Valve for controlling pressure and flow

Dispensing – With discharge assistant – With bypass or return to supply

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Details

138 43, 222504, 251126, B67D 534

Patent

active

054959632

ABSTRACT:
A variable restrictor valve for use in an intermittent dispensing system having a recirculation loop. The restrictor valve establishes a more linear relationship between the amount of adjustment made thereto and the resulting pressure drop over the restrictor valve in the recirculation loop. A first embodiment of the restrictor valve changes the length of the flow path created by a helical groove to thereby adjust the flow resistance through the valve. A second embodiment uses a valve member in the form of a perforated cylindrical tube which is adjustable to present a varying number of perforations as the inlet to the tube and thereby allow adjustment of the flow resistance. A third embodiment utilizes a helical spring as a valve member in which adjustable spacing between the coils of the spring provides adjustability of the flow rate through the spring.

REFERENCES:
patent: 1918959 (1933-07-01), Culp
patent: 2327025 (1943-08-01), Davis
patent: 2402729 (1946-06-01), Buchanan
patent: 2833311 (1958-05-01), Baldelli
patent: 3907249 (1975-09-01), Persson
patent: 4200207 (1980-04-01), Akers et al.
patent: 4724899 (1988-02-01), Frates et al.
patent: 4734188 (1988-03-01), Burdette, Jr. et al.
patent: 4850514 (1989-07-01), Scholl et al.

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