Sewer drain trap primer valve

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems

Patent

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Details

13724725, 137549, 137561A, F16L 5524

Patent

active

052878775

ABSTRACT:
A sewer drain trap primer valve includes a case defining a volume; a flexible diaphragm separating the volume into an upper, water chamber and a lower, sealed, air chamber; a conduit connecting the water chamber with an outlet orifice defined by a lower end of the case; a valve element moveable between a first position and a second position in response to differential of pressure between an inlet, defined by an upper end of the case, and the water chamber; and a check valve that permits flow of water in a direction from the inlet toward the water chamber and restricts flow of water in the opposite direction. The inlet orifice is located between the volume and a source of domestic water. The outlet orifice is located between the volume and a sewer drain trap. The conduit defines a valve seat and, in first position, the valve element engages the seat to restrict flow of water from the water chamber into the conduit. In second position, the valve element is spaced from engagement with the seat to permit flow of water.

REFERENCES:
patent: 1967644 (1934-07-01), Williams
patent: 2096287 (1937-10-01), McDougall
patent: 2233818 (1941-03-01), Matter
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patent: 3333597 (1967-08-01), Sullivan
patent: 3422835 (1969-01-01), Watts
patent: 3583004 (1971-06-01), Watts
patent: 3633627 (1972-01-01), Perrott
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patent: 4000752 (1977-01-01), Miller et al.
patent: 4204556 (1980-05-01), Sullivan
patent: 4391295 (1983-07-01), Stipe
patent: 4497337 (1985-02-01), Mosbrucker et al.
patent: 4574399 (1986-03-01), Sullivan
patent: 4644972 (1987-02-01), Perrott
patent: 4816155 (1989-03-01), Linderman et al.

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