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Linear actuator with threaded captivation sleeve, captive lead screw, and spring pre-load adjustment

  • US 6,603,229 B1
  • Filed: 11/15/2000
  • Issued: 08/05/2003
  • Est. Priority Date: 11/15/2000
  • Status: Expired due to Term
First Claim
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1. A linear actuator, comprising:

  • (a) front and rear end bells;

    (b) a stator structure;

    (c) a rotor structure having first and second bearings journaled, respectively, in cavities formed in inner surfaces of said front and rear end bells;

    (d) a captivation sleeve having its proximal end threadedly inserted in a cavity formed in an outer surface of said front end bell;

    (e) all foregoing elements being coaxially aligned to permit the insertion therethrough of a lead screw inserted through coaxially aligned foregoing elements, said lead screw having a threaded portion extending through said rotor structure and a splined portion extending through said captivation sleeve; and

    (f) a cylindrical anti-rotation bearing fixedly inserted in a distal end of said captivation sleeve, said anti-rotation bearing having an opening coaxial with said foregoing elements.

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