Cam driven wedge braking system for multi-stage lifts
US9561942B2 · kind B2 · utility
1Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2012 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Oct 5, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F17/003
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Apparatus for braking relative vertical movement between two vertical members includes linkage connected either directly or indirectly to a cable pulley-mount that is spring loaded and moves cams that wedge in between two vertically moveable members when cable tension is not present at the pulley. A broken cable, for example, will create a situation where there is no cable tension between a plurality of cable pulleys, the lack of cable tension moves the mechanical cam style linkage to engage the braking members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.