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US 4,204,556 AGranted
Self-contained, automatic primer valve for sewer line drain traps
AssigneePrecision Plumbing Products, Inc.
InventorRichard N. Sullivan
Life of this patent
Estimating the term…
Abstract
A primer valve for sewer line drain traps comprises a case having an upper water inlet communicating with the pressurized house line and a lower water outlet communicating with the trap. The hollow interior of the case is divided into a lower valved dispensing chamber which dispenses water into the trap; an intermediate supply chamber which supplies water to the primer valve system, and an upper trapped-air chamber. The latter actuates the valve in the dispensing chamber and dispenses water to the trap each time the pressure in the house line drops.
Claims8
A sewer drain trap primer valve comprising:
- (a) an upright case having at its upper end a water inlet communicating with the house water line and at its lower end a water outlet communicating with the trap,
- (b) a ported partition dividing the case interior into an upper, valve-actuating, trapped air chamber and a lower chamber,
- (c) a diaphragm dividing the lower chamber into an upper, water-supplying chamber and a lower, water-dispensing chamber,
- (d) a valve seat on the water outlet arranged in valve-forming relation to the diaphragm,
- (e) a check valve in the partition port arranged to check the flow of water from the valve-actuating chamber to the water supply chamber,
- (f) a conduit interconnecting the water inlet and the water-supplying chamber, and
- (g) a passageway for water between the valve-actuating chamber and the water-dispensing chamber.
4 more elements
Dependencies are inferred from the claim text.