Drain plugs

Details Drain plugs Drain plugs

1978-12-04

1981-03-24

Goldberg, Gerald

Fluid handling

Systems

Head-establishing standpipe or expansion chamber

137577, E03B 900, F17D 113

Patent

active

042574544

ABSTRACT:
A drain plug of the standpipe type embodying an elongated tubular member for affording drainage when the liquid level in a compartment is at the top of the standpipe, and a resilient, annular valve member mounted on the lower end portion of the standpipe for sealingly engaging a valve seat in a drain opening for preventing flow of said liquid into said drain opening around said standpipe, the valve member having an upper and lower flanged construction that is effective to guard against leakage around and damage to the drain plug if the drain plug is improperly aligned or excessive closing pressures are applied thereto.

REFERENCES:
patent: 401579 (1889-04-01), Newell
patent: 740737 (1903-10-01), Blum
patent: 2016498 (1935-10-01), Hopewell
patent: 2027661 (1936-01-01), Woodward
patent: 2263963 (1941-11-01), Barry
patent: 2626405 (1953-01-01), Keith
patent: 3108607 (1963-10-01), Blakeslee
patent: 3934280 (1976-01-01), Tancredi
patent: 4077430 (1978-03-01), Brown

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