Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1980-03-04
1982-04-20
Croyle, Carlton R.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
417220, F16D 3102, F04B 4900
Patent
active
043252150
ABSTRACT:
A hydraulic apparatus for changing flow rate by displacing the flow rate changing member of a variable displacement hydraulic pump accommodated in a casing for eliminating any surplus and leaked oil and diminished kinetic energy loss comprises an actuator, a flow rate control valve, a resilient member accommodated in the casing to urge the flow rate changing member toward the direction where the flow rate of the hydraulic pump is increased, first and second sliding members slidably received in first and second cylinder chambers, respectively, provided in the casing to urge the flow rate changing member toward the direction where the flow rate of the hydraulic pump is decreased, a first fluid conduit having one end connected with an outward port of the hydraulic pump and the other end connected with a rear port of the actuator, a second fluid conduit having one end connected with a fore port of the actuator and the other end connected with an inlet port of the hydraulic pump through the flow rate control valve, a third fluid conduit having one end connected with the second fluid conduit and the other end connected with the first cylinder chamber, and a fourth fluid conduit having one end connected with the first fluid conduit and the other end connected with the second cylinder chamber.
REFERENCES:
patent: 2472477 (1949-06-01), Harrington et al.
patent: 2552604 (1951-05-01), Thoma
patent: 2936588 (1960-05-01), Gerpen
patent: 2938469 (1960-05-01), Lauck
patent: 3186170 (1965-06-01), Gauthier et al.
patent: 3429123 (1969-02-01), Burroughs
patent: 4077744 (1978-03-01), Pensa
patent: 4259039 (1981-03-01), Arnold
Croyle Carlton R.
Look Edward
Teijin Seiki Company Limited
Toyota Jidosha Kogyo Kabushiki Kaisha
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