Device capable of climbing on top of an obstruction

Details Device capable of climbing on top of an obstruction Device capable of climbing on top of an obstruction

1997-03-04

1998-04-21

Hafer, Robert A.

Amusement devices: toys

Rolling or tumbling

Including vehicle-carried control mechanism activated or...

446457, 280 53, A63H 1740, A63H 2900, A61G 502

Patent

active

057411697

ABSTRACT:
A climbing device includes a hollow housing, a rotary drive unit, and a direction changing gear set having a main drive gear coupled to the drive unit, a transmission gear meshing with the main drive gear, first and second direction changing gears, a driven gear driven rotatably by one of the first and second direction changing gears, and a bevel gear mounted coaxially on the driven gear. A rotary wheel set is driven rotatably by the transmission gear to result in movement of the housing on a ground surface. A shift unit is disposed in the housing and has the first and second direction changing gears mounted rotatably thereon. The shift unit extends through an aperture formed in a front wall of the housing and is retractable into the housing, upon bumping into an obstruction, to move the first and second direction changing gears from a first operating state, where the first direction changing gear meshes with the main drive gear and drives rotatably the driven gear, to a second operating state, where the second direction changing gear meshes with the transmission gear and drives rotatably the driven gear. A climbing unit includes a rack which extends through aligned openings in top and bottom walls of the housing and which meshes with the bevel gear.

REFERENCES:
patent: 2108434 (1938-02-01), Fujii
patent: 4198049 (1980-04-01), Kurita
patent: 4618155 (1986-10-01), Jayne
patent: 4676763 (1987-06-01), Saito et al.
patent: 5195762 (1993-03-01), Pressly
patent: 5653301 (1997-08-01), Andre

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