (TD) shown in the form of a tie down anchor of a pick-up truck (T); however, a variety of other tie down structures (TD) are also envisioned.
  • first hook (50, 250) may be secured prior to second hook (54) or fixable member (218) being secured and prior to movable strap (16, 216) being extended.
  • method (310) includes moving lock and release mechanism (28, 228) from the locked configuration (see FIG. 7A) to the unlocked configuration (see FIG. 7B).
  • method (310) includes extending movable strap (16, 216). Steps (314) and (316) may be performed simultaneously. Extending movable strap (16, 216) may include actuating lock and release mechanism (28, 228) which may be in the locked configuration by default (unless acted upon by an external force).
  • method (310) includes moving lock and release mechanism (28, 228) from the unlocked configuration to the locked configuration, which in some versions may be automatically performed by releasing lock and release mechanism (28, 228).
  • method (310) includes securing the other of first hook (50, 250) or second hook (54)/fixable member (218).
  • first hook (50) may be hooked into the same or another tie down anchor of the pick-up truck (T).
  • method (310) may also include selectively adjusting the tension of movable strap (16, 216) using tensioning feature (22, 222), which is rotatably coupled with planetary gear train (24).
  • tensioning feature 22, 222
  • the tension of movable strap (16, 216) may be selectively adjusted by rotating tensioning knob (74, 274).
  • the tension may be adjusted after first hook (50, 250) and second hook (54) or fixable member (218) are secured to one or more tie down structures (TD).
  • load (L) is prevented from moving.
  • FIG. 10 depicts multiple ratchet strap devices (10) of FIG. 1 in the locked configuration being used to tie down load (L) in the bed of a pickup truck (T).
  • Load (L) includes first objects (01), shown as 2 inch by 4 inch boards, as well as second objects (02) shown as 4 inch by 4 inch posts.
  • first objects (01) shown as 2 inch by 4 inch boards
  • second objects (02) shown as 4 inch by 4 inch posts.
  • method (310) may include transitioning movable strap (16, 216) from the locked configuration to the unlocked configuration.
  • method (310) may include removing at least one of first hook (50, 250) or second hook (54)/fixable member (218) from tie down structure (TD).
  • method (310) may include retracting movable strap (16, 216). Once at least one of first hook (50, 250) or second hook (54)/fixable member (218) is decoupled from tie down structure (TD), spring (26) may automatically retract movable strap (16, 216) around spool assembly (20). In some versions, where spring (26) is omitted, movable strap (16, 216) may be manually wound back around spool assembly (20) by rotating tensioning knob (74, 274).
  • a tension device comprising: (a) a spool assembly; (b) a movable member that is at least partially wound around the spool assembly; (c) a tensioning feature configured to selectively adjust tension of the movable member; and (d) a planetary gear train coupled with the tensioning feature, the planetary gear train comprising: (i) a ring gear, (ii) a sun gear configured to be rotated using the tensioning feature, and (iii) a plurality of planetary gears that are configured to rotate relative to the sun gear and the ring gear to tension the movable member.
  • Example 2 [00050] The tension device of Example 1, further comprising a housing, wherein the housing includes first and second housing portions configured to surround the spool assembly.
  • the tension device of any one or more of the preceding Examples further comprising a frame that is completely disposed within the first and second housing portions.
  • Example 5 The tension device of Example 5, wherein the frame further comprises a first frame member, a second frame member, and a catch plate that is disposed between the first and second frame members.
  • the tension device of any one or more of the preceding Examples further comprising a fixed member configured to couple with a tie down structure, wherein the fixed member is fixed relative to the frame.
  • the tension device of any one or more of the preceding Examples wherein the spool assembly defines a cavity, the tension device further comprising a spring disposed inside of the cavity, wherein the spring is configured to automatically retract the movable member around the spool assembly.
  • the tension device of any one or more of the preceding Examples, wherein the tensioning feature includes a tensioning knob configured to be rotated by a user to manually adjust the tension of the movable member, wherein the sun gear is rotatably coupled with the tensioning knob.
  • Example 14 The tension device of any one or more of the preceding Examples, further comprising a lock and release mechanism selectively movable between locked and unlocked configurations, wherein in the locked configuration the movable member is prevented from moving away from the spool assembly, wherein in the unlocked configuration the movable member is configured to move away from the spool assembly.
  • the tension device of Example 14 further comprising a torsion spring and a catch plate
  • the spool assembly includes first and second spool frame members, wherein the first and second spool frame members each have an outer periphery, wherein the outer peripheries of the first and second spool frame members each include a plurality of spaced ratchet pawls, wherein the torsion spring is configured to selectively engage the catch plate with the spaced ratchet pawls in the locked configuration.
  • the tension device of any one or more of the preceding Examples wherein the movable member comprises a flexible strap, wherein the flexible strap includes a terminal end that is coupled with a first coupling feature.
  • Example 19 The tension device of any one or more of the preceding Examples, wherein the planetary gear train further comprises a carrier, wherein the carrier is rotatably coupled with the spool assembly.
  • the tension device of any one or more of the preceding Examples wherein the ring gear includes a plurality of first teeth, wherein the sun gear includes a plurality of second teeth, wherein the planetary gears each include a plurality of third teeth, wherein the plurality of second teeth of the sun gear are configured to engage the plurality of third teeth of the planetary gears, wherein the plurality of third teeth of the planetary gears are configured to engage the plurality of first teeth of the ring gear.
  • a tension device comprising: (a) a spool assembly; (b) a movable member that is at least partially wound around the spool assembly; (c) a tensioning feature configured to selectively adjust tension of the movable member; and (d) a planetary gear train coupled with the tensioning feature, the planetary gear train comprising: (i) a ring gear, (ii) first and second sun gears, (iii) first and second carriers, and (iv) first and second pluralities of planetary gears that are configured to rotate relative to the first sun gear and the ring gear to tension the movable member.
  • Example 23 [00092] The tension device of Example 22, wherein the first and second pluralities of planetary gears are configured to each engage the ring gear.
  • a method of using a tension device wherein the tension device includes a housing, a spool assembly, a movable member that is at least partially wound around the spool assembly, a tensioning feature, and a planetary gear train, the method comprising: (a) moving the movable member from a locked configuration to an unlocked configuration; (b) extending the movable member away from the housing; and (c) selectively adjusting the tension of the movable member using the tensioning feature which is rotatably coupled with a portion of the planetary gear train.
  • Example 26 The method of Example 26, further comprising fixing a fixed member of the tension device with a tie down structure prior to selectively adjusting the tension of the movable member.
  • Example 29 The method of Example 29, wherein the first housing portion is rotatably fixed relative to the ring gear.
  • Example 32 The method of Example 32, wherein the spool assembly, the spring, and the planetary gear train are coaxially disposed along a central axis.
  • the spool assembly includes a central arbor shaft, wherein the spring includes a fixed end and an active end, wherein the fixed end is coupled with the central arbor shaft and the active end is operatively coupled with the movable member.
  • Example 26 and Examples 28 through 34 further comprising selectively moving a lock and release mechanism between locked and unlocked configurations, wherein in the locked configuration the movable member is prevented from moving away from the spool assembly, wherein in the unlocked configuration the movable member is selectively moved away from the spool assembly.
  • the planetary gear train further comprises: (i) a second sun gear, (ii) a first carrier configured to guide movement of the plurality of planetary gears, (iii) a second plurality of planetary gears that are configured to rotate relative to the sun gear and the ring gear to tension the movable member, and (iv) a second carrier configured to guide movement of the second plurality of planetary gears.

