Motor vehicles – Special wheel base – Having only three wheels
Patent
1985-03-27
1987-04-14
Mitchell, David M.
Motor vehicles
Special wheel base
Having only three wheels
180212, 180252, B62D 5700
Patent
active
046571043
ABSTRACT:
A concentric shaft mobile base for robots and the like is disclosed incorporating three wheels which can be simultaneously driven and steered so as to allow the mobile base to change direction without rotation of the mobile base. Concentric shafts transfer power from drive sources to the wheel assemblies and wheel axles. In an additional embodiment, each wheel is located on an extensible leg assembly which can be pivoted to project outwardly from the mobile base and thereby provide additional stability to the base. Concentric shafts are used in this embodiment to transfer steering and drive power to the wheel assemblies and wheels. Planetary gear assemblies are optionally associated with each extensible leg assembly so as to provide controlled retraction and extension of the leg assemblies without wheel slippage or pirouetting.
REFERENCES:
patent: 3336993 (1967-08-01), Carobbe
patent: 3822757 (1974-07-01), Spence
patent: 3858673 (1975-01-01), Browning
patent: 4221273 (1980-09-01), Finden
patent: 4463821 (1984-08-01), Falamak
patent: 4529052 (1985-07-01), Imai et al.
Cybermation, Inc.
Fressola Alfred A.
McGiehan Donn
Mitchell David M.
Stoltz Melvin I.
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