Motor vehicles – Power – Electric
Patent
1992-02-03
1994-06-21
Hill, Mitchell J.
Motor vehicles
Power
Electric
180 79, 180 793, 180907, B62K 100
Patent
active
053221400
ABSTRACT:
A four-wheeled cart, for physically challenged individuals has a frame that is propelled and supported by two driven rear wheels. An operator's seat is mounted on the rear portion of the frame. A generally flat platform, a part of which is inclined upwardly and forwardly, supports the operator's feet. A steerable front wheel on a vertical spindle is mounted on each corner of the front portion of the frame. The front wheels are steered by a toothed wheel assembly clamped to each vertical spindle under the flat platform, a torque transmission gear drive interconnecting the two toothed wheel assemblies, and a drive mechanism for turning the torque transmission gear drive. The drive mechanism can be a manual handle bar or an electric motor controlled by a joy stick. With the joy stick control, the flat platform is completely clear and allows the cart to move the operator up to work areas such as tables. The manual handle bar takes minimal space above the flat platform. The clamped friction connection between the toothed wheel assemblies and the vertical spindles allows the spindles to turn in the toothed wheel assemblies to prevent damage when a steered wheel strikes an obstruction.
REFERENCES:
patent: 3061031 (1962-10-01), Packard
patent: 4633962 (1987-01-01), Cox et al.
patent: 4798255 (1989-01-01), Wu
patent: 4887685 (1989-12-01), Shepard et al.
patent: 4953645 (1990-09-01), Korber et al.
Amigo Mobility International, Inc.
Hill Mitchell J.
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