Automatically shifting stair climber structure for a...

Details Automatically shifting stair climber structure for a... Automatically shifting stair climber structure for a...

B - Operations, Transporting

62

B

280/8, 280/84

B62B 1/12 (2006.01) B62B 5/02 (2006.01)

Patent

CA 2029274

A two-wheeled hand truck has a vertically inclined upright frame with a load supporting nose at its lower end. The frame is supported on a pair of wheels mounted on an axle by brackets which are pivotally connected to the frame for movement from a first load supporting position adjacent the frame to a rearward second position for supporting higher center of gravity loads. A stair climber structure is pivotal on the axle, and a link structure automatically shifts the position of the rear inclined linear surfaces of the stair climber structure to maintain them in a plane extending tangentially to the peripheries of the wheels when the brackets and wheels are moved.

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