Flow blockage suction interrupt valve

Details Flow blockage suction interrupt valve Flow blockage suction interrupt valve

1999-01-22

2000-08-08

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Fluid opened valve requiring reset

137556, 137907, F16K 1704

Patent

active

060986549

ABSTRACT:
A flow blockage suction interrupt of the present invention reduces the dangerous possibility of bodily suction entrapment of a bather in a swimming, wading, or hydrotherapy pool. The safety valve operates to instantaneously introduce atmosphere into a suction piping system of a pool when a dangerous vacuum condition is detected. The incoming atmosphere breaks the vacuum, freeing entrapped bather. The safety valve includes a dynamic plug and dual spring-loaded actuators, one closing and one opening the valve to atmosphere. The closing actuator is dominant until the opening actuator is triggered by the dangerously high vacuum level that accompanies bodily suction entrapment. The preferred embodiment incorporates a spring-loaded telescopic actuator shaft that is spring-loaded to open fully once triggered, and is triggered by a factory-calibrated diaphragm-actuated suction sensor. Once this safety valve has been tripped, it must be manually reset by the pool operator.

REFERENCES:
patent: 3780759 (1973-12-01), Yahle
patent: 4949748 (1990-08-01), Chatrathi et al.
patent: 5351709 (1994-10-01), Vos
patent: 5351714 (1994-10-01), Barnowski
patent: 5682624 (1997-11-01), Ciochetti

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