Strap retractor assembly
US4489804A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Jan 11, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/4473
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A strap retractor assembly of a seat belt arrangement including a retaining strap to be fitted to an occupant of a seat in a vehicle, comprising a reel shaft having the retaining strap anchored thereto; a drive motor for driving the reel shaft for rotation in direction to have the retaining strap unwound from and re-wound on the reel shaft; pulse generators to produce first pulses in response to rotation of the reel shaft in one direction and second pulses in response to rotation of the reel shaft in the other direction; a pulse counter to count the first pulses forwardly and the second pulses backwardly for producing an information signal representative of the number of the pulses counted; a reference signal generator to produce a reference signal variable with a preselected parameter and representative of a number of pulses corresponding to a desired degree of slackness of the strap; comparators to produce a signal when the number of the pulses represented by the information signal is in a predetermined relationship to the number of pulses represented by the reference signal; and a signal processing network to process the signals and pulses delivered from the pulse generators and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.