Seat-belt retractor
US6921041B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | May 8, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/468
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A seat-belt retractor is provided wherein no further belt retraction is necessary to unlock the belt spool following a tensioning of the belt webbing. Specifically, the seat-belt retractor has a belt spool that is rotatably mounted in a frame and a coupling pawl that is pivotally mounted on one face of the belt spool. The drive wheel is mounted in the frame co-axially with the belt spool. The drive wheel has an annular internal toothing extending around the coupling pawl. The coupling pawl has a free end shaped with a coupling tooth or a pair of coupling teeth and is movable, in a tension-released condition of belt webbing, from an engagement position where the coupling tooth or teeth is or are engaged in a tooth gap or two adjacent tooth gaps of the internal toothing, to a release position disengaged from the internal toothing. The electric motor has an output shaft connected to the drive wheel through a self-locking gear transmission that inhibits rotation of the drive wheel other than through rotation of the output shaft of the electric motor. By virtue of the self-locking feature of the gear transmission, the coupling pawl with the annular internal toothing of the drive wheel c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.