Expandable house trailer

Claim 1

AN EXPANDABLE TRAILER VEHICLE COMPRISING A MAIN UNIT WITH BOTTOM, SIDE WALLS, END WALLS AND A ROOF, ONE OF SAID SIDES HAVING AN OPENING MEDIALLY OF ITS LENGTH, A PAIR OF VERTICALLY DISPOSED SHAFTS ON OPPOSITE SIDES OF SAID OPENING, EACH HAVING A PINION ON BOTH ENDS, A HORIZONTALLY DISPOSED SHAFT CARRIED BY SAID TRAILER, BELOW SAID OPENING, BEVEL GEARS ON THE ENDS OF SAID HORIZONTALLY DISPOSED SHAFT MATING WITH BEVEL GEARS ON THE LOWER ENDS OF SAID VERTICALLY DISPOSED SHAFTS, A MOVABLE WING UNIT TELECOPICALLY RECEIVED IN SAID OPENING, AND COMPRISING A FLOOR, AN OUTER WALL, TWO SIDE WALLS AND A ROOF, AN OUTWARDLY DIRECTED FLANGE ON THE INNER EDGES OF SAID SIDE WALLS OVERLYING THE PERIMETER OF SAID OPENING TO PROVIDE A STOP MEANS, A VERTICALLY ADJUSTABLE OUTBOARD SUPPORT CARRIED BY SAID WING UNIT, AN UPPER AND LOWER RACK ON THE EXTERIOR OF EACH SIDE WALL OF SAID WING UNIT, MATING WITH THE RESPECTIVE SAID PINIONS, SAID RACKS HAVING SECTIONS OF EXTRA WIDTH MATING WITH SAID PINIONS IN THE EXTENDED POSITION OF SAID WING UNIT, AND JACK MEANS CARRIED BY SAID TRAILER AND ADAPTED TO MOVE SAID WING UNIT IN VERTICAL ADJUSTMENT.