Water access preventer

Details Water access preventer Water access preventer

1988-10-07

1989-11-07

Michalsky, Gerald A.

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

137107, 137800, 251 90, 251 93, F16K 2400, F16K 3506

Patent

active

048785156

ABSTRACT:
A water access preventer for testable water backflow prevention assemblies wherein a means is provided to quickly, inconspicuously, and inexpensively prevent unauthorized access to potable water travelling within these assemblies throughout the differential pressure gradient of these assemblies, comprising, in part: a means for locking the valves which provide access to the potable water, and a means for preventing the shut-off of linepressure throughout the differential pressure gradient of the device.

REFERENCES:
patent: 1595186 (1926-08-01), Gray
patent: 2069849 (1937-02-01), Rich
patent: 2620816 (1952-12-01), Griswold
patent: 3070115 (1962-12-01), Jester
patent: 3090218 (1963-05-01), Birkness
patent: 3173439 (1965-03-01), Griswold et al.
patent: 3724487 (1973-04-01), Hunter
patent: 3918477 (1975-11-01), Grams
patent: 3929152 (1975-12-01), Graham

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