Fluid handling – With liquid valves or liquid trap seals – Liquid seal in liquid flow line; flow liquid forms seal
Patent
1993-06-15
1993-11-23
Rivell, John
Fluid handling
With liquid valves or liquid trap seals
Liquid seal in liquid flow line; flow liquid forms seal
137115, 137530, 251251, F16K 1310, F16K 5524
Patent
active
052635082
ABSTRACT:
A device for charging sever line traps automatically upon decrease in main line water pressure comprising a branch line having a piston valve member telescopically received over the end of an adjustable tubular member, the piston having a first seat for sealing engagement with the end of the tubular member under normal pressure conditions in the main line and a second seat for sealing engagement with the inlet end of the chamber in which the piston and tubular member are mounted when the pressure in the main line is shut off. The piston being unseated from both the end of the tubular member and the end of the chamber, thus permitting flow to the trap, when the main line water pressure is decreased. The piston includes a metering pin for metering the flow of water through the tubular member. Provision also is made for making running adjustments to the valve during its service life as required to compensate for changes in house line pressure.
REFERENCES:
patent: 1970744 (1934-08-01), Goss
patent: 2408006 (1946-09-01), Smith
patent: 2903233 (1959-09-01), Magor
patent: 2938530 (1960-05-01), Matter
patent: 3333597 (1967-08-01), Sullivan
patent: 3408040 (1968-10-01), Kraft
patent: 3422835 (1969-01-01), Watts
patent: 4000752 (1977-01-01), Miller et al.
patent: 4497337 (1985-02-01), Mosbrucker et al.
C. H. Perrott, Inc.
Farley Eugene D.
Rivell John
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