B - Operations – Transporting – 62 – B
Patent
B - Operations, Transporting
62
B
214/2
B62B 1/00 (2006.01) B62B 1/14 (2006.01) B62B 5/00 (2006.01) B66F 9/06 (2006.01)
Patent
CA 1060391
ABSTRACT OF THE DISCLOSURE A stacker attachment for use to extend the versatility of a battery powered two wheel hand truck which can lift loads from one level to another and, more importantly, operate as a walker for moving loads up and down the stairs; but which two wheel hand truck cannot operate as a stacker because its inner movable frame can never be raised above the wheels at the bottom of the stationary frame of the two wheel hand truck. The stacker has a long stationary frame but a short inner movable frame relative to the stationary frame. The stacker has an elongated screw shaft which freely rotates in a journal at the top of the long stationary frame, but which is operatively joined to a bearing nut fixed to the top wall of the inner movable frame, and is operatively engaged to the electric motor. The short inner frame has a long lifting path along the elongated stationary frame for lifting and stacking loads. The stacker is releasably but securely mounted to the two wheel hand truck, and the stacker has conductors and elongated battery leads which can be connected to the battery carried by the two wheel hand truck. Switch means on the stacker selec- tively rotate the stacker lead screw in one of two opposite rotational directions to lift the inner movable frame, and an attached lifting plate raises loads for stacking, and also lowers such inner movable frame to its starting position at the bottom of the stacker. -1-
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