Power assisted hand truck

Details Power assisted hand truck Power assisted hand truck

1986-05-30

1988-03-01

Mitchell, David M.

Material or article handling

Self-loading or unloading vehicles

With load-receiving portion, or significant section thereof,...

280 472, B60P 118

Patent

active

047282452

ABSTRACT:
An improved power assisted hand truck includes a lower frame and an upper, upwardly extending, tilting frame for supporting a load in generally upright and rearwardly tilting orientations. The upper frame is tilted forward by a first hydraulic actuator mounted between the lower and upper frame portions. To stabilize the hand truck while raising the load, a stabilizer, pivotally mounted to the frame, is driven by a second hydraulic actuator mounted between the frame and the stabilizer. The first and second actuators are powered by a hand pump. Pressurizing the retract port of the second actuator causes the stabilizer to move until it contacts the ground. Continued pressurization of the retract port causes the second hydraulic actuator to pull the upper frame towards its rearwardly tilting position. The extend port of the second actuator is then pressurized slightly to cause the stabilizer to pivot away from the ground. The load is lowered by pressurizing the extend port of the first actuator.

REFERENCES:
patent: 1539933 (1925-06-01), Britton
patent: 1827209 (1931-10-01), Robbins
patent: 2570256 (1951-10-01), Lyons
patent: 3363787 (1968-01-01), Macomber
patent: 3416682 (1968-12-01), Pezzuti
patent: 3805979 (1974-04-01), Stoltz
patent: 3907138 (1975-09-01), Rhodes
patent: 4091942 (1978-05-01), Shelton

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