Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1990-03-14
1990-11-13
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
137217, 1374546, 13762517, 1376254, E03C 110
Patent
active
049694839
ABSTRACT:
A hydraulic faucet intended to house a cartridge containing flux control members shaped as plane plates of hard material, and comprising a valve body and a removable cover, wherein some inlet passages for ambient air are provided for in register with the faucet cover, and a one-way valve with elastic lip is housed within the cover, between an outer region of the faucet, communicating through the inlet passages with the outside ambient, and an inner region of the faucet, communicating with the delivery outlet of the faucet. This one way valve with elastic lip is inserted in such sense that it remains sealingly closed when the pressure in the inner region of the faucet is not lower than the ambient air pressure which is present in the outer region of the faucet, and it automatically opens when the pressure in the inner region of the faucet decreases, even of a slight amount, under the ambient air pressure, so that no siphon back flow may arise.
REFERENCES:
patent: 3172426 (1965-03-01), Cole
patent: 4508136 (1985-04-01), Kah
patent: 4696322 (1987-09-01), Knapp et al.
patent: 4827538 (1989-05-01), Heimann et al.
patent: 4876006 (1989-10-01), Iqbal
Gevipi A.G.
Michalsky Gerald A.
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