Motor vehicles – Steering by driving – Independently operable drive motors
Patent
1987-03-23
1989-02-28
Mitchell, David M.
Motor vehicles
Steering by driving
Independently operable drive motors
180 191, 280 35, 280 4711, 280 7911, 446454, 901 1, B62D 5104, B62D 1102
Patent
active
048077127
ABSTRACT:
A self-propelled table for carrying and/or lifting/lowering objects for invalid people having a hollow plastic upper enclosure which is padded at the edges and upon the surface of which contains anti-slip recesses and a joystring assembly. The lower portion of this assemblage is attached to a vertically mounted, telescoping tubular assembly which may be either fixed or supplemented with a motor-power assembly with which to adjust the height-away-from-the-floor of the uppermost serving surface. The bottom of the tubular assembly is attached to the upper portion of a hollow plastic lower enclosure which contains wheels, motors, batteries, and electronic circuits to translate the electronic signals from the joystring into meaningful wheel motions. Pulling the free end of the joystring causes the invention to propell itself and it's load in the same direction that the joystring was pulled; thereby providing handicapped people with the ability to perform simple tasks unassisted.
REFERENCES:
patent: 2574897 (1951-11-01), Tantimonaco
patent: 3173512 (1964-06-01), Carpezzi
patent: 3731756 (1973-05-01), Hajec
patent: 3802524 (1974-04-01), Seidel
patent: 3812929 (1974-05-01), Farque
patent: 4483405 (1984-11-01), Noda et al.
patent: 4592562 (1986-06-01), Strautnieks et al.
patent: 4627511 (1986-12-01), Yajima
patent: 4657267 (1987-04-01), Jaumann et al.
Feix Donald C.
Freiburger Thomas M.
Mitchell David M.
Watts Charles R.
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