Warning device for passive seat belt system
US4943087A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1989 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Apr 21, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/4816
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A warning device for a passive seat belt system is disclosed. It includes an emergency release buckle; a tongue; a magnet displaceable between a first position and a second position, said magnet assuming the first position while the tongue and buckle are latched but a second position while the tongue and buckle are unlatched; an anchor base member; and a magnetic flux sensor for detecting a magnetic flux from the magnet. In a preferred embodiment, the warning device further includes a magnetic shielding means made of a high-permeability material and allowing magnetic flux to pass under low magnetic resistance to the magnetic flux sensor except for an area on a magnetic-flux-travelling path extending from the magnet to the sensor. In another preferred embodiment, the magnet may be arranged between the anchor base member and the buckle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.