Adjustable seat support

Claim 1

IN AN ADJUSTABLE SEAT SUPPORT ASSEMBLY INCLUDING A LOWER BASE ELEMENT DISPOSED IN FORE-AND-AFT RELATION TO THE SEAT AND AN UPPER SEAT-MOUNTING ELEMENT OVERLYING THE BASE ELEMENT IN SPACED RELATION THERETO AND DEPENDING FROM THE SEAT IN FIXED FORE-AND-AFT RELATION THERETO, MEANS UNITARILY INTERCONNECTING THE ELEMENTS FOR INDEPENDENT ADJUSTMENTS OF THE RELATIVE SPACING OF THE FORWARD END PORTIONS OF THE LOWER AND UPPER ELEMENTS OR THE RELATIVE SPACING OF THE REARWARD END PORTIONS OF THE LOWER AND UPPER ELEMENTS OR THE FORE-AND-AFT RELATION OF SAID LOWER AND UPPER ELEMENTS, A COMMON MEANS FOR ADJUSTING THE RELATION OF THE ELEMENTS AS AFORESAID AND COMPRISING A DRIVE SHAFT ROTATABLY CARRIED BY THE ASSEMBLY, MEANS COOPERATIVE BETWEEN THE SHAFT AND DIFFERENT SAID ELEMENTS FOR SELECTIVELY AND OPERATIVELY CONNECTING SAID SHAFT WITH EITHER SAID ELEMENT, AND A ROCKABLY ADJUSTABLE SPINDLE MEMBER JOURNALED IN THE SUPPORT ASSEMBLY AND EXTENDING LATERALLY THEREFROM IN A LINE PARALLEL TO THAT OF THE SHAFT AXIS AND ACTUATABLE BY A HANDLE MEMBER DIRECTED RADIALLY FROM THE EXTENDING SPINDLE PORTION FOR ESTABLISHING A SAID OPERATIVE CONNECTION BETWEEN THE SHAFT AND THE SEATSUPPORT ASSEMBLY.