Motor vehicles – Steam traction engines – Spring mounted on axle
Patent
1974-01-14
1976-10-26
Wood, Jr., M. H.
Motor vehicles
Steam traction engines
Spring mounted on axle
180 44M, 180 66R, 60465, 60493, B60K 1730
Patent
active
039877680
ABSTRACT:
An auxiliary hydrostatic drive system for a vehicle includes a pump, a reservoir, fluid motors connected to the normally non-driven steerable wheels of the vehicle, reciprocating piston-type wheel drive motors connected to the normally nondriven steerable wheels, fluid lines interconnecting the pump and reservoir with the inlet and outlet ports of the wheel motors, and a motor control valve movable to either side of a neutral fluid blocking position to forward and reverse drive positions. An additional valve interconnects the motor ports with the drive chambers of the motors whenever the motor control valve is in the neutral position so that during periods when the motors are not connected to the pump and are driven mechanically, they function as pumps to pressurize their drive chambers and hold their pistons off the drive cams.
REFERENCES:
patent: 3129781 (1964-04-01), Stein
patent: 3458005 (1969-07-01), Malm et al.
patent: 3473442 (1969-10-01), Farmer et al.
patent: 3506081 (1970-04-01), Rumsey
patent: 3511131 (1970-05-01), Kress
patent: 3640066 (1972-02-01), Marshall
patent: 3641765 (1972-02-01), Hancock
patent: 3672167 (1972-06-01), Griesenbrock
patent: 3811525 (1974-05-01), Stuart
Hunck Billie Gene
Kress James Henry
Deere & Company
Silverstrim John P.
Wood, Jr. M. H.
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