Vehicle seat adjuster

Claim 1

A VEHICLE SEAT ADJUSTER UNIT COMPRISING A VEHICLE SEAT, AN UPPER SUPPORT MEMBER SUPPORTING SAID SEAT, A LOWER SUPPORT MEMBER SECURED TO A VEHICLE FLOOR, FRONT AND REAR LINKAGES CONNECTED BETWEEN SAID MEMBERS FOR SELECTIVELY MOVING THE FRONT AND REAR OF THE SEAT IN A VERTICAL DIRECTION, SAID FRONT AND REAR LINKAGES BEING PIVOTALLY CONNECTED TO SAID UPPER SUPPORT MEMBER, HORIZONTAL ACTUATING MEANS FOR MOVING THE SEAT FORE AND AFT WHEREIN SAID LOWER SUPPORT MEMBER ACTS AS AN ELONGATED LOWER TRACK FOR RECEIVING A MULTI-SECTION UPPER TRACK CONSISTING OF FOUR SLIDE PLATES, EACH SLIDE PLATE PIVOTALLY SUPPORTING ONE LINK OF SAID LINKAGES, SAID SLIDE PLATES BEING DIVIDED INTO A FRONT PAIR CONSISTING OF THE TWO FRONT SLIDE PLATES AND A REAR PAIR CONSISTING OF THE TWO REAR SLIDE PLATES, THE FRONT PAIR OF SLIDE PLATES BEING CONNECTED TO LINKS OF THE FRONT LINKAGE AND THE REAR PAIR OF SLIDE PLATES BEING CONNECTED TO THE LINKS OF THE REAR LINKAGE, EACH PAIR OF SLIDE PLATES CONSISTING OF A FIRST SLIDE PLATE SUPPORTING A PINION WITH THE PINION BEING FREE TO ROTATE ABOUT ITS AXIS BUT SECURED FROM OTHER MOTION RELATIVE TO THE FIRST SLIDE PLATE AND A SECOND SLIDE PLATE BEING FORMED WITH A RACK ARM, THE PINION CONNECTED TO THE FIRST SLIDE PLATE BEING IN MESHING ENGAGEMENT WITH THE RACK ARM OF THE SECOND SLIDE PLATE SO THAT ROTATION OF THE PINION WILL MOVE THE SECOND SLIDE PLATE RELATIVE TO THE FIRST SLIDE PLATE IN A FORE AND AFT DIRECTION, EACH OF SAID LINKAGES CONSISTING OF TWO LINKS, A FIRST LINK HAVING ONE END PIVOTALLY CONNECTED TO SAID UPPER SUPPORT MEMBER AND THE OTHER END BEING PIVOTALLY CONNECTED TO ONE SLIDE PLATE OF THE PAIR OF SLIDE PLATES ASSOCIATED WITH THE LINKAGE, A SECOND LINK HAVING ONE END PIVOTALLY CONNECTED TO THE FIRST LINK INTERMEDIATE ITS ENDS AND THE OTHER END OF THE SECOND LINK BEING PIVOTALLY CONNECTED TO THE REMAINING SLIDE PLATE OF THE ASSOCIATED PAIR AND SELECTIVE POWER MEANS TO REVERSIBLY DRIVE THE PINIONS FOR RELATIVE MOVEMENT OF THE SECOND SLIDE PLATES RELATIVE TO THE FIRST SLIDE PLATES IN A FORE AND AFT DIRECTION WHICH WILL CAUSE THE FIRST LINKS AND SECOND LINKS TO COACT IN A SEMI-SCISSOR MOVEMENT THEREBY MOVING THE UPPER SUPPORT MEMBER IN A VERTICAL DIRECTION RELATIVE TO THE LOWER SUPPORT MEMBER AND REVERSIBLE POWER MEANS TO DRIVE A JACK SCREW PIVOTALLY CONNECTED BETWEEN THE LOWER SUPPORT MEMBER AND THE UPPER SUPPORT MEMBER FOR HORIZONTAL ADJUSTMENT OF THE SEAT ADJUSTER.