Seat belt pre-tensioner
US4999004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/11
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pre-tensioner arrangement applies tension to a safety belt in response to deceleration of a vehicle. A spring stores a force which is to be applied to the safety belt. A trigger mechanism comprises a lever which exhibits a mechanical advantage, one end of the lever engaging the spring, or an element associated with the spring, to retain the spring in a compressed state, and the other end of the lever engaging an over-dead-center linkage. An inertia mass is provided to engage the over-dead-center linkage to move it through the dead-center condition to release the lever and cause the spring to be released when severe deceleration is experienced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.