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Powered drive assembly

  • US 6,038,819 A
  • Filed: 08/05/1997
  • Issued: 03/21/2000
  • Est. Priority Date: 08/05/1997
  • Status: Expired due to Fees
First Claim
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1. A drive assembly for positioning a slidable member within in a frame, the drive assembly comprising:

  • a motor assembly;

    a drive housing having a longitudinal bore formed therethrough, said drive housing securable to the frame such that said longitudinal bore is substantially parallel to a direction of movement of the slidable member;

    a drive cable having a first end rotatably coupled to said motor assembly and extending therefrom and a drive portion disposed within said longitudinal bore and supported for rotation in said drive housing;

    a coupling bracket having a first portion securable to the slidable member and a second portion engaging said drive portion of said drive cable; and

    a drive interface having a helical surface formed on one of said drive portion and said second portion and a protuberance formed on another of said drive portion and said second portion, said protuberance engaging said helical surface such that rotation of said motor assembly rotates said drive portion within said longitudinal bore and axially drives said coupling bracket along said housing in said direction of movement.

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