CA2528835A1 - Chain hook lock - Google Patents
Chain hook lock Download PDFInfo
- Publication number
- CA2528835A1 CA2528835A1 CA002528835A CA2528835A CA2528835A1 CA 2528835 A1 CA2528835 A1 CA 2528835A1 CA 002528835 A CA002528835 A CA 002528835A CA 2528835 A CA2528835 A CA 2528835A CA 2528835 A1 CA2528835 A1 CA 2528835A1
- Authority
- CA
- Canada
- Prior art keywords
- locking member
- hook
- clevis
- chain
- jaw
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B45/00—Hooks; Eyes
- F16B45/02—Hooks with pivoting or elastically bending closing member
- F16B45/023—Hooks with pivoting or elastically bending closing member the closing member pivoting about an axis perpendicular to the plane of the hook
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G17/00—Hooks as integral parts of chains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
- B66C1/34—Crane hooks
- B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B45/00—Hooks; Eyes
- F16B45/02—Hooks with pivoting or elastically bending closing member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Description
CHAIN HOOK LOCK
This invention relates to hooks for use with chains and in particular to locking devices for a grab hook to prevent an engaged chain link from slipping out of the grab hook.
BACKGROUND
A typical chain for general use in securing loads, towing, and the like include a hook on each end to engage the chain. A grab hook will engage or grab the chain and form a loop io of a desired substantially fixed size. The grab hook has an opening or jaw that has a width just slightly larger than the width of the chain link and long enough that a chain link will slide into the jaw, and the adjacent link of the chain will bear against the hook.
In contrast a slip hook has a larger rounded jaw through which the chain will slide to tighten a loop around an object within the loop. Chains are often stocked in bulk on rolls so that a customer can simply buy a chain of the desired length, and add a grab or slip hook to each end as desired for his particular application. Chain hooks therefore are commonly available in various sizes for attachment to corresponding sizes of chain by a clevis. The end link of the chain is inserted between the clevis arnns and a clevis pin is inserted through bores in the clevis pin and through the end link, and secured by a cotter pin or the like.
It is often desired to lock the chain into the grab hook to prevent the chain link from slipping out of the jaw of the grab hook. United States Patent Number 5,127,219 to Herron et. al. discloses a typical application where such a lock is used on a safety chain securing an agricultural implement to a tractor drawbar. The lock is provided by a wire formed latch engages grooves on either side of the jaw of the hook. The lock and jaw are thus an integrated unit, and the lock is not adaptable to the conventional and commonly available grab hook with a clevis attachment.
United States Patent Number 3.501,817 to Bambenek et al. discloses a lock mechanism that can be added to a conventional grab hook by attachment to the clevis pin.
A resilient member is urged outward across the opening of the jaw to engage the free end of the hook such that lateral movement is prevented. To open the lock, the resilient member is pushed inward to disengage same from the free end of the hook so that same may be rotated to the side to allow a chain link to be removed from the jaw, or to insert a link to be locked in the jaw.
United States Patent Number 6,019,408 to Bennett, Jr. also discloses a locking mechanism that can be added to a conventional grab hook by attachment to the clevis pin.
The lock includes a spring biased member that engages the shank of the hook to prevent rotation of the locking member out of the opening of the jaw. Pressing against the spring bias disengages the shank and allows the locking member to rotate to allow insertion or removal of a chain link.
Such locking mechanisms for conventional grab hooks are also known where the clevis pin is spring loaded and the locking member defines a slot and a larger hole at one end of the slot. The clevis pin engages the larger hole and pushing against the pin disengages the pin from the larger hole and moves a narrower portion of the pin into alignment with the slot and allows locking member to slide out to open the jaw of the grab hook.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a grab hook locking apparatus for a chain that overcomes problems in the prior art.
Then invention provides a grab hook locking apparatus for installation on a conventional grab hook that includes a clevis for attachment to an end link of a chain. The grab hook is of the type configured to engage a chain link that is inserted laterally into the jaw of the grab hook. The apparatus comprises a lock member defining a pin aperture in a rear end thereof and attached to the top of the clevis adjacent to the open end of the jaw of the hook by the head of a clevis pin inserted through the pin aperture and the bores of the clevis. A pivot washer is located between the locking member and the top of the clevis and a spring is secured to the bottom end of the clevis pin under the bottom of the clevis such that the spring exerts a downward bias force on the clevis pin and urges the head of the clevis pin downward on the locking member and urging the locking member downward against the pivot washer which keeps the locking member above the top of the clevis so that same can pivot downward on the front end thereof.
