Patent ID: 6155362
Filing Date: 2000-12-05
Classification: B62B

Abstract:
A new and improved dolly system including a motorized rolling track formed along its backside to allow it to crawl up stairways with its load comprising, in combination:a dolly having two generally vertically extending side rails and an L-shaped support at its lower end thereof and a cross brace adjacent to its upper end and with a pair of rotatable wheels adjacent to the L-shaped member;two pair of rearwardly facing braces on the support rails, one pair adjacent the upper end thereof and one pair adjacent the lower end thereof;an upper rotatable support rod supported by the upper braces and a lower rotatable support rod supported by the lower braces with a plurality of parallel idler rollers therebetween rotatably supported by a central block, the axis of rotation for the idler rollers being parallel with the axis of the rods;drive cylinders mounted on the rods with an endless belt positioned over the cylinders for rotation therewith, the belt being movable in a path of travel rearwardly of the support rods;a drive motor and operation drive belts coupling the drive motor and the support rods to rotate the support rods and hence the belts upon activation of the motor;control means including an on/off switch and an up button to drive the motor in a first upwardly direction and a down button to drive the motor in a second downwardly direction; anda remote control mechanism to operate the control means.