Metering valve

Details Metering valve Metering valve

1989-08-28

1992-03-24

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Pilot valve

91454, 91457, 91452, 251 63, 137491, 137495, F15B 1108

Patent

active

050977466

ABSTRACT:
A metering valve adapted to operate a seat on a side of an actuator port by means of a poppet section of a main poppet arranged in a valve casing to selectively communicate the actuator port to a tank passage. The main poppet is formed with a pressure chamber on a side thereof opposite to the poppet section. The pressure chamber has a pressure receiving area substantially equal to that of the seat. Also, the main poppet is formed with a through-hole constantly communicated to the actuator port and a pilot chamber to which pilot pressure for moving the main poppet in a direction of opening the seat is applied. Thus, the metering valve is capable of stably accomplishing its control irrespective of a variation of pressure on the side of the actuator port.

REFERENCES:
patent: 3304842 (1967-02-01), Shafer
patent: 3318326 (1967-05-01), Nevuus
patent: 3389796 (1968-06-01), Fiala
patent: 3533440 (1970-10-01), Berry
patent: 3771554 (1973-11-01), Hassal
patent: 4065010 (1977-12-01), Worback
patent: 4167262 (1979-09-01), Lemmon
patent: 4201052 (1980-06-01), Breeden et al.
patent: 4206688 (1980-06-01), Haak et al.
patent: 4353289 (1982-10-01), Lonnemo
patent: 4548231 (1985-10-01), Schwede
patent: 4860788 (1989-08-01), Asaoka
patent: 4936095 (1990-06-01), Ross et al.

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