Electrically operated actuator

  • US 5,979,199 A
  • Filed: 10/15/1997
  • Issued: 11/09/1999
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Fees
First Claim
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1. An electrically operated actuator for operating a lock, the lock having a bolt operably coupled to a drive bar, the actuator comprising:

  • a lever attached to the drive bar, said lever having an axis of rotation that is coaxial with an axis of rotation of the drive bar, said lever being pivotal from a first position wherein the bolt is retracted to a second position wherein the bolt is extended;

    a motor capable of rotating a threaded rod operably attached thereto in a clockwise and counterclockwise direction;

    an actuating arm screwed onto said threaded rod having a first protrusion on one end of said arm and a second protrusion on an opposite end of said arm;

    said arm having means to prevent rotation of said arm about said threaded rod;

    said actuating arm being positioned on said threaded rod with respect to said lever such that said first protrusion is capable of contacting and pivoting said lever to said first position and said second protrusion is capable of contacting and pivoting said lever to said second position; and

    fail-safe means for allowing said lever to attain said first position by forcing said first protrusion out of the path of said lever and for allowing said lever to attain said second position by forcing said second protrusion out of the path of said lever.

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