Tire inflation-deflation system
US4765385A · kind A · utility
32Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Feb 27, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/36
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure-controlled remotely-operated valve for utilization in respective wheels of a vehicle, on-road, off-road type. The valve is functional to effect tire deflation or tire inflation in a stationary or moving vehicle. Multiple piston-valve elements are axially aligned in a multi-step recess of a housing, wherein the effective areas of two opposed valves differ in value whereby a first valve movable in a two-stage phase can move a second valve only under certain tire pressure conditions. A third valve operable by said first valve can connect tire pressure to exhaust upon action of the first valve in a first phase operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.