Flow control device

Details Flow control device Flow control device

1990-07-18

1991-09-24

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Self-opening exhaust valve held closed by inlet pressure

91446, 91448, 91452, F15B 1108

Patent

active

050504835

ABSTRACT:
A flow control device includes a control valve having a discharge line to be connected to a hydraulic motor, a supply line to be connected to a hydraulic pump, a first bleed-off control passage having a line connected to a tank, and a second bleed-off control passage having a line connected to the tank through a secondary control valve, a flow dividing valve provided in the supply line and having a first position for allowing a first desired flow of oil discharged from the hydraulic pump and a second position for allowing a second desired flow of the oil, and a selector valve operable for the secondary control valve and the flow dividing valve and having a first selection position for closing the secondary control valve and shifting the flow dividing valve to the first position and a second selection position for opening the secondary control valve and shifting the flow dividing valve to the second position.

REFERENCES:
patent: 3171331 (1965-03-01), Samuel
patent: 3911942 (1975-10-01), Becker
patent: 4078475 (1978-03-01), Fillion
patent: 4282898 (1981-08-01), Harmon et al.
patent: 4417502 (1983-11-01), Shore
patent: 4418794 (1983-12-01), Manco
patent: 4706549 (1987-11-01), Inogaki et al.
patent: 4800990 (1989-01-01), Blain

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