发明名称 |
CANTILEVER BEAM POSITIONER FOR VALVE ACTUATORS |
摘要 |
<p>CANTILEVER BEAM POSITIONER FOR VALVE ACTUATORS A pneumatic valve actuator having a rotatable output shaft is provided with a valve positioner comprising an axially displaceable spool valve and a pneumatic transducer responsive to applied signal air pressure for displacing the spool valve away from a neutral position to effect rotation of the actuator output shaft. The actuator output shaft is gear-connected to an element which rotates with the output shaft, and an elongated cantilever beam spring attached at one end to the rotatable element extends in a direction transverse to the axis of rotation of said element to the transducer for providing a feedback force which balances the control signal responsive transducer force when the actuator output shaft has rotated to a desired position.</p> |
申请公布号 |
CA1103645(A) |
申请公布日期 |
1981.06.23 |
申请号 |
CA19790338113 |
申请日期 |
1979.10.22 |
申请人 |
WORCESTER CONTROLS CORPORATION |
发明人 |
GONZALEZ, RICARDO;SUMNER, CHARLES A.;SANCTUARY, ROBERT E. |
分类号 |
F16K31/00;(IPC1-7):15B13/16 |
主分类号 |
F16K31/00 |
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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