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Rotary actuator, a rotary actuator in a motor vehicle suspension, and a method of mass producing rotary actuators

  • US 5,601,165 A
  • Filed: 10/28/1994
  • Issued: 02/11/1997
  • Est. Priority Date: 11/05/1993
  • Status: Expired due to Fees
First Claim
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1. A sealing arrangement in a rotary actuator comprising:

  • cylinder means having at least two inwardly radially extending opposed ribs;

    shaft means rotatable about a confined arc within the cylinder means, said shaft means including at least two radially extending opposed vanes, each of said ribs and vanes including a longitudinal groove and a longitudinally extending seal within each groove;

    said cylinder means comprising a longitudinally extending recess in an interior wall of the cylinder means on at least one side of each rib, said recesses being adjacent to the ribs;

    said shaft means including longitudinally extending shaft recesses on at least one side of each vane, said shaft recesses being adjacent to the vanes;

    each of said seals being radially compressed between said shaft means and said cylinder means during operation of the rotary actuator; and

    each of said recesses and said shaft recesses being dimensioned to correspond to the thickness of each seal and being dimensioned to relieve at least a portion of the compression of each seal.

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