Method for regulating the traction in a line of a ladder climbing assistance device and ladder climbing assistance device
US7987945B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2005 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | May 30, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/186
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for regulating the traction in a line (13) of a ladder climbing assistance device, in which method any movement of the line (13) is sensed and in dependence of the sensed movement either increasing the traction in the line to a predetermined high level (L1), maintaining the traction at a predetermined high level (L1), or decreasing the traction to a predetermined low level (L0). Furthermore, a ladder climbing assistance device comprising a line (13) that is movable along the ladder (1) and a motor (8) with a power outlet arranged to provide an essentially constant traction in the line (13). The ladder climbing assistance device comprises sensing means (25) for sensing any movement of the line (13), which sensing means is connected to controlling means (26) for controlling the power outlet from the motor (8) in response to signals from the sensing means in the above-described manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.