Air-relief valves

Details Air-relief valves Air-relief valves

1978-05-22

1980-06-24

Cohan, Alan

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137411, 13763015, F16K 3120

Patent

active

042090326

ABSTRACT:
An air-relief valve is described comprising a housing having a large orifice at its upper end for releasing or admitting air when filling or emptying the water line to which it connected; a float formed with an axial bore; a first valve member having a head at its upper end disposed between the float and the large orifice, the first valve member further having a depending stem disposed in the axial bore of the float, and a small orifice communicating with the large orifice of the housing; a second valve member actuated by the float such that when the float rises it causes the second valve member to close the small orifice in the first valve member, the rising of the float also causing the first valve member to rise and to close the large orifice in the housing; and an abutment carried by the first valve member engageable by the float during the descent of the float to apply its weight to the first valve member tending to move same away from the large orifice.

REFERENCES:
patent: 2673618 (1954-03-01), Batchelder
patent: 3054419 (1962-09-01), Farrell
patent: 3179750 (1965-11-01), McCracken

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