Hooking device for lifting loads comprising a secure ratchet

Patent metadata

Field	Value
Publication number	US-10532914-B2
Application number	US-201615779542-A
Country	US
Kind code	B2
Filing date	Nov 25, 2016
Priority date	Nov 27, 2015
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A device for lifting and transporting a load attached by a sling includes a hook comprising a throat opening intended to receive a loop on a sling. The device includes a latch that can pivot between an open position and a closed position in which said throat opening is obstructed. The device includes a locking device including a locked position in which said locking device prevents the latch from turning in the closed position, and an unlocked position in which the latch can rotate; a lever including a loaded position in which said lever holds the locking device in the locked position and a released position in which said lever does not hold said locking device. A rotation of the latch from the closed position to the open position triggers the lever from the loaded position to the released position.

First claim

The invention claimed is:

1. A device for lifting and transporting a load attached by a sling including a hook, of which a throat opening is intended to receive a loop or a ring on a sling, and including a latch that can rotate on a latch hinge pin between an open position in which the throat opening is unobstructed and a closed position in which said throat opening is obstructed, characterized in that said device includes:
a locking device including a locked position in which said locking device prevents the latch from rotating in the closed position for said latch, and including an unlocked position in which the latch can rotate;
a lever including a loaded position in which said lever holds the locking device in the locked position and a released position in which said lever does not hold said locking device, which is driven to the locked position by a locking device spring; and characterized in that a rotation of the latch from the closed position to the open position triggers the lever from the loaded position to the released position.

2. A device according to claim 1 in which the latch includes a striker plate arranged on said latch to allow for the striker to connect with said striker plate, in the closed position of said latch, only when the latch is in the closed position.

3. A device according to claim 2 in which the locking device is assembled on a slide in such a manner that the striker is opposite the striker plate on the latch when said latch is in the closed position and such that said striker enters into said striker plate by a movement in a substantially linear direction in relation to the locking device.

4. A device according to claim 1 in which a latch spring applies pressure to return the latch to the closed position.

5. A device according to claim 1 in which, in the loaded position, a restraint of the locking device is resting on a bearing surface of the lever to hold said locking device in the unlocked position.

6. A device according to claim 1 in which when the latch pivots on the latch hinge pin it drives a cam that acts on a ramp on the lever to move said lever from the loaded position when the latch is in the closed position to a released position when the latch is pivoted to the open position.

7. A device according to claim 1 in which the locking device is assembled to pivot in such a manner that the striker is opposite the striker plate when the latch is in the closed position and such that said striker enters into said striker plate when the locking device pivots around a locking device hinge pin.

8. A device according to claim 1 in which a reloading control is arranged to move the locking device, when the latch is locked, and to drive the movement of the lever, under the effect of a lever spring, from the released position to the loaded position.

9. A device according to claim 1 in which a structure envelopes the device including two flanges between which are arranged the hook, the latch, the locking device and the lever.

10. A device according to claim 1 in which the latch has a contact surface on which a loop or ring at the end of a sling slides when said loop or ring is attached on the arm of the hook, and pivots the latch to the open position.

11. A device according to claim 1 in which the open position of the latch corresponds with pivoting said latch upwards, in the working position of the device, to allow it to switch to the bottom of the hook to uncover the throat opening without unlocking the latch.

12. A device according to claim 1 in which a locking device position detector sends information on whether the latch is in the locked or unlocked position.

13. A device for lifting and transporting a load attached by a sling including a hook, of which a throat opening is intended to receive a loop or a ring on a sling, and including a latch that can rotate on a latch hinge pin between an open position in which the throat opening is unobstructed and a closed position in which said throat opening is obstructed, characterized in that said device includes:
a locking device including a locked position in which said locking device prevents the latch from rotating in the closed position for said latch, and including an unlocked position in which the latch can rotate;
a lever including a loaded position in which said lever holds the locking device in the locked position and a released position in which said lever does not hold said locking device, which is driven to the locked position by a locking device spring;
and characterized in that a rotation of the latch from the closed position to the open position triggers the lever from the loaded position to the released position, in which in said loaded position, a restraint of the locking device is resting on a bearing surface of the lever to hold said locking device in the unlocked position, and
wherein, when the latch pivots on the latch hinge pin it drives a cam that acts on a ramp on the lever to move said lever from the loaded position when the latch is in the closed position to a released position when the latch is pivoted to the open position, and in which the lever is assembled to pivot in such a manner that in the loaded position the restraint is resting on the bearing surface when the latch is in the closed position, and pivots on a lever hinge pin to move the bearing surface and release the restraint.

14. A device for lifting and transporting a load attached by a sling including a hook, of which a throat opening is intended to receive a loop or a ring on a sling, and including a latch that can rotate on a latch hinge pin between an open position in which the throat opening is unobstructed and a closed position in which said throat opening is obstructed, characterized in that said device includes:
a locking device including a locked position in which said locking device prevents the latch from rotating in the closed position for said latch, and including an unlocked position in which the latch can rotate;
a lever including a loaded position in which said lever holds the locking device in the locked position and a released position in which said lever does not hold said locking device, which is driven to the locked position by a locking device spring;
and characterized in that a rotation of the latch from the closed position to the open position triggers the lever from the loaded position to the released position, in which in said loaded position, a restraint of the locking device is resting on a bearing surface of the lever to hold said locking device in the unlocked position, and
wherein, when the latch pivots on the latch hinge pin it drives a cam that acts on a ramp on the lever to move said lever from the loaded position when the latch is in the closed position to a released position when the latch is pivoted to the open position, and
in which the lever is assembled on a slide in such a manner that in the loaded position the restraint is resting on the bearing surface when the latch is in the closed position, and moves in a linear manner to move the bearing surface and release the restraint when the latch is pivoted in the open position of said latch.

Assignees

• Indraero Siren
• Lisi Aerospace

Inventors

• Autissier Christophe
• Meyniel Guillaume

Classifications

• B66C1/36 Primary

  with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads · CPC title

• B64D1/22 Primary

  Taking-up articles from earth's surface · CPC title