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Linear actuator release mechanism and electronic cruise control based thereon

  • US 4,569,239 A
  • Filed: 07/06/1983
  • Issued: 02/11/1986
  • Est. Priority Date: 07/06/1983
  • Status: Expired due to Fees
First Claim
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1. A linear actuator comprising:

  • an elongated rod;

    electrically controlled drive means for axially reciprocating said rod without substantially rotating said rod;

    coupling means for releasably coupling said rod with an element to be reciprocated thereby, said coupling means including an attachment member adapted to be secured to the element, said coupling means further including axial locking means for axially locking said rod and said attachment member when said rod and said attachment member are in a locked angular relation and for axially unlocking said rod and said attachment member when said rod and said attachment member are in an unlocked angular relation;

    electrically controlled angular shifting means for angularly shifting at least one of said rod and said attachment member to position said rod and said attachment member in said locked and unlocked angular relations; and

    bias means for biasing at least one of said rod and said attachment member toward said unlocked angular relation, whereby the coupling means is unlocked in case of electrical power malfunction.

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