Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1993-08-31
1995-08-08
Ryznic, John E.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60450, 60452, F16D 3102
Patent
active
054388325
ABSTRACT:
A control device for an actuator adapted to control a discharge pressure of a variable discharge pump by means of a regulator and capable of ensuring sufficient flow control range of change-over valves with respect to a spool stroke even when the number of rotations of an engine for driving the variable discharge pump is reduced to decrease a discharge rate of fluid from the variable discharge pump. Elastic force of a spring of a valve constituting the regulator is adjusted by means of a cylinder associated with a throttle lever for controlling the engine. Also, a control valve is arranged so as to be associated with the throttle lever, so that a pressure on a downstream side of the variable discharge pump is increased to change over the valve.
REFERENCES:
patent: 4448021 (1984-05-01), Hawkins
patent: 4523892 (1985-06-01), Mitchell et al.
patent: 4600364 (1986-07-01), Nakatani et al.
patent: 4710106 (1987-12-01), Iwata et al.
patent: 4864994 (1989-09-01), Myers
patent: 4949541 (1990-08-01), de Vietro
patent: 5341311 (1994-08-01), Liebler
Hasegawa Yoshimi
Naito Hisato
Nishiumi Kenichi
Yonekubo Yoshitake
Kayaba Industry Co. Ltd.
Morrison Thomas R.
Pastel Christopher R.
Ryznic John E.
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