Fluid pressure actuator
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United States of America Patent
Stats
-
Apr 9, 1985
Grant Date -
N/A
app pub date -
Apr 20, 1983
filing date -
Apr 20, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piston member is mounted in a cylinder body to be axially movable and unrotatable relative thereto. A ball nut retaining balls is fixed to the piston member, and a screw shaft having a helical groove in engagement with the balls is mounted to be rotatable and axially immovable relative to the cylinder body. The screw shaft makes many rotations when the piston under fluid pressure slightly advances axially inside the cylinder.
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