The locking member is configured such that when in the closed position, same is oriented substantially parallel with the top of the clevis and a front end of the locking member extends into the open end of the jaw a sufficient distance to prevent a chain link engaged in the jaw from moving out of engagement with the hook. The locking member includes tabs attached to sides thereof forward of the pin aperture such that pushing downward on the tabs pivots the front end of the locking member downward to the open position and moves the clevis pin upward against the bias force of the spring. The front end of the locking member moves downward a sufficient distance to allow a chain link to be removed. Similarly when engaging a chain link in the hook, sliding the chain link against the top of the locking member or pressing down on the tabs or up on the bottom of the clevis pin will pivot the locking member down to allow the chain link to move into the jaw.
If an outward force is exerted on a chain link that is locked into the jaw the link will contact the front end of the locking member and move the front end upward and completely compress the spring on the clevis pin such that further upward movement of the clevis pin and the front end of the locking member is prevented, and the chain link is retained in the jaw of the hook.
The apparatus of the invention thus provides convenient locking and unlocking of the chain link into the grab hook and prevents inadvertent disengagement. The apparatus is readily installed on commonly available conventional grab hooks with a clevis for attachment to a chain. The apparatus can be scaled up and down to provide a locking mechanism suitable for various chain sizes.
DESCRII'TION OF THE DRAWINGS
While the invention is claimed in the concluding portions hereof, preferred embodiments are provided in the accompanying detailed description which may be best understood in conjunction with the accompanying diagrams where like parts in each of the several diagrams are labeled with like numbers, and where:
Fig. I is a side view of an embodiment of the grab hook locking apparatus of the present invention in the closed position with a chain link engaged in the grab hook;
Fig. 2 is a side view of the embodiment of Fig. I in the open position with a chain link partly engaged in the hook;
Fig. 3 is a side view of the embodiment of Fig. 1 in the closed position with the chain link experiencing a force in a direction to move same out of engagement with the hook;
Fig. 4 is a schematic end view of the embodiment of Fig. 1 in the closed position;
Fig. 5 is a top view of the locking member of the embodiment of Fig. 1.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
Figs. 1- 4 illustrate a conventional grab hook 1 with a clevis 3 for attachment to a chain.
The grab hook I is of the type configured to engage a chain link 5 that is inserted laterally into the jaw 7 of the grab hook 1. A locking apparatus 10 of the invention is installed on the grab hook 1.
The apparatus 10 comprises a locking member 11, further illustrated in Fig. 5, defining a pin aperture 13 in a rear end thereof and attached to the top member 15 of the clevis 3 adjacent to the open end of the jaw 7 by the head 17 of a clevis pin 19 inserted through the pin aperture 13 and the bores 21 of the clevis 3. A pivot washer 23 is located between the locking member 11 and the top of the clevis 3 and a spring 25 is secured to the bottom end of the clevis pin 19 under the bottom of the clevis 3 by a collar 27 attached to the clevis pin 19 by a roll pin 29 or the like. The spring 25 exerts a downward bias force BF on the clevis pin 19 and urges the head 17 of the clevis pin 19 downward on the locking member 11 and urging the locking member 11 downward against the pivot washer 23.
The locking member 11 is configured such that when in the closed position illustrated in 1o Fig. 1, same is oriented substantially parallel with the top of the clevis 3 and a front end 31 of the locking member 11 extends into the open end of the jaw 7 a sufficient distance to prevent a chain link 5 engaged in the jaw 7 from moving out of engagement with the hook 1. The pivot washer 23 keeps the locking member 11 above the top of the clevis 3 so that the locking member 1 i can pivot downward on the front end 31 thereof.
To aid in removing the chain link 5, the locking member 11 includes tabs 33 attached to sides thereof forward of the pin aperture 13. Pushing downward on the tabs 33 pivots the front end 31 of the locking member 11 downward to the open position illustrated in Fig. 2 and moves the clevis pin 19 upward against the bias force BF of the spring 25.
