Seat belt pretensioner
US7147251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2005 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Jul 20, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R22/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pretensioner for a three point seat belt has a cylinder adapted to be attached to a structural member of a vehicle and a piston disposed within the cylinder. A pyrotechnic means moves the piston in a direction that is longitudinal relative to the cylinder in a pretensioning direction. A slider bar is oriented substantially parallel to a longitudinal axis of the cylinder. A seat belt webbing is looped around the slider bar such that the seat belt webbing can freely move along a portion of the slider bar that is oriented substantially parallel to a longitudinal axis of the cylinder so long as the pyrotechnic means for moving the piston has not been activated. A cable extends from the piston and loops around the seat belt webbing to cause the seat belt webbing to move along the slider bar in a pretensioning direction when the pyrotechnic means for moving the piston is activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.