Waterbed draining system including vacuum relief valve

Details Waterbed draining system including vacuum relief valve Waterbed draining system including vacuum relief valve

1991-04-29

1992-02-25

Grosz, Alexander

Beds

Bedclothing

And means to facilitate changing thereof

5658, 141 7, 141 65, 141114, A47C 2708

Patent

active

050900757

ABSTRACT:
A waterbed draining system utilizes a vacuum relief valve operatively associated with a waterbed mattress bladder, or alternatively with the drain hose or water pump, to automatically provide air flow into the bladder upon the vacuum pressure within the bladder exceeding a predetermined level. The vacuum relief valve automatically bleeds air back into the bladder as needed to effect more complete drainage than was heretofore possible with conventional systems and without any need for operator assistance.

REFERENCES:
patent: 3797538 (1974-03-01), Mollura
patent: 4073019 (1978-02-01), Fraser
patent: 4399576 (1983-08-01), Callaway
patent: 4611357 (1986-09-01), Chelin
patent: 4996760 (1991-03-01), Coleman
"Simple Siphon" an Ad in the Aug. 1985 issue of Waterbed Magazine.

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