The pin aperture 13 in the locking member 11 is somewhat larger in diameter than the clevis pin 19 to allow the locking member. l l to pivot up and down. The front end 31 of the locking member 11 moves downward a sufficient distance to allow the chain link 5 to be removed. Similarly when engaging the chain link 5 in the hook, sliding the chain link 11 against the top of the locking member 11 or pressing down on the tabs 33 or up on the bottom end 35 of the clevis pin 19 will pivot the locking member I1 down to allow the chain link 5 to move into the jaw 7.
The illustrated tabs 33 extend downward and then outward such that each tab 33 can be conveniently gripped with a finger while pressing upward on the bottom end 35 of the clevis pin 19 with the thumb to release or engage a chain link 5. The downward extending tabs 33 also serve to maintain the locking member l 1 in the proper orientation with respect to the hook 1 by preventing the locking member 11 from rotating about the clevis pin 19.
As illustrated in Fig. 3, when an outward force F is exerted on a chain link 5 that is locked into the jaw 7, the link 5 will contact the front end 31 of the locking member 11 and move the front end 31 upward and completely compress the spring 25 on the clevis pin 19 such that further upward movement of the clevis pin 19 and the front end 31 of the locking member I 1 is prevented, and the chain link 5 is retained in the jaw 7 of the hook The foregoing is considered as illustrative only of the principles of the invention. It is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.
Further, since numerous changes and modifications will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all such suitable changes or modifications in structure or operation which may be resorted to are intended to fall within the scope of the claimed invention.
This invention relates to hooks for use with chains and in particular to locking devices for a grab hook to prevent an engaged chain link from slipping out of the grab hook.
BACKGROUND
A typical chain for general use in securing loads, towing, and the like include a hook on each end to engage the chain. A grab hook will engage or grab the chain and form a loop io of a desired substantially fixed size. The grab hook has an opening or jaw that has a width just slightly larger than the width of the chain link and long enough that a chain link will slide into the jaw, and the adjacent link of the chain will bear against the hook.
In contrast a slip hook has a larger rounded jaw through which the chain will slide to tighten a loop around an object within the loop. Chains are often stocked in bulk on rolls so that a customer can simply buy a chain of the desired length, and add a grab or slip hook to each end as desired for his particular application. Chain hooks therefore are commonly available in various sizes for attachment to corresponding sizes of chain by a clevis. The end link of the chain is inserted between the clevis arnns and a clevis pin is inserted through bores in the clevis pin and through the end link, and secured by a cotter pin or the like.
It is often desired to lock the chain into the grab hook to prevent the chain link from slipping out of the jaw of the grab hook. United States Patent Number 5,127,219 to Herron et. al. discloses a typical application where such a lock is used on a safety chain securing an agricultural implement to a tractor drawbar. The lock is provided by a wire formed latch engages grooves on either side of the jaw of the hook. The lock and jaw are thus an integrated unit, and the lock is not adaptable to the conventional and commonly available grab hook with a clevis attachment.
United States Patent Number 3.501,817 to Bambenek et al. discloses a lock mechanism that can be added to a conventional grab hook by attachment to the clevis pin.
A resilient member is urged outward across the opening of the jaw to engage the free end of the hook such that lateral movement is prevented. To open the lock, the resilient member is pushed inward to disengage same from the free end of the hook so that same may be rotated to the side to allow a chain link to be removed from the jaw, or to insert a link to be locked in the jaw.
United States Patent Number 6,019,408 to Bennett, Jr. also discloses a locking mechanism that can be added to a conventional grab hook by attachment to the clevis pin.
The lock includes a spring biased member that engages the shank of the hook to prevent rotation of the locking member out of the opening of the jaw. Pressing against the spring bias disengages the shank and allows the locking member to rotate to allow insertion or removal of a chain link.
Such locking mechanisms for conventional grab hooks are also known where the clevis pin is spring loaded and the locking member defines a slot and a larger hole at one end of the slot. The clevis pin engages the larger hole and pushing against the pin disengages the pin from the larger hole and moves a narrower portion of the pin into alignment with the slot and allows locking member to slide out to open the jaw of the grab hook.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a grab hook locking apparatus for a chain that overcomes problems in the prior art.
Then invention provides a grab hook locking apparatus for installation on a conventional grab hook that includes a clevis for attachment to an end link of a chain. The grab hook is of the type configured to engage a chain link that is inserted laterally into the jaw of the grab hook. The apparatus comprises a lock member defining a pin aperture in a rear end thereof and attached to the top of the clevis adjacent to the open end of the jaw of the hook by the head of a clevis pin inserted through the pin aperture and the bores of the clevis. A pivot washer is located between the locking member and the top of the clevis and a spring is secured to the bottom end of the clevis pin under the bottom of the clevis such that the spring exerts a downward bias force on the clevis pin and urges the head of the clevis pin downward on the locking member and urging the locking member downward against the pivot washer which keeps the locking member above the top of the clevis so that same can pivot downward on the front end thereof.
