Hydraulic rotary actuator
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United States of America Patent
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Aug 15, 2017
Issued Date -
N/A
app pub date -
Nov 19, 2014
filing date -
Feb 6, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic rotary actuator including a stator housing having a through bore to position a rotor assembly. A rotor assembly includes an output shaft and at least a first rotary piston member disposed radially about the output shaft. The rotary piston member includes an vane element. A continuous seal is disposed on peripheral longitudinal faces and lateral end faces of the rotary piston element. The bore through the stator housing includes an interior cavity with surfaces adapted to receive the rotor assembly and contact the continuous seal. With rotation fluid ports blocked, the housing cavity is sealed with the continuous piston seal for hydraulic blocking, preventing actuator displacement by external forces. A method of operation and method of assembly is disclosed.
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