Wheeled hand truck with transverse extension means and cam elevating means

Claim 1

IN A HAND TRUCK ADAPTED TO BE DISPOSED UNDER A FLOOR SUPPORTED LOAD FOR RAISING THE LOAD OFF THE FLOOR AT ONE LOCATION AND MOVING IT TO ANOTHER LOCATION THEREON, THE COMBINATION OF A FRAME STRUCTURE HAVING A PAIR OF OPPOSED SIDE RAILS AND A PAIR OF OPPOSED END RAILS TRANSVERSE TO SAID SIDE RAILS AND CONNECTED THERETO ADJACENT OPPOSITE ENDS THEREOF, SAID END RAISL EACH COMPRISING A PLURALITY OF MEMBERS LONGITUDINALLY ADJUSTABLE ALONG EACH OTHER FOR TRANSVERSE ADJUSTMENT OF SAID FRAME STRUCTURE TO VARIOUS WIDTHS, A PLURALITY OF WHEEL DEVICES SUPPORTING SAID FRAME STRUCTURE AND MOVABLE ALONG SAID FLOOR, ELEVATOR MEANS CARRIED BY SAID SIDE RAILS FOR COOPERATION WITH A LOAD TO BE MOVED, AID ELEVATOR MEANS HAVING SLOTS THEREIN, MEANS ON SAID SIDE RAILS EXTENDING THROUGH SAID SLOTS FOR PREVENTING ACCIDENTAL SEPARATION OF SAID ELEVATOR MEANS AND SAID SIDE RAILS, MEANS COUPLED TO SAID ELEVATOR MEANS FOR ACTUATING SAID ELEVATOR MEANS TO ENGAGE AND DISENGAGE THE LOAD WHILE SAID TRUCKOVER SAID FLOOR, AND MEANS FOR MANIPULATING SAID TRUCK OVER SAID FLOOR, SAID MANIPULATING MEANS BEING COUPLED TO SID ELEVATOR ACTUATING MEANS FOR ALSO OPERATING SAID ELEVATOR ACTUATING MEANS.