Hydraulic servo valve
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United States of America Patent
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May 7, 2019
Grant Date -
Aug 10, 2017
app pub date -
Feb 1, 2017
filing date -
Feb 9, 2016
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Abstract
A servo valve including a piezo-electric actuator, a flexible linkage, and control valves. The piezo-electric actuator is actuatable along a piezo stack axis. The flexible linkage is coupled to the piezo-electric actuator at opposite axial ends of the actuator. Control valves are disposed at laterally opposite sides of the piezo stack axis and include respective valve stems coupled to the flexible linkage. The flexible linkage may be configured to transfer motion of the piezo-electric actuator along the piezo stack axis to a motion of the valve stems along an amplification axis that is transverse to the piezo stack axis to open and close the control valves. A symmetric actuation element incorporating the piezo-electric actuator, or a different actuator, may have first and second chambers at laterally opposite sides thereof, and be electrically actuatable along an actuation axis to open and close supply and return ports to control fluid communication with respective first and second work ports of respective first and second chambers.
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Patent Owner(s)
- PARKER-HANNIFIN CORPORATION
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Chaudhary, Anuj | Cypress, US | 4 | 4 |
Massie, Daniel Christopher | Mission Viejo, US | 2 | 8 |
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