Device for winding up a belt or web
US4084764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1977 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Apr 20, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/4426
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A dispenser for a retractable safety belt, to be used by the driver of a vehicle, comprises a holder in which a roller loaded by a retraction spring is journaled. The belt, anchored to the roller and partly wound around it, coacts with an insert in the form of a resilient ribbon which is coiled with the belt about the roller during at least an initial phase of a pull-out stroke and about a collateral axis alongside the belt during at least a final phase of that stroke of exert upon the belt a supplemental biasing force which either aids the force of the retraction spring in the initial phase or opposes it in the final phase. The changeover between the two phases can be brought about by a beginning windup of the free ribbon end, by a diversity of inherent stress in two longitudinally adjoining ribbon sections, or by a detent responsive to the coil diameter which holds the ribbon away from the belt in the final phase of pull-out and lets it rejoin the belt at an intermediate stage of the retraction step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.