Dishwasher inlet air gap

Details Dishwasher inlet air gap Dishwasher inlet air gap

1979-06-08

1980-12-09

Michalsky, Gerald A.

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

134186, F16K 2400

Patent

active

042379199

ABSTRACT:
An antisiphon air gap arrangement is disclosed acting as a vacuum breaker for the water supply to a dishwasher, including a partitioned, bilevel standpipe extending upwardly from the dishwasher tub bottom. One section of the standpipe acts as a maximum flood level establishing overflow drain, while the other section extends to a level in the tub above the so-established flood level, and receives a fill tube from the inlet water supply valve. A domed cover mounted to the tub bottom extends over the partitioned standpipe to prevent escape of overspray from the dishwasher through the standpipe, while openings about the bottom enable fill water to pass into the tub. The fill tube passes through the other section of the partitioned standpipe opening with a clearance space, through which air from the exterior of the dishwasher is drawn whenever suction conditions in the house plumbing occur. The maximum flood level established by the level of the one standpipe section seals the domed cover openings so that only exterior air is drawn into the fill tube. The domed cover also prevents possibly contaminated overspray from the dishwasher interior from being drawn into the fill tube under suction conditions.

REFERENCES:
patent: 1502184 (1924-07-01), Gillies
patent: 3082779 (1963-03-01), Jacobs
patent: 3155106 (1964-11-01), Baron
patent: 3183923 (1965-05-01), Henrikson
patent: 3381700 (1968-05-01), Frymark
patent: 3411524 (1968-11-01), Raine et al.
patent: 3425438 (1969-02-01), Suffron
patent: 3512545 (1970-05-01), Weaver
patent: 3578016 (1971-05-01), Kushner
patent: 3709246 (1973-01-01), Kachergis
patent: 3929149 (1975-12-01), Phillips

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