Cart with auxiliary wheels

Details Cart with auxiliary wheels Cart with auxiliary wheels

2007-02-27

2007-02-27

Ellis, Christopher P. (Department: 3618)

Land vehicles

Wheeled

Stable vehicles, handle-propelled

C280S033991, C280S651000, C280S033998, C280S079110

Reexamination Certificate

active

11265947

ABSTRACT:
A cart with auxiliary wheels has a body having a bottom and two ends, a handle, at least one front swiveling wheel, a set of rear swiveling wheels and a set of auxiliary wheels. The handle is formed on the body. The front swiveling wheels and the rear swiveling wheels are mounted rotatably and respectively on the bottom of the body. The swiveling wheels are omni-directional and allow the cart to be moved in all directions. The auxiliary wheels are mounted centrally between the front swiveling wheels and the rear swiveling wheels. The auxiliary wheels are non-swiveling and are mounted parallel with the front-rear direction of the cart to provide straight-line stability to the cart.

REFERENCES:
patent: 2688493 (1954-09-01), Rosenberg
patent: 2879072 (1959-03-01), Rear et al.
patent: 5050898 (1991-09-01), Petrell, Jr.
patent: 5556118 (1996-09-01), Kern et al.
patent: 6203029 (2001-03-01), Ondrasik
patent: 6331009 (2001-12-01), Wilkinson
patent: 6983946 (2006-01-01), Sullivan et al.
patent: 7014200 (2006-03-01), Calmeise et al.

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