Retractor-lap pretensioner with single micro-gas generator
US8678440B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Dec 20, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/3424
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A dual spool retractor device for seat belts in a motor vehicle including a frame, two spools rotatably mounted to the frame, and a pretensioning system providing pretensioning rotation for both the spools. The spools are pretensioning through the activation of a micro-gas generator. The gas generator can provide gas to a single or a pair of gas cylinders. One or more flexible numbers such as a metal band or cable is used which is coupled to one or both spools via a pulley. Activation of the gas generator forces a piston to move in a manner which exerts tension on the flexible member(s) thereby unwinding the flexible member from the spool pulley and providing pretensioning rotation of the respective belt spool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.