Seat belt retractor
US7374122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2005 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | May 29, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/287
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A seat belt retractor has a rotating spool for retraction or pay-out of seat belt webbing. A locking ring is attached to one end of the spool. The locking ring is locked against rotation when a crash is sensed. A force limiting means allows further pay-out of the seat belt webbing after the locking ring has locked. Coupled in the force path between the spool and the locking ring, the force limiting means has a primary force limiting means; and a secondary force limiting means. The force limiting means include an elongate deformable member, arranged such that relative rotation between the spool and the locking ring causes a predetermined length of the deformable member to be deformed during a first stage of load limiting. The cross-sectional area of the deformable member is uniform over a major portion of the predetermined length and is reduced over at least one minor portion located a distance from the end of the member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.