发明名称 |
LOW ENERGY FLUID ACTUATOR CONTROL ELEMENT |
摘要 |
A pilot valve is disclosed. In one embodiment, it comprises: an input passageway, an output passageway, a rotatable shaft disposed between them, a permanent magnet affixed to the rotatable shaft, an electromagnet, a control element, and a failsafe magnet. The rotatable shaft has a slot that gives the rotatable shaft a varied cross-section as a function of its position. The slot is disposed to permit fluid to flow between the input passageway and the output passageway except when the rotatable shaft is in a closed position. The electromagnet is disposed to generate first magnetic field that, via the permanent magnet, drives the rotatable shaft away from the closed position. The control element places a PWM current on the electromagnet, such that the length of the duty cycle controls the strength of the first magnetic field. The failsafe magnet is disposed to generate a second magnetic field that drives the rotatable shaft away from the closed position. |
申请公布号 |
WO2005086807(A3) |
申请公布日期 |
2006.01.12 |
申请号 |
WO2005US07554 |
申请日期 |
2005.03.08 |
申请人 |
MASCO CORPORATION OF INDIANA;VINCENT, RAYMOND, A.;SCHMITT, RANDALL, P. |
发明人 |
VINCENT, RAYMOND, A.;SCHMITT, RANDALL, P. |
分类号 |
F16K31/12 |
主分类号 |
F16K31/12 |
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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