Valves and valve actuation – With correlated flow path – Tank
Patent
1978-07-03
1980-03-18
Cline, William R.
Valves and valve actuation
With correlated flow path
Tank
137351, 220375, B65D 4104
Patent
active
041935756
ABSTRACT:
A molded plastic drain valve particularly adapted for use with automobile radiators to discharge fluid from a header tank. A drain housing or body of metal is attached by brazing to the tank wall and has an internally threaded bore therethrough terminating in a smaller drain opening encircled by a valve seat formed thereabout. A plastic valve has an external threaded portion and an axially faced sealing portion which moves to engage the valve seat of the housing. The assembly includes a unique means to prevent separation of the valve and housing including a stem which extends from the valve through the drain opening in the housing. It has a head or end portion of slightly less diameter than the drain opening and a small channel or groove located at its back side. A resilient washer member of elastomeric material is supported in the groove and its diameter is significantly larger than the drain opening. Upon valve insertion, the resilient washer folds back along the intermediate portion of the stem which is of significantly less diameter than the drain opening. When removal of the valve is attempted, the resilient washer engages the end of the housing at one side and is axially restrained by the enlarged head of the stem on the other side.
REFERENCES:
patent: 2985180 (1961-05-01), Grayson
patent: 3181555 (1965-05-01), Jacobson
patent: 3223117 (1965-12-01), Curie et al.
patent: 3811650 (1974-05-01), Dehar
patent: 3910550 (1975-10-01), Nelson
patent: 3948481 (1976-04-01), Pollock
Cline William R.
General Motors Corporation
Phillips R. L.
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