Motor vehicles – Power – Hoods
Patent
1975-11-07
1977-05-03
Peters, Jr., Joseph F.
Motor vehicles
Power
Hoods
418148, 418261, B60K 1710, F01C 100, F03C 300, F04C 100
Patent
active
040209172
ABSTRACT:
A vehicle has a primary drive pump in communication with driven pumps associated with each wheel for driving the vehicle as hydraulic fluid is ported to the wheel pumps through a by-pass valve. The pumps are similarly designed with each including a rotor co-axially mounted within a fixed stator defining an annular pump chamber when fluid entering an intake opening moves against gradually extending vanes provided on the rotor. The fluid exits through a discharge opening in the stator, and the vanes are designed to be fully retracted at a position between the openings and gradually extended so as to fully extend after moving beyond the intake opening. Also, the vanes gradually retract as they approach the discharge opening. Such a vane movement is effected by means of eccentric grooves provided on opposing side walls of the stator with which portions of the vanes cooperate, thereby avoiding the need for the vane tips constantly contacting a cam surface and being urged in such position by means of springs as in the prior art.
A supply duct interconnects the inlet openings of the driven pumps with the discharge opening of the drive pump, and a return duct interconnects the discharge openings of the driven pumps with the intake opening of the drive pump. The by-pass valve interconnects the supply and return ducts for controlling the acceleration of the vehicle, and a reversing valve device likewise interconnects these ducts for reversing fluid flow therein to effect a reverse rotary motion of the driven pump rotors. Moreover, plungers connected to a service brake pedal are disposed within the ducts for sliding movement into and out of the flow path thereof for preventing fluid flow so as to halt rotary motion of the driven pump rotors thereby effecting a braking operation.
REFERENCES:
patent: 900410 (1908-10-01), Minor
patent: 1100004 (1914-06-01), Williams
patent: 1320892 (1919-11-01), Munn
patent: 1366138 (1921-01-01), Traudt
patent: 2379938 (1945-07-01), Swanson
patent: 2655785 (1953-10-01), Vlachos et al.
patent: 2671403 (1954-03-01), Peters et al.
patent: 2791284 (1957-05-01), Jackson
patent: 3008531 (1961-11-01), Howard
patent: 3185241 (1965-05-01), Jackson
patent: 3280934 (1966-10-01), De Biasi
patent: 3680652 (1972-08-01), Greene
patent: 3702642 (1972-11-01), Greene
Peters Jr. Joseph F.
Smith Milton L.
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