Adjustable support for vehicle seat

Claim 1

A SEAT ADJUSTER MECHANISM COMPRISING A SEAT FRAME, A FIXED SUPPORT, ADJUSTMENT MEANS FOR MOVING SAID SEAT FRAME LONGITUDINALLY COMPRISING STATIONARY TRACK MEANS CONNECTED TO SAID FIXED SUPPORT AND A MOVABLE SLIDE CONNECTED TO SAID SEAT FRAME SLIDABLY MOUNTED ON SAID STATIONARY TRACK MEANS, ANTI-FRICTION MEANS BETWEEN SAID TRACK MEANS, AN UPWARDLY EXTENDING BRACKET CARRIED BY SAID SLIDE INTERMEDIATE THE FRONT AND REAR ENDS THEREOF, AN ELONGATED LEVER ARRANGED SUBSTANTIALLY PARALLEL TO SAID TRACK MEANS AND SLIDE, SAID LEVER HAVING AN INTERMEDIATE PORTION THEREOF CONNECTED TO SAID BRACKET, MEANS CONNECTING THE REAR END OF SAID LEVER TO THE REAR END PORTION OF SAID SEAT FRAME, OPERATING MEANS CARRIED BY SAID MOVABLE SLIDE FORWARDLY OF SAID BRACKET AND INCLUDING A HOUSING AND A PAIR OF VERTICALLY EXTENDING SCREW JACK MEANS COMPRISING SCREWS MOUNTED IN SAID HOUSING, VERTICALLY DISPLACEABLE NUTS SUPPORTED ON SAID SCREW FOR LONGITUDINAL MOVEMENT THEREON, MEANS CONNECTING ONE OF SAID NUTS TO THE FRONT END PORTION OF SAID SEAT FRAME AND THE OTHER OF SAID NUTS TO THE FRONT END OF SAID LEVER, AND ACTUATING MEANS TO EFFECT INDEPENDENT RELATIVE ROTATION BETWEEN EACH OF SAID NUTS AND THE SCREW ON WHICH IT IS MOUNTED TO INDEPENDENTLY VERTICALLY DISPLACE THE FRONT AND REAR OF SAID SEAT FRAME.