发明名称 |
High-low pressure pilot |
摘要 |
An extremely accurate and reliable fluid pressure sensor for monitoring process pressure and sensing when predetermined pressure set points or limits have been reached. A Bourdon tube with a pivotally moving lever end responds to the process pressure. When the process pressure is within the desired pressure range, a fluid operated block and bleed relay is operated to provide a first pressure level at its outlet. As the preset pressure point is reached, the relay is operated to provide a change in the outlet pressure level for actuating suitable safety units. A pivoting beam responds to pivoting movement of the Bourdon tube lever arm about the pressure set points and effectively amplifiers or increases such movement to rapidly operate the relay. Snap-acting cap means with a self-aligning disc cap a nozzle port in the relay in response to pivoting beam movement.
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申请公布号 |
US4616670(A) |
申请公布日期 |
1986.10.14 |
申请号 |
US19850725147 |
申请日期 |
1985.04.22 |
申请人 |
FISHER CONTROLS INTERNATIONAL, INC. |
发明人 |
DUFFY, JOHN W.;FUNKE, ROBERT A.;SHOLLENBARGER, DAVID W. |
分类号 |
G05D16/06;(IPC1-7):G05D16/00 |
主分类号 |
G05D16/06 |
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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