Universal self-venting drain valve

Details Universal self-venting drain valve Universal self-venting drain valve

1990-05-30

1990-12-11

Rivell, John

Fluid handling

Systems

System with plural openings, one a gas vent or access opening

13762518, F16K 2400

Patent

active

049762850

ABSTRACT:
A self-venting drain valve (10) is mounted on a wall (30) of a fluid container having a fluid hole (32) and a vent hole (34). The valve has a body (20) with a bore (38) therein. A first hole (44) and a second hole (46) extend into said bore coaxial with the fluid and vent holes respectively. A drain port (48) extends through the valve body opposite the first hole. An air vent opening (54) extends through the valve body, generally opposite, but slightly offset from the second hole. A rotatable spool (60) is mounted in the bore. The spool has a first ball portion (62) adjacent the fluid hole and a second ball portion (64) adjacent the vent hole. The first and second ball portions of the spool have fluid passages therethrough. In a first position, the fluid passages in the ball portions are disposed from the fluid and vent openings and the valve is closed. Movement of the spool to a second position, enables the fluid passage in the first ball portion of the spool to receive fluid, placing the container under slight negative pressure. Further movement of the spool to a third position, opens the fluid passage through the second ball portion of the spool and enables air to enter the container so it may readily drain.

REFERENCES:
patent: 208913 (1878-10-01), Malpass
patent: 688586 (1901-12-01), Brake
patent: 873172 (1907-12-01), Ritter
patent: 928813 (1909-07-01), Spikes
patent: 1306210 (1919-06-01), Zucker
patent: 1490150 (1924-04-01), Wagner
patent: 2054488 (1936-09-01), Sinks
patent: 2056042 (1936-09-01), Fausek et al.
patent: 2113046 (1938-04-01), Freemon
patent: 2878829 (1959-03-01), Folmsbee
patent: 4440193 (1984-04-01), Matheson
patent: 4602657 (1986-07-01), Anderson, Jr. et al.
patent: 4611627 (1986-09-01), Eidsvoog et al.
patent: 4708171 (1987-11-01), Cudaback
patent: 4724074 (1988-02-01), Schaupp
patent: 4753266 (1988-06-01), Matheson et al.
patent: 4846223 (1989-07-01), Humbert, Jr.
patent: 4855041 (1989-08-01), Church et al.
patent: 4922960 (1990-05-01), Oelschlaegel

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