Motor vehicles – Steering by driving – Independently operable drive motors
Patent
1978-08-23
1980-05-13
Silverstrim, John P.
Motor vehicles
Steering by driving
Independently operable drive motors
74471R, 180 77R, 180271, B62D 1102, B60R 2114
Patent
active
042024226
ABSTRACT:
A safety lock for an agricultural windrower and/or conditioner comprising a self-propelled machine having a pair of drive wheels respectively powered by individual hydraulic motors each powered by separate hydraulic pumps driven by a fuel powered motor, the pumps being variable for driving the motors at desired speeds and directions to comprise a hydrostatic steering system for said machine, said pumps being variable by a rotatable steering wheel, and a speed control level also is movable to cause actuation of both pumps equally and also actuates lock pins which secure the steering wheel in neutral position. The safety feature is effected by the speed control lever being biased into a latching notch when the steering wheel is moved to neutral position and thereby moves the lock pins automatically into locking position relative to holes in plates associated with linkage between the column of the steering wheel and said hydraulic pumps.
REFERENCES:
patent: 3528519 (1970-09-01), Case
patent: 3563109 (1971-02-01), Glass
patent: 3712403 (1973-01-01), Pakosh
patent: 3777833 (1973-12-01), Koch
patent: 3942602 (1976-03-01), Case
Just C. Hercus
Mitchell John B.
Seemar Frank A.
Silverstrim John P.
Sperry Rand Corporation
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