The locking member is configured such that when in the closed position, same is oriented substantially parallel with the top of the clevis and a front end of the locking member extends into the open end of the jaw a sufficient distance to prevent a chain link engaged in the jaw from moving out of engagement with the hook. The locking member includes tabs attached to sides thereof forward of the pin aperture such that pushing downward on the tabs pivots the front end of the locking member downward to the open position and moves the clevis pin upward against the bias force of the spring. The front end of the locking member moves downward a sufficient distance to allow a chain link to be removed. Similarly when engaging a chain link in the hook, sliding the chain link against the top of the locking member or pressing down on the tabs or up on the bottom of the clevis pin will pivot the locking member down to allow the chain link to move into the jaw.
If an outward force is exerted on a chain link that is locked into the jaw the link will contact the front end of the locking member and move the front end upward and completely compress the spring on the clevis pin such that further upward movement of the clevis pin and the front end of the locking member is prevented, and the chain link is retained in the jaw of the hook.
The apparatus of the invention thus provides convenient locking and unlocking of the chain link into the grab hook and prevents inadvertent disengagement. The apparatus is readily installed on commonly available conventional grab hooks with a clevis for attachment to a chain. The apparatus can be scaled up and down to provide a locking mechanism suitable for various chain sizes.
DESCRII'TION OF THE DRAWINGS
While the invention is claimed in the concluding portions hereof, preferred embodiments are provided in the accompanying detailed description which may be best understood in conjunction with the accompanying diagrams where like parts in each of the several diagrams are labeled with like numbers, and where:
Fig. I is a side view of an embodiment of the grab hook locking apparatus of the present invention in the closed position with a chain link engaged in the grab hook;
Fig. 2 is a side view of the embodiment of Fig. I in the open position with a chain link partly engaged in the hook;
Fig. 3 is a side view of the embodiment of Fig. 1 in the closed position with the chain link experiencing a force in a direction to move same out of engagement with the hook;
Fig. 4 is a schematic end view of the embodiment of Fig. 1 in the closed position;
Fig. 5 is a top view of the locking member of the embodiment of Fig. 1.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
Figs. 1- 4 illustrate a conventional grab hook 1 with a clevis 3 for attachment to a chain.
The grab hook I is of the type configured to engage a chain link 5 that is inserted laterally into the jaw 7 of the grab hook 1. A locking apparatus 10 of the invention is installed on the grab hook 1.
The apparatus 10 comprises a locking member 11, further illustrated in Fig. 5, defining a pin aperture 13 in a rear end thereof and attached to the top member 15 of the clevis 3 adjacent to the open end of the jaw 7 by the head 17 of a clevis pin 19 inserted through the pin aperture 13 and the bores 21 of the clevis 3. A pivot washer 23 is located between the locking member 11 and the top of the clevis 3 and a spring 25 is secured to the bottom end of the clevis pin 19 under the bottom of the clevis 3 by a collar 27 attached to the clevis pin 19 by a roll pin 29 or the like. The spring 25 exerts a downward bias force BF on the clevis pin 19 and urges the head 17 of the clevis pin 19 downward on the locking member 11 and urging the locking member 11 downward against the pivot washer 23.
The locking member 11 is configured such that when in the closed position illustrated in 1o Fig. 1, same is oriented substantially parallel with the top of the clevis 3 and a front end 31 of the locking member 11 extends into the open end of the jaw 7 a sufficient distance to prevent a chain link 5 engaged in the jaw 7 from moving out of engagement with the hook 1. The pivot washer 23 keeps the locking member 11 above the top of the clevis 3 so that the locking member 1 i can pivot downward on the front end 31 thereof.
To aid in removing the chain link 5, the locking member 11 includes tabs 33 attached to sides thereof forward of the pin aperture 13. Pushing downward on the tabs 33 pivots the front end 31 of the locking member 11 downward to the open position illustrated in Fig. 2 and moves the clevis pin 19 upward against the bias force BF of the spring 25.
