Viscous damped crash sensor unit with inertia switch
US4097699A · kind A · utility
20Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1976 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | Sep 7, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/142
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A crash sensor responsive to a predetermined change in velocity for activating a vehicular safety device. The present sensor has a gas-filled sealed tube having an inertial mass disposed therein in a closely fitting manner forming an annular orifice between the mass and the tube. The mass is preloaded and biased and, upon the tube experiencing a level of velocity change above a predetermined amount, movement of the mass in the tube to activate the set of electrical contacts is damped by viscous laminar flow of the gas through the annular orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.