Lifting hook for locking to carabiner

Patent metadata

Field	Value
Publication number	US-11344106-B2
Application number	US-202017010856-A
Country	US
Kind code	B2
Filing date	Sep 3, 2020
Priority date	Sep 27, 2019
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

A lifting hook 100 (200, 250, 260, 270) has an inner leg 102, an outer leg 104, and a connecting part 106 connecting these legs. With respect to a worker equipped with a lever type carabiner 2(4), the inner leg 102 is located on the inner side close to the carabiner 2(4), and the outer leg 104 is located on the outer side far from the carabiner 2(4). The inner leg 102 and the outer leg 104 relatively have a height difference, and at least a portion 104main of the outer leg 104 is located higher than the inner leg 102.

First claim

What is claimed is:

1. A lifting hook comprising:
an inner leg and an outer leg, each of the inner leg and outer leg fixed to a rear end surface of a work tool with a power source, and each of the inner leg and the outer leg having a respective length that projects in a rearward direction away from the work tool; and
a connecting part having a length, the connecting part connecting free ends of the inner and outer legs to each other, wherein
when a worker equipped with a lever-type carabiner holds the work tool, the inner leg of the lifting hook is located on an inner side close to the carabiner while the outer leg is located on an outer side far from the carabiner,
the length of the inner leg is disposed along a first plane, and at least a portion of the length of the outer leg is disposed along a second plane that is elevated above the first plane relative to a horizontal axis of the rear end surface of the work tool so that the portion of the length of the outer leg is located higher than the inner leg, and
at least one of the respective lengths of the inner leg, the connecting part, and the outer leg is disposed along a plane that is at an angle relative to the horizontal axis of the rear end surface of the work tool.

2. The lifting hook according to claim 1 , wherein the worker is not twisting the wrist when the worker holds the work tool.

3. The lifting hook according to claim 1 , wherein the outer leg includes a first portion adjacent to the connecting part and a main functional part, and wherein the main functional part is located higher than the inner leg.

4. The lifting hook according to claim 3 , wherein the angle is an included angle (α) between the first portion and the main functional part, and the included angle (α) is greater than 90° and equal to or less than 170°.

5. The lifting hook according to claim 1 , wherein the lifting hook has a tapered shape.

6. The lifting hook according to claim 5 , wherein the lifting hook is designed such that when the carabiner holds the lifting hook and the worker holds the work tool, the inner leg is inclined in a direction away from the carabiner toward the connecting part in planar view.

7. The lifting hook according to claim 1 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 35° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 35° or less.

8. The lifting hook according to claim 2 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 35° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 35° or less.

9. The lifting hook according to claim 1 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 25° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 25° or less.

10. The lifting hook according to claim 2 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 25° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 25° or less.

11. The lifting hook according to claim 1 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 10° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 10° or less.

12. The lifting hook according to claim 2 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 10° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 10° or less.

13. The lifting hook according to claim 1 , wherein the lifting hook is manufactured by bending one rod.

14. A lifting hook comprising:
an inner leg and an outer leg, each of the inner leg and outer leg comprising a respective end fixed to a work tool with a power source, each of the inner leg and the outer leg having a respective length that projects in a direction away from the work tool, the work tool further comprising an inner side and an outer side, wherein the inner leg is disposed closer to the inner side and the outer leg is disposed closer to the outer side; and a connecting part having a length, the connecting part connecting free ends of the inner and outer legs to each other, the free ends being opposite the respective ends fixed to the work tool, wherein
at least one of the respective lengths of the inner leg, the connecting part, and the outer leg is disposed along a plane that is at an angle relative to a horizontal axis of the work tool, and
the length of the inner leg is disposed along a first plane, and at least a portion of the length of the outer leg is disposed along a second plane that is elevated above the first plane relative to the horizontal axis of the work tool so that the portion of the outer leg is located higher than the inner leg.

15. The lifting hook according to claim 14 , wherein the outer leg includes a first portion adjacent to the connecting part and a main functional part, and wherein the main functional part is located higher than the inner leg.

16. The lifting hook according to claim 15 , wherein an included angle (α) between the first portion and the main functional part is greater than 90° and equal to or less than 170°.

17. The lifting hook according to claim 14 , wherein the lifting hook has a tapered shape.

18. The lifting hook according to claim 14 , wherein the lifting hook is designed such that when the lifting hook is locked to or detached from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 35° or less.

19. The lifting hook according to claim 14 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 25° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 25° or less.

20. The lifting hook according to claim 14 , wherein the lifting hook is designed such that when the worker is in an act of locking the lifting hook to the carabiner, the worker twists the wrist to rotate the work tool by an angle of 10° or less and when the worker is in an act of detaching the lifting hook from the carabiner, the worker twists the wrist to rotate the work tool by an angle of 10° or less.

21. A lifting hook comprising:
an inner leg and an outer leg, each of the inner leg a

Assignees

• Yamabiko Corp

Inventors

• Nishimura Atsushi
• Maeno Takeshi
• Takeuchi Noriyuki

Classifications

• A45F5/1575

  Holders or carriers for portable tools · CPC title

• F16B45/036

  with an elastically bending closing member · CPC title

• F16B45/00

  Hooks; Eyes (if the attaching parts or means are concerned, groups F16B13/00, F16B15/00, F16B19/00, F16B25/00, F16B35/00, F16B47/00 take precedence; for hanging pictures or the like A47G1/16; towing hooks for ships B63B21/58; for hoisting or hauling purposes B66C; hooks or eyes with integral parts designed to facilitate quick attachment to cables or ropes at any point F16G11/14) · CPC title

• B23D57/023

  hand-held or hand-operated · CPC title

• F16M13/04 Primary

  for supporting on, or holding steady relative to, a person, e.g. by chains {, e.g. rifle butt or pistol grip supports, supports attached to the chest or head (apparatus or arrangements for taking photographs or for projecting or viewing them G03B)} · CPC title