Pulley device

Patent metadata

Field	Value
Publication number	US-9617128-B2
Application number	US-201414584397-A
Country	US
Kind code	B2
Filing date	Dec 29, 2014
Priority date	Dec 27, 2013
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The pulley device comprises first and second pulleys each provided with a set of sheaves. The two pulleys are designed to be respectively fixed to a fixed point and to a person to be rescued. A rope is fixed to one of the two pulleys and arranged in such a way that the first pulley moves towards the second pulley when a pull is exerted on the rope. An enclosure connects the first pulley to the second pulley and surrounds the path of the rope between the two pulleys. One end of the rope extends outwards from the enclosure to enable a pull to be exerted on the end of the rope.

First claim

The invention claimed is:

1. A portable pulley device comprising:
a first pulley designed to be fixed to a fixed point and comprising a first set of at least one sheave,
a second pulley designed to be fixed to a person to be rescued and comprising a second set of at least one sheave,
a rope fixed to one of the first and second pulleys and arranged to connect the at least one sheave of the first pulley with the at least one sheave of the second pulley so that the first pulley moves towards the second pulley when a pull is exerted on the rope,
a deformable enclosure connecting the first pulley to the second pulley and surrounding a path of the rope between the first and second pulleys, one end of the rope extending outwards from the enclosure to enable the pull to be exerted on said end, the deformable enclosure being removably attached to the first pulley and the second pulley,
wherein the deformable enclosure is in direct contact with the first pulley and the second pulley.

2. The device according to claim 1 , wherein the deformable enclosure comprises:
a first portion in contact with the first pulley,
a second portion in contact with the second pulley and a third portion separating the first and second portions,

and wherein the first and second portions are formed from a first material which is more rigid than a second material forming the third portion.

3. The device according to claim 2 , wherein the third portion of the deformable enclosure is formed by a material drilled with holes.

4. The device according to claim 3 , wherein the third portion of the deformable enclosure is formed by a netting.

5. The device according to claim 3 , wherein the third portion of the deformable enclosure is formed by a textile material.

6. The device according to claim 2 , wherein the first portion of the deformable enclosure comprises a first hole collaborating with at least one hole of the first pulley configured to allow for insertion of a first removable connector and wherein the second portion comprises a second hole collaborating with at least one hole of the second pulley configured to allow for insertion of a second removable connector.

7. The device according to claim 6 , comprising the first removable connector and wherein the first hole of the first portion is arranged to allow passage of the first removable connector in the at least one hole of the first pulley.

8. The device according to claim 7 , comprising the second removable connector and wherein the hole of the second portion is arranged to allow passage of the second removable connector in the at least one hole of the second pulley.

9. The device according to claim 1 , wherein one of the first and second pulleys comprises a self-locking device configured to allow movement of the rope resulting in the two pulleys being moved towards one another and to block a movement of the rope in a opposite direction.

10. The device according to claim 1 , wherein the deformable enclosure is flexible in a first direction connecting the first pulley to the second pulley, and is flexible in a second direction different from the first direction.

11. The device according to claim 1 , wherein the deformable enclosure is flexible so as to allow the deformable enclosure to be folded or to allow torsion of a central part of the deformable enclosure.

12. The device according to claim 1 , wherein the deformable enclosure defines a tube having a first end plugged by the first pulley and a second end plugged by the second pulley.

13. The device according to claim 1 , wherein the deformable enclosure completely surrounds the rope in a plane perpendicular to an axis connecting the first pulley to the second pulley.

14. The device according to claim 1 , wherein the deformable enclosure comprises a textile material or a fabric.

15. The device according to claim 1 , wherein the deformable enclosure completely surrounds the first pulley and the second pulley in a plane perpendicular to an axis connecting the first pulley to the second pulley.

16. The device according to claim 1 , wherein the rope is fixed to the one of the first and second pulley inside the deformable enclosure.

Assignees

• Zedel

Inventors

• Maurice Alain
• Chabod Pierre-Olivier
• Bronnaz Alexandre

Classifications

• A62B1/14 Primary

  with brakes sliding on the rope · CPC title

• B66D3/02

  Manually-operated, e.g. lever-actuated, devices operating on ropes, cables, or chains for hauling in a mainly horizontal direction (B66D3/04, B66D3/12 take precedence) · CPC title

• B66D3/06 Primary

  with more than one pulley · CPC title

• B66D3/046

  Openable pulley blocks · CPC title

• B66D3/04

  Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage (sheaves F16H55/00) · CPC title