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  • Transportation (AREA)
  • Mechanical Engineering (AREA)
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Abstract

La présente invention concerne un dispositif de tension comprenant un ensemble bobine, un élément mobile, un élément de tension, un train planétaire et un ressort. L'ensemble bobine délimite une cavité. L'élément mobile est au moins partiellement enroulé autour de l'ensemble bobine. L'élément de tension est conçu pour ajuster sélectivement la tension de l'élément mobile. Le train planétaire est accouplé à l'élément de tension. Le train planétaire comprend une couronne, un planétaire et une pluralité d'engrenages planétaires qui sont conçus pour se mettre en rotation par rapport au planétaire et à la couronne pour tendre l'élément mobile. Le planétaire est conçu pour être mis en rotation à l'aide de l'élément de tension.
PCT/US2021/041782 2020-07-20 2021-07-15 Dispositif de tension et procédés associés WO2022020169A1 (fr)

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US202063053865P 2020-07-20 2020-07-20
US63/053,865 2020-07-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080060168A1 (en) * 1997-08-22 2008-03-13 Hammerslag Gary R Reel based closure system
US20100212116A1 (en) * 2004-11-08 2010-08-26 Tie Boss Llc Tie down tensioning device
US20190389362A1 (en) * 2018-06-26 2019-12-26 Shape Shifter Design, Inc. Ratchet tie-down device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080060168A1 (en) * 1997-08-22 2008-03-13 Hammerslag Gary R Reel based closure system
US20100212116A1 (en) * 2004-11-08 2010-08-26 Tie Boss Llc Tie down tensioning device
US20190389362A1 (en) * 2018-06-26 2019-12-26 Shape Shifter Design, Inc. Ratchet tie-down device

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