B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
280/1, 214/2
B66F 9/00 (2006.01) B62B 1/14 (2006.01) B62B 5/02 (2006.01)
Patent
CA 1069088
ABSTRACT OF THE DISCLOSURE An electrically powered, two wheeled hand truck having telescoping frame parts, the inner frame part being raised and lowered by electric power means in the form of a rotatable screw shaft which engages a bearing nut fixed to the inner movable frame part. Rotation of the screw in a particular direction either lowers or raise the inner frame part. A DC motor is carried by the hand truck and powered by a battery voltage source also carried by the hand truck. Electrical switching means select the direction of rotation of the screw shaft for lowering or raising the inner movable frame part. Rapid and accurately controlled raising and lowering allows moving a load carried on the movable frame part from a raised position to a lowered position and vice-versa. A braking means holds the screw shaft when the motor is turned off so that the load does not slip. Starting the motor overrides the braking means to either raise or lower the load.
194393
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