Linear seat belt pretensioner
US8528987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2012 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Apr 16, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R22/1955
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A linear seat belt pretensioner (10, 110, 210) has a frame (12; 112, 113; 212, 213) and an axial cavity (24, 60; 124, 160; 232) rigidly connected to the frame (12; 112, 113; 212, 213), a gas generator (20, 120, 220) in fluid communication with the axial cavity (24, 60; 124, 160, 232), and a piston (40, 140, 240) movably arranged in the axial cavity (24, 60; 124, 160; 232). An actuating profile (42, 142, 242) movable with the piston (40, 140) pulls a length of seat belt webbing (38, 238) into the frame (12; 112, 113; 212, 213) that corresponds to twice the piston stroke (D). The pretensioner device having a locking ramp arrangement (66, 70; 266, 290, 292) configured to form a one-way clutch allowing an increase and resisting a reduction of the length of belt webbing (38, 238) received by the pretensioner (10, 110, 210).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.