Device for tightening a seat belt
US7793982B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2008 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Mar 17, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/4661
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A device for tightening a seat belt has a piston (2) drivable linearly in a piston guide (1) by the gas pressure of a propellant gas. A gearing (3) is also caused to move by the piston (2), the gearing serving the transmission of the piston movement to a pinion (4). The pinion (4) is connected to, or configured to be connected to, a belt spool of a seat belt retractor (13) in a manner whereby rotation of the pinion causes rotation of the belt spool. The gearing (3) on associated with the piston (2) is mounted displaceable transversely to the piston's direction of movement and meshes with the pinion (4) as a result of gas pressure in an expandable bladder (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.