Door latch assembly

  • US 5,259,652 A
  • Filed: 12/31/1990
  • Issued: 11/09/1993
  • Est. Priority Date: 12/31/1990
  • Status: Expired due to Term
First Claim
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1. A latch assembly comprising:

  • a housing defining an interior and an opening at one end of said housing communicating with said interior;

    a latch element disposed in said housing interior comprising a nose portion and a body portion, said latch element being linearly reciprocatably movable relative to said housing between an extended position wherein said nose portion projects from said housing interior through said opening and a retracted position wherein said nose portion is retracted in said housing interior;

    means operatively associated with said latch element for moving said latch element from said extended position to said retracted position comprising hub means comprising two hub elements having a notch therein independently rotatably mounted relative to said housing and adapted to be rotated by actuator means accessible outside said housing, operating means operatively associated with said hub means mounted within said housing for movement in a linear direction in response to rotation of said hub means, a drawbar attached to said latch element and operatively associated with said operating means through a latch lever pivotally mounted in said housing to cause retraction of the latch element during linear movement of said operating means toward said latch element; and

    means for selective engagement of either or none of said hub elements to selectively secure one of said hub elements against rotation comprising a pawl laterally movable in said housing and engageable with one of said notches in one of said hub elements to prevent rotation of said engaged hub element, said latch element being movable from said extended position to said retracted position only upon rotation of a hub element which is not in engagement with said means for selective engagement.

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