Load limiting seat belt retractor with spiral turn limiter
US9469272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2014 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Aug 7, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/286
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A motor vehicle seat belt retractor having load limiting features for controlling seat belt restraint loads for a retractor having a spool for storing belt webbing and rotatable with respect to a retractor frame, and a locking mechanism for locking the spool to provide vehicle occupant restraint. A load limiting element coupled with the spool limits restraint loading of the seat belt webbing upon locking of the spool. A rotational displacement limiting mechanism limits the displacement of the load limiting element, the limiting mechanism having a cam forming a spiral flight rotatable with the load limiting element and a cam follower engaging the spiral flight. The cam and the cam follower interengage to reach an end position preventing further relative angular displacement beyond a predetermined angular displacement of the load limiting element. Embodiments provide various configurations for the cam and cam follower elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.