Ski-lift seat return device
US8474743B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2010 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Aug 20, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61B11/004
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A ski-lift seat return device having a supporting structure; a reel mounted to rotate about an axis with respect to the supporting structure; a cable wound about the reel; a spring mechanism for opposing unwinding of the cable, and for rewinding the cable unwound off the reel; and a contactless magnetic brake connected to the reel and the supporting structure to adjust the brake torque as a function of the rotation speed of the reel; and wherein the magnetic brake has a first wall integral with and preferably defining part of the supporting structure; and a second wall connected movably to the reel and moved towards the first wall by the rotation speed of the reel; the first and second wall being coupled magnetically to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.