Valve and dash-pot assembly

Details Valve and dash-pot assembly Valve and dash-pot assembly

1985-04-23

1986-07-22

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137808, 188311, 18832214, F16K 1503

Patent

active

046013091

ABSTRACT:
A dash-pot valve comprising a cylinder submerged in the fluid of a housing and having a piston attached to a plunger projecting into the path of closing movement of a pivotal valve member. A vortex chamber in said cylinder is provided with tangentially directed inlets to generate vortex flow upon retraction of said plunger and effect increasing resistance against said piston to progressively retard the closing rate of said valve member toward its seat.

REFERENCES:
patent: 396950 (1889-01-01), Nickeroson
patent: 949734 (1910-02-01), Rowbotham
patent: 3098502 (1963-07-01), Deve
patent: 3220517 (1965-11-01), Lorenz
patent: 3362508 (1968-01-01), Mayer
patent: 3441053 (1969-04-01), Robinson
patent: 3789872 (1974-02-01), Elliott
patent: 3942551 (1976-03-01), Schuller
patent: 4064977 (1977-12-01), Taylor
patent: 4112977 (1978-09-01), Syred
patent: 4190078 (1980-02-01), Bielefeldt
patent: 4330006 (1982-05-01), Eck
patent: 4335644 (1982-06-01), Goes
patent: 4407397 (1983-10-01), Fukushima

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