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Height adjustment mechanism for a vehicle seat

  • US 4,074,886 A
  • Filed: 03/07/1977
  • Issued: 02/21/1978
  • Est. Priority Date: 03/07/1977
  • Status: Expired due to Term
First Claim
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1. A vehicle seat comprising,a seat frame,a seat cushion frame,two cushion-height adjustment mechanisms mounted on the seat frame at the front and back of the seat respectively and supporting the front and back of the seat cushion frame for independent movement upwards and downwards with respect to the seat frame,one of said height adjustment mechanisms comprisinghinge means pivoted to the seat frame and to the seat cushion frame respectively on horizontally-spaced parallel pivots extending laterally of the seat, to allow the cushion frame to be raised or lowered pivotally,a spring mounted on the seat frame and biassing the hinge means upwardly,two co-operating locking means comprising a pin, and a rack having teeth spaced apart vertically to receive the pin therebetween in vertically downward load-supporting relationship,means mounting one of said locking means on the seat frame,means mounting the other of said locking means on the hinge means and cushion frame assembly,one of the mounting means being a pivot on which the associated locking means is supported, andbiassing means acting on the pivotally supporting locking means to urge the two locking means into mutual engagement.

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