The pin aperture 13 in the locking member 11 is somewhat larger in diameter than the clevis pin 19 to allow the locking member. l l to pivot up and down. The front end 31 of the locking member 11 moves downward a sufficient distance to allow the chain link 5 to be removed. Similarly when engaging the chain link 5 in the hook, sliding the chain link 11 against the top of the locking member 11 or pressing down on the tabs 33 or up on the bottom end 35 of the clevis pin 19 will pivot the locking member I1 down to allow the chain link 5 to move into the jaw 7.
The illustrated tabs 33 extend downward and then outward such that each tab 33 can be conveniently gripped with a finger while pressing upward on the bottom end 35 of the clevis pin 19 with the thumb to release or engage a chain link 5. The downward extending tabs 33 also serve to maintain the locking member l 1 in the proper orientation with respect to the hook 1 by preventing the locking member 11 from rotating about the clevis pin 19.
As illustrated in Fig. 3, when an outward force F is exerted on a chain link 5 that is locked into the jaw 7, the link 5 will contact the front end 31 of the locking member 11 and move the front end 31 upward and completely compress the spring 25 on the clevis pin 19 such that further upward movement of the clevis pin 19 and the front end 31 of the locking member I 1 is prevented, and the chain link 5 is retained in the jaw 7 of the hook The foregoing is considered as illustrative only of the principles of the invention. It is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.
Further, since numerous changes and modifications will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all such suitable changes or modifications in structure or operation which may be resorted to are intended to fall within the scope of the claimed invention.
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002528835A CA2528835A1 (en) | 2005-12-06 | 2005-12-06 | Chain hook lock |
US11/567,433 US20070126251A1 (en) | 2005-12-06 | 2006-12-06 | Lock apparatus for a chain grab hook |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002528835A CA2528835A1 (en) | 2005-12-06 | 2005-12-06 | Chain hook lock |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2528835A1 true CA2528835A1 (en) | 2007-06-06 |
Family
ID=38121175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002528835A Abandoned CA2528835A1 (en) | 2005-12-06 | 2005-12-06 | Chain hook lock |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2528835A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102506050A (en) * | 2011-12-24 | 2012-06-20 | 安吉长虹制链有限公司 | Buckle retractable structure |
CN110455141A (en) * | 2019-09-16 | 2019-11-15 | 福建兵工装备有限公司 | Automatic-clamping chain |
-
2005
- 2005-12-06 CA CA002528835A patent/CA2528835A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102506050A (en) * | 2011-12-24 | 2012-06-20 | 安吉长虹制链有限公司 | Buckle retractable structure |
CN110455141A (en) * | 2019-09-16 | 2019-11-15 | 福建兵工装备有限公司 | Automatic-clamping chain |
CN110455141B (en) * | 2019-09-16 | 2024-04-05 | 福建兵工装备有限公司 | Automatic clamping chain |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2027784C (en) | Double locking snap hook | |
EP1117584B1 (en) | Fifth wheel coupler | |
US5735025A (en) | Ergonomic recessed release safety hook | |
US7364181B2 (en) | Self locking coupling device | |
US20070126251A1 (en) | Lock apparatus for a chain grab hook | |
US5188341A (en) | Safety latch for a tire carrier | |
US5257441A (en) | Triple locking snap hook | |
US9039055B1 (en) | Clevis type hook with safety latch | |
US5127219A (en) | Safety chain and latchable hook therefor | |
US4309052A (en) | Safety hook | |
US4071263A (en) | Coupling hook for a three-point connection on a tractor | |
US6523730B2 (en) | Locking device for ladders | |
WO2014108604A1 (en) | Lifting hook, safety latch of lifting hook and locking and releasing device of safety latch | |
US5573263A (en) | Automatic trailer hitch lock | |
JP2010081902A (en) | Connecting tool for animal | |
US6092825A (en) | Flatbar fifth wheel release handle | |
CA2528835A1 (en) | Chain hook lock | |
WO2006001714A1 (en) | A tensioning apparatus | |
AU2019331034A1 (en) | Double locking hook | |
US20120096995A1 (en) | Self-adjusting locking pliers with rear retainer | |
US11859692B2 (en) | Hook assembly with closure system | |
US3601864A (en) | Chain tensioner | |
GB2079704A (en) | A coupling pin | |
EP1728710B1 (en) | Fifth wheel coupling | |
EP1382467A1 (en) | Coupling device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |