Gate valve with expandable and contractable closure member

Details Gate valve with expandable and contractable closure member Gate valve with expandable and contractable closure member

1975-06-26

1977-07-19

Schwadron, Martin P.

Pipes and tubular conduits

With closures and plugs

Laterally insertable

137242, 251187, 251204, F16K 318

Patent

active

040362604

ABSTRACT:
A valve comprising: a housing having an opening therethrough around which is provided a seat; a closure assembly for blocking flow through the opening and for sealing engagement with the seat; and an actuator assembly connected to the closure assembly for moving the closure assembly between a first position, out of the flow path of the opening, to a second position, in the flow path, and for expanding the closure assembly for sealing engagement with the seat.

REFERENCES:
patent: 337438 (1886-03-01), Royce
patent: 1085013 (1914-01-01), Bordo
patent: 1250041 (1917-12-01), Snyder
patent: 1311332 (1919-07-01), Edwards
patent: 2676780 (1954-04-01), Wheatley
patent: 2861770 (1958-11-01), Bredtschneider
patent: 3072378 (1963-01-01), Holderer
patent: 3182954 (1965-05-01), Borger

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