发明名称 |
SOLENOID-OPERATED VALVE MEANS FOR HYDRAULIC SYSTEMS |
摘要 |
<p>In an hydraulic system a solenoid-operated valve mechanism is used to control delivery of pressure fluid to a part of the system, the fluid being circulated by a pump from a reservoir through the valve mechanism and back. The valve mechanism has a solenoid-operated valve biassed open, and closed when the solenoid is energized to generate pressure fluid, the valve then being operated in response to the pressure and a pressure-responsive valve-opening mechanism, such that when the pressure rises above a first threshold level the pressure acts to keep the valve closed, until the pressure reaches a second threshold level at which the valve-opening mechanism is operative to cause the valve to open provided the solenoid is de-energized. The valve-opening mechanism comprises a valve which opens at the second threshold level to allow pressure fluid into a cavity defined by a piston to cause the pressure to fall and the valve to open.</p> |
申请公布号 |
DE3170528(D1) |
申请公布日期 |
1985.06.20 |
申请号 |
DE19813170528 |
申请日期 |
1981.10.16 |
申请人 |
LUCAS INDUSTRIES PUBLIC LIMITED COMPANY |
发明人 |
HARRISON, ANTHONY WILLIAM |
分类号 |
F16K31/06;B60G17/015;B60G17/056;(IPC1-7):B60G17/04;F16K17/00;F15B13/02 |
主分类号 |
F16K31/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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