Pretensioner drive
US6460794B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 2001 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | May 31, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/468
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pretensioner 10 for a seat belt 12 utilizes a perforated strap 34 loosely coiled about a hub 38 wherein the hub 38 is, in normal operation of a vehicle, rotatable with a webbing reel shaft 40. A plurality of protrusions 42 are circumferentially spaced about the hub and mesh with the perforated strap 34 upon activation of the pretensioner 10. The pretensioner 10 contains a first passage 44 and a second passage 46 for the respective containment of the hub 38 and an actuator 20, wherein each passage is formed perpendicular and in volumetric intersection with the other. The pretensioner 10 also contains a gas generant composition 22 in combustive communication with the actuator 20. Upon ignition, the gas pressure produced by the pyrotechnic 22 propels the actuator 32 into the strap 34, thereby effecting rotary advancement of the hub 38 and the shaft 40, and thus pretensioning the seat belt 12 wound about a spool 11 of a seat belt retractor 14, wherein the spool 11 is rotatably engaged with a second portion of the shaft 40 and thus provided in coaxial relation with the hub 38.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.