Brake pressure control valves with fluid pressure responsive valve
US4049323A · kind A · utility
4Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1975 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Feb 19, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/226
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure control assembly comprises a control valve set for controlling communication between an inlet and an outlet, a control spring acting in a sense to resist closure of the valve set and a device for varying the control force of the control spring acting on the valve set. The device for varying the control force may comprise a differential pressure responsive member which moves in response to a differential pressure to move an abutment engaging the spring between normal and actuated positions to compress or expand the spring and thus vary its force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.