Motor vehicles – Steering by driving – Independently operable drive motors
Patent
1978-10-11
1981-06-09
Love, John J.
Motor vehicles
Steering by driving
Independently operable drive motors
74474, 74481, 74518, 74522, 180315, B60K 2602, G05G 704
Patent
active
042719186
ABSTRACT:
This specification discloses an off-road vehicle employing an improved hydrostatic drive system including engine driven variable displacement pumps having respective actuating members for varying displacement in two directions equivalent to forward and reverse directions, wheel motors at each wheel representing hydraulic actuating device operable by the fluid from the pump, hydraulic reservoir, serially interconnecting supply and return lines, and an improvement comprising one or more operator control members and a sensitivity control means for controlling the range of movement of the actuating member responsive to movement of the operating control member in a respective direction. Also disclosed is a preferred embodiment in which four wheel hydrostatic drive is employed with an option of converting the hydraulic fluid output that normally goes to one set of wheels such that all of the fluid goes to the other set of wheels for road speed operation. Also disclosed are the details of preferred structural embodiments.
REFERENCES:
patent: 3237478 (1966-03-01), Jewell
patent: 3316773 (1967-05-01), Findlay
patent: 3525266 (1970-08-01), Brooks et al.
patent: 3535951 (1970-10-01), Larson et al.
patent: 3537328 (1970-11-01), Allen
patent: 3541878 (1970-11-01), Haffner
patent: 3611827 (1971-10-01), Bottum
patent: 3666034 (1972-05-01), Stuller et al.
patent: 3792744 (1974-02-01), Gray
patent: 3876020 (1975-04-01), Barsby
patent: 4011768 (1977-03-01), Tessenske
Love John J.
McGiehan Donn
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