Rotary actuator
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United States of America Patent
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Oct 27, 1992
Issued Date -
N/A
app pub date -
Jun 12, 1991
filing date -
May 9, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotary actuator includes a cup-shaped piston which is movable back and forth and rotatable on its axis. A driving shaft has on its circumferential face a threaded area engaging with a threaded internal face of the cup-shaped piston. The driving shaft can be rotated on its axis during rectilinear motion of the cup-shaped piston. A rotary member has an area engaging with an outer portion of the cup-shaped piston. A casing accommodates the cup-shaped piston, the driving shaft, and the rotary member. The casing has a slit which can be tightened for securing the rotary member to the casing. A regulating member limits the length of strokes of the cup-shaped piston.
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