Belt retractor for vehicle safety belts
US5474247A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1994 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Nov 23, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R22/415
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The safety belt retractor comprises a frame, a belt drum rotatably supported in the frame, a locking mechanism for selectively locking the belt drum against rotation and a trip mechanism for activation of the locking mechanism. The trip mechanism has an externally toothed control disk mounted for limited relative rotation on the belt drum. A two-armed toggle lever is selectively pivotable on the frame between two stable positions. A planet wheel gearing has a sun wheel connected to the belt drum, an internally toothed ring gear fixed to the frame and a pair of planet wheels meshing with the sun wheel and the ring gear. The planet wheels have a peripheral toothing with an oversized tooth which extends radially beyond the toothing of the planet wheel. The toggle lever has one arm provided with an engagement member for engagement in the toothing on the control disk. Each oversized tooth directly urges on a different one of the toggle lever arms to pivot the lever from one to the other of the two stable positions in a predetermined orbital and rotational position of the respective planet wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.