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Helical splined rotary actuator

  • US 4,745,847 A
  • Filed: 09/03/1987
  • Issued: 05/24/1988
  • Est. Priority Date: 09/03/1987
  • Status: Expired due to Fees
First Claim
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1. An actuator comprising a cylinder housing, a piston axially movable in said housing, means for causing relative rotation between said piston and housing during axial movement of said piston relative to said housing, a barrier sleeve extending coaxially into one end of said housing between said housing and said piston, said housing having internal seal means in sliding sealed engagement with the exterior of said barrier sleeve, and said piston having external seal means in sliding sealed engagement with the interior of said barrier sleeve, and means permitting relative axial movement between said piston and barrier sleeve but not relative rotational movement.

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