Clamping pulley

Patent metadata

Field	Value
Publication number	US-11401138-B2
Application number	US-202017078763-A
Country	US
Kind code	B2
Filing date	Oct 23, 2020
Priority date	Oct 29, 2019
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A pulley includes a securing head and a first flange. A first shaft extends from the first flange. A sheave is mounted rotatable around the first shaft in one direction of rotation only. A cam is mounted able to move away from or towards the sheave. A spring is fitted to exert a force moving the cam towards the sheave. A handle is mounted on the first flange to move the cam between the first and second positions.

First claim

The invention claimed is:

1. A clamping pulley comprising:
a securing head,
a first flange fixed to the securing head,
a first rotation shaft extending from the first flange,
a first sheave mounted rotatable around the first rotation shaft, the first sheave being mounted rotatable in one direction of rotation only, and
a locking cam mounted movable with respect to the first sheave so as to move away from or towards the first sheave, the locking cam being mounted movable between a first position and a second position,
wherein:
the first rotation shaft is mounted fixed with respect to the first flange and to the securing head,
the locking cam is mounted movable with respect to the first flange and to the securing head,
a spring is fitted to exert a force on the locking cam moving the locking cam towards the first sheave, and
a handle is mounted on the first flange or on the securing head, the handle being functionally connected to the locking cam to move the locking cam between the first position and the second position, the handle being functionally connected to the locking cam by means of a set of cogs,

wherein the handle comprises a pin collaborating with a stop, the pin being designed to come into contact with the stop to form a mechanical connection between the handle and the locking cam and rotation of the handle generates a rotation of the stop and rotation of the locking cam and wherein the locking cam is associated with a first cog-wheel collaborating with a second cog-wheel forming the stop.

2. The clamping pulley according to claim 1 , wherein the first sheave comprises a groove defining at least a V-shaped cross-section.

3. The clamping pulley according to claim 2 , wherein the first sheave comprises a textured groove.

4. The clamping pulley according to claim 3 , wherein the first sheave comprises a faceted groove.

5. The clamping pulley according to claim 2 , wherein the locking cam is arranged to sink into the groove of the first sheave.

6. The clamping pulley according to claim 5 , wherein the locking cam has a textured work surface arranged facing the groove of the first sheave.

7. The clamping pulley according to claim 1 , wherein the locking cam is mounted rotatable around a second rotation shaft mounted fixed on the first flange or the securing head.

8. The clamping pulley according to claim 7 , wherein the first sheave is configured to allow rotation in a first direction of rotation and to prevent rotation in a second direction of rotation opposite from the first direction of rotation and wherein rotation of locking cam in the first direction of rotation makes the locking cam move towards the first sheave.

9. The clamping pulley according to claim 8 , wherein rotation of the handle in the first direction of rotation results in rotation of the locking cam in the second direction of rotation and rotation of the handle in the second direction of rotation results in rotation of the locking cam in the first direction of rotation.

10. The clamping pulley according to claim 8 , wherein the handle comprises a pin collaborating with a stop, the pin being designed to come into contact with the stop to form a mechanical connection between the handle and the locking cam and rotation of the handle generates a rotation of the stop and rotation of the locking cam.

11. The clamping pulley according to claim 1 , wherein the handle is mounted rotatable around a third rotation shaft mounted fixed on the first flange.

12. The clamping pulley according to claim 1 , wherein the pin passes through an aperture arranged in the first flange.

13. The clamping pulley according to claim 1 , wherein a second flange is mounted rotatable around the first rotation shaft between an open position enabling a rope to be inserted in or extracted from the sheave and a closed position preventing insertion or extraction of the rope, the sheave separating the first flange and the second flange.

14. The clamping pulley according to claim 1 , comprising:
a second sheave mounted rotatable around the first rotation shaft mounted fixed with respect to the first flange and to the securing head, the second sheave comprising a smooth groove and being configured to rotate in the first and second directions of rotation, the second sheave being separated from the first sheave by the first flange.

15. A haul system comprising a clamping pulley according to claim 1 and an additional pulley device provided with an additional support flange, an additional rotation shaft salient from the additional support flange and an additional sheave mounted rotatable around the additional rotation shaft, a rope being fixed to the clamping pulley for the additional pulley device and extending between the clamping pulley and the additional pulley device and pressing on at least the first sheave and the additional sheave.

16. A clamping pulley comprising:
a securing head,
a first flange fixed to the securing head,
a first rotation shaft extending from the first flange,
a first sheave mounted rotatable around the first rotation shaft, the first sheave being mounted rotatable in one direction of rotation only,
a locking cam mounted movable with respect to the first sheave so as to move away from or towards the first sheave, the locking cam being mounted movable between a first position and a second position,
wherein:
the first rotation shaft is mounted fixed with respect to the first flange and to the securing head,
the locking cam is mounted movable with respect to the first flange and to the securing head,
a spring is fitted to exert a force on the locking cam moving the locking cam towards the first sheave, and
a handle is mounted on the first flange or on the securing head, the handle being functionally connected to the locking cam to move the locking cam between the first position and the second position, the handle being functionally connected to the locking cam by means of a set of cogs, and wherein the locking cam rotates about a fixed pivot axis.

Assignees

• Zedel

Inventors

• Bonnet Guillaume
• Jourdan Marc

Classifications

• B66D3/10 Primary

  Applications of braking or detent devices · CPC title

• B66D2700/026

  Pulleys, sheaves, pulley blocks or their mounting · CPC title

• B66D3/046

  Openable pulley blocks · CPC title

• A62B1/10

  mechanically operated · CPC title