Motor vehicles – Steering by driving – Independently operable drive motors
Patent
1985-10-07
1988-09-27
Love, John J.
Motor vehicles
Steering by driving
Independently operable drive motors
180907, 280242WC, 297180, 297DIG4, B62D 1104
Patent
active
047734949
ABSTRACT:
A hydraulically actuated, energy efficient wheelchair utilizes a pair of identical wheelchair drive units, with each unit having a constant speed battery powered electric motor driving a hydraulic pump and associated hydraulic motor. Hydraulic fluid flow between each pump and its hydraulic motor is controlled by the operator through the use of a solenoid actuated proportional control valve to determine the speed and direction of rotation of the hydraulic motor. One of these hydraulic motors is mechanically coupled to each wheelchair drive wheel. Means are provided to discharge excess pressurized fluid upstream of the hydraulic motor so as to minimize the backpressure on the pump and to thereby conserve driving energy and increase battery life. A method for hydraulically driving the wheelchair is also disclosed.
REFERENCES:
patent: 3738702 (1973-06-01), Jacobs
patent: 3814199 (1974-06-01), Jones
patent: 3964786 (1976-06-01), Mashuda
patent: 4098144 (1978-07-01), Besel et al.
patent: 4114737 (1978-09-01), Fukui
patent: 4199036 (1980-04-01), Wereb
patent: 4235297 (1980-11-01), Porta
patent: 4258706 (1981-03-01), Shank
patent: 4318197 (1982-03-01), Drozd
Love John J.
Watts Charles R.
LandOfFree
Hydraulically drive wheelchair does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulically drive wheelchair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulically drive wheelchair will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2393742