Vacuum-breaking valve for pressurized fluid lines

Details Vacuum-breaking valve for pressurized fluid lines Vacuum-breaking valve for pressurized fluid lines

1987-04-23

1987-12-15

Michalsky, Gerald A.

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

1374542, 137517, 137854, F16K 2404

Patent

active

047125748

ABSTRACT:
For use in pressurized fluid lines, an anti-siphon and back-flow prevention valve. A conduit is tapped into the line upstream of an outlet terminating in a ball-shaped housing. The housing receives check valve means arranged for insuring that fluid does not escape during normal operation of the line, but for admitting vacuum-breaking air in the event of line pressure loss.

REFERENCES:
patent: Re30849 (1982-01-01), Crist
patent: 1755993 (1930-04-01), Kelley et al.
patent: 2115499 (1938-04-01), Salvoni
patent: 2259984 (1941-10-01), Anderson
patent: 2405639 (1946-08-01), Boosey
patent: 2502211 (1950-03-01), Dyer
patent: 2686528 (1954-08-01), Snyder
patent: 2738798 (1956-03-01), Goodrie
patent: 2777464 (1957-01-01), Mosely
patent: 3145724 (1964-08-01), Pelzer
patent: 4022244 (1977-05-01), Oman
patent: 4508136 (1985-04-01), Kah, Jr.

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