Harmonic screw actuator
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United States of America Patent
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Dec 10, 1985
Grant Date -
N/A
app pub date -
Jun 13, 1983
filing date -
Jun 13, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is disclosed an improved 'harmonic screw' type actuator wherein rotary motion of the power input component is converted into linear motion of the output component by means of a strain wave imposed upon a flexible sleeve member of the assembly, which is flexed into intermittent screw engagement by a member which is motor-driven to rotate relative to the periphery of the flexible sleeve; thereby causing progressively advancing/retreating inter-engagements of thread-like surfaces formed on the axially stationary and axially movable components of the system. A variety of automatic 'fail-safe' provisions are included as well as means for manual operation in power loss situations.
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