Power plants – Pressure fluid source and motor – Methods of operation
Patent
1995-01-30
1996-07-30
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Methods of operation
60492, 91415, 91459, F16D 3900, F15B 1517
Patent
active
055400485
ABSTRACT:
A controller for changing the ratio of a continuously variable hydrostatic transmission, as determined by the angular position of a swashplate, including an actuator having a cylinder slidingly receiving a piston to define a pair of chambers. A pair of solenoid valves, each configured to connect a respective chamber selectively to sump pump pressure or atmospheric pressure, are energized with a stream of pulses to create differential fluid pressures in the chambers, thereby producing movement of the piston; the piston movement being linked to the swashplate to produce a corresponding adjustment of the swashplate angular position. The rate of change of the swashplate angular position is controlled by pulse width modulating the pulse stream.
REFERENCES:
patent: 1648000 (1927-11-01), Lee
patent: 2832198 (1958-04-01), Pichon
patent: 2946193 (1960-07-01), Chittenden
patent: 3175363 (1965-03-01), Molly
patent: 3204411 (1965-09-01), Stockton
patent: 3209911 (1965-09-01), Stockton
patent: 3291068 (1966-12-01), Wiggermann
patent: 3479924 (1969-11-01), Ferguson
patent: 3561212 (1971-02-01), Pinkerton et al.
patent: 3601981 (1971-08-01), Ifield
patent: 3602105 (1971-08-01), Slusher
patent: 3654761 (1972-04-01), Eickmann
patent: 3740954 (1973-06-01), Young
patent: 3886742 (1975-06-01), Johnson
patent: 4450753 (1984-05-01), Basrai et al.
patent: 4493189 (1985-01-01), Slater
patent: 4495768 (1985-01-01), Valavaara
patent: 4813339 (1989-03-01), Uno et al.
patent: 4901529 (1990-02-01), Iino
patent: 4932311 (1990-06-01), Mibu et al.
patent: 4951468 (1990-08-01), Sasajima et al.
patent: 5423183 (1995-06-01), Folsom
Kerr William R.
Larkin Robert F.
Cahill Robert A.
Krauss Geoffrey H.
Martin Marietta Corporation
Nguyen Hoang
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