Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1980-04-10
1981-09-08
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
137218, 137596, F16K 1518
Patent
active
042879051
ABSTRACT:
A pair of interlocked flap valves within a faucet, such as a hose bib, provides for a fluid flow from a pressurized source through a discharge outlet while preventing a back flow to the source due to a lower pressure at the source than exists downstream as would occur within a resilient garden hose filled with water, sealed off, and being heated by the sun. A first flap valve, comprising a check valve, automatically closes when the main line pressure drops substantially or completely ceases, or by backflow pressures. When the check valve closes, an interlock connection thereof to a second flap valve, comprising a relief valve, simultaneously opens said relief valve relative to a relief port for outward discharge of the fluid. A manual control knob provides for selective "on-off" operation of the check valve.
REFERENCES:
patent: 2037023 (1936-04-01), Holby
patent: 2162671 (1939-06-01), Groeniger
patent: 2233200 (1941-02-01), Dreyer
patent: 3202165 (1965-08-01), Yavicoli
patent: 3974848 (1976-08-01), Wheatley
Nilson Robert G.
Van Der Wall Robert J.
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