Patent
Stair climbing device
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The article was published on 1965-09-01. It has received 9 citations till now. The article focuses on the topics: Stair climbing.read more
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Power hand truck
TL;DR: In this article, a hand truck frame mounted an endless chain belt having a perpendicularly extending bulb-like member connected to the wheel axle, which was used to power the wheels of the hand truck.
Patent
Dolly system for transporting objects up and down stairs
TL;DR: In this paper, an electric dolly system for transporting an object up and down stairs with a base platform connected to a bottom end of support rails, a handle at the top end and a pair of wheels at the bottom end, a track belt wrapped around a first and second rotator component adapted to rotate around the rotator components like a conveyor belt using a motor.
Patent
Hand truck with detachable power unit
Otto M. Rodriguez,Juan A. Lopez +1 more
TL;DR: In this article, a hand truck has a movable load platform that can be driven upwards and downwards by driving means associated with a readily detachable power unit, which allows an operator to place the hand truck on the ground adjacent a delivery truck, to raise the movable weight platform so that it is level with the load bed of the delivery truck and then to lower the elevatable platform so the loaded hand truck can be pushed across the ground.
Patent
Stair climbing hand truck
TL;DR: In this article, a hand truck for climbing stairs includes a frame having handles proximate a first end and at least two wheels proximate another end, and a stair climbing mechanism is engaged with the frame proximate the second end.