Hydrostatic drain plug

Baths – closets – sinks – and spittoons – Strainer – stopper – plug or closure – Plugs

Patent

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Details

137 42, A47K 114

Patent

active

058193286

ABSTRACT:
A hydrostatic drain plug/outlet assembly comprises a hollow body (1) with an inlet port and an outlet port for connection to a fluid conduit. A slidable valve member (6) is movable between a locked open position and a locked closed position via an intermediate position at which the valve member (6) is urged into sealing engagement with a sealing member (3) by a spring (21) which supports a hydrostatic pressure of predetermined magnitude beyond which excess hydrostatic pressure is relieved by the valve member to prevent fluid overflow in a vessel. The valve member is moved between the locked open position and the locked closed position by rotation of valve member (6).

REFERENCES:
patent: 1467965 (1923-09-01), Watrous
patent: 1975865 (1934-10-01), Rabinovich
patent: 2337331 (1943-12-01), Kirschner
patent: 2590656 (1952-03-01), Schnebel
patent: 3542057 (1970-11-01), Staiano
patent: 4084609 (1978-04-01), Johnson
patent: 4143432 (1979-03-01), Deken
patent: 4276662 (1981-07-01), Young
patent: 4597112 (1986-07-01), Cuschera

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