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Vehicle seat track apparatus

  • US 4,432,583 A
  • Filed: 04/01/1981
  • Issued: 02/21/1984
  • Est. Priority Date: 04/01/1981
  • Status: Expired due to Term
First Claim
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1. A power seat track mechanism for horizontally moving the seat of a motor vehicle in a forward and rearward sense and for elevating the front end of the seat and elevating the rear end of the seat, the mechanism including laterally spaced apart first and second rail members stationarily secured to the vehicle, a movable carriage comprised of a track member engaged with each rail member for constraining the carriage to said forward and rearward horizontal movement, motor drive means for elevating said seat, front elevating structure operated by said motor drive means for elevating the front end of the seat substantially independently of elevation of the rear end of the seat, rear elevating structure operated by said motor drive means for elevating the rear end of the seat substantially independently of any operation of the front elevating structure, a seat back mounted on said carriage for horizontal movement therewith, the mounting of said seat back being independent of both seat elevating structures, a pivotal link at the front end of the seat interfacing between the front elevating structure and the seat, said link having a pivotal mounting to said carriage and to a section affixed to said seat, said link movable about its carriage mounting on operation of the front drive structure to move the front end of the seat upwardly and a limited amount rearwardly during elevation of the front end of the seat, and a second link at the rear end of the seat with one section of the second link affixed to the carriage and a second section spaced from said one section coupled to the rear end of the seat through a lost motion connection to enable said limited rearward movement of the seat on elevation of the front end of the seat, and further comprising a torsion bar at each seat end, each said torsion bar affixed to a link at the respective seat end thereof, and in which there is a bracket supporting the seat adjacent the rear thereof, said bracket including an elongated horizontal slot supporting the torsion bar at the seat rear for effecting said lost motion connection.

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