Webbing stretching device
US4471918A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/468
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A small spiral spring and a large spiral spring are provided coaxially with a webbing takeup shaft. During normal running condition of a vehicle, a trigger means prevents rotation of a working ring subjected to a biasing force of the large spiral spring, the working ring is separated from the takeup shaft by a clutch means, and a weak biasing force of the small spiral spring acts on the takeup shaft. In an emergency situation of the vehicle, the trigger means permits the working ring to rotate and the clutch means connects the working ring to the takeup shaft, whereby the biasing force of the large spiral spring is imparted to the takeup shaft, so that a tensile force can be rendered to the webbing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.