Dual-circuit pressure control valve
US4493508A · kind A · utility
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1Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 1, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Nov 1, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Dual-circuit pressure control valves are known in which the two control pistons are acted upon by a common preloading force through the intermediary of a preload distributor. The disadvantage of the known devices is that the valve closure travel is great resulting in a large fluid volume input to the control valve. According to the present invention this disadvantage is overcome by providing adjustable stops which cooperate with corresponding extensions of the distributor as soon as an unsymmetrical mode of operation of the valves occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.