Automatic back water valve system

Details Automatic back water valve system Automatic back water valve system

1999-03-01

2000-10-17

Hepperle, Stephen M.

Fluid handling

Processes

Carbonated beverage handling processes

137362, 13750522, 13750526, G05D 1608

Patent

active

061315958

ABSTRACT:
A valve body is formed in two half sections which are secured together to define a water passage and to confine therebetween a thin gate valve blade for movement between a lower open position and an upper closed position. An actuator includes a flexible bellows sealed to the valve body above the passage and a top plate connected by a rod to the valve blade. The valve body and the bellows define an expandable fluid chamber connected by a bottom port or line to a drain line. The valve body is installed within a water supply line or a sewage drain line extending under a floor. In the event sewage water backs up within the drain line, air within the fluid chamber is compressed to expand the bellows upwardly for closing the valve. When the sewage water flows from the drain line, the air pressure reduces, and the bellows collapses and automatically returns the valve blade to its open position.

REFERENCES:
patent: 1685932 (1928-10-01), Andersson
patent: 1991081 (1935-02-01), Charpier
patent: 2431399 (1947-11-01), Hull
patent: 2904064 (1959-09-01), Davis
patent: 3115890 (1963-12-01), Greenbaum
patent: 3213764 (1965-10-01), Nelson et al.
patent: 3486731 (1969-12-01), Magnani
patent: 4187873 (1980-02-01), Mehoudar
patent: 4257447 (1981-03-01), Clarkson
patent: 4432388 (1984-02-01), Rest
patent: 4637425 (1987-01-01), Petersen
patent: 5538032 (1996-07-01), Cook
patent: 5875813 (1999-03-01), Cook

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