Balanced solenoid valves

Details Balanced solenoid valves Balanced solenoid valves

1987-05-18

1989-01-10

Rivell, John

Valves and valve actuation

Electrically actuated valve

Balanced valve

251282, 251337, F16K 3102, F16K 3902

Patent

active

047968540

ABSTRACT:
A proportional-control solenoid-actuated fluid valve, capable of governing relatively large volumes and rates of flow swiftly and accurately with expenditure of relatively little electrical power, includes a movable valving member positioned by an armature having a substantially frictionless spring suspension, the armature being under influence of a special force-counterbalancer in the form of a bellows proportioned and disposed to exert upon it, automatically, neutralizing forces which are substantially equal and opposite to unavoidable pressure-induced imbalances afflicting the valving member. The same pressures which tend to unbalance the valve member are impressed upon opposite sides of the bellows, one through an enabling bleed port, and resulting forces developed by the bellows over a defined area are exerted upon the armature mechanically in a counterbalancing sense.

REFERENCES:
patent: 1153681 (1915-09-01), Fulton
patent: 1396501 (1921-11-01), Brooks
patent: 1772406 (1930-08-01), Whiton
patent: 3009678 (1961-11-01), Soderberg et al.
patent: 3214134 (1965-10-01), Noaks
patent: 3627257 (1971-12-01), Stampfli
patent: 3949964 (1976-04-01), Freeman
patent: 4493474 (1985-01-01), Ohyama
patent: 4569504 (1986-02-01), Doyle
patent: 4635683 (1987-01-01), Nielson

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