Float and check valve for hydrotherapy unit air intake

Details Float and check valve for hydrotherapy unit air intake Float and check valve for hydrotherapy unit air intake

1977-05-31

1979-09-25

Trapp, Lawrence W.

Surgery

Truss

Perineal

137202, A61H 900

Patent

active

041687051

ABSTRACT:
A one-way flow check valve is placed over an air inlet conduit to a hydrotherapy unit to prevent back flows of air and water up through and out of the conduit when the hydrotherapy nozzle outlet is blocked. A body of the valve contains a vertically-movable float which normally rests upon a retainer ring in a downward, air suction position. The float is raised upwardly and against a valve seat upon reverse flow of air and water. The light weight, buoyant construction of the float, as a hollow plastic member with top and side walls, allows the valve to shut off reverse flows of water whether fast or slow moving and to respond also to fast reverse flows of air ahead of a rising column of water. A retainer ring with float abutment pins retains the float in the body removably for cleaning the valve surfaces.

REFERENCES:
patent: 701428 (1902-06-01), Walsh
patent: 2663178 (1953-12-01), Schwartz
patent: 3152604 (1964-10-01), Frye et al.
patent: 3286712 (1966-11-01), Roden
patent: 3367325 (1968-02-01), O'Keefe
patent: 3768498 (1973-10-01), Urban
patent: 3908647 (1975-09-01), Tauntou

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