Seat belt pretensioner with brake
US6685124B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Mar 14, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/4666
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus (10) for helping to protect an occupant of a vehicle seat (14) comprises a seat belt (20) and a seat belt retractor (30) including a spool (60) supported for rotation about a spool axis (64) in a seat belt withdrawal direction (68) and an opposite seat belt retraction direction (66). An electric motor (110) is energizable to rotate the spool (60) in the seat belt retraction direction (66) and is de-energizable. The electric motor (110) is energizable to rotate the spool (60) in the seat belt retraction direction (66) to apply a predetermined amount of tension to the seat belt (20). An electrically actuatable brake (140) associated with the motor (110) is actuatable to maintain the predetermined amount of tension on the seat belt (20) after the motor applies the predetermined amount of tension to the seat belt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.