Air spring position switch
US4677263A · kind A · utility
20Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Jul 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S280/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A position switch is set forth which is adapted to generate a signal whenever two masses, such as a vehicle sprung and unsprung mass, are at or nearer than a desired spacing. The switch includes a grounded, conical, coiled spring attached to one mass, and an electrically charged plate secured to the other mass. The spring has a relaxed length to lie adjacent the plate when the masses are at the desired spacing. When the masses are brought together the spring contacts the plate, is compressed, and the plate is grounded generating a current signal indicating that the masses are at or nearer than the desired spacing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.