Check valve

Details Check valve Check valve

1985-12-31

1987-01-20

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

13754321, F16K 1704

Patent

active

046374302

ABSTRACT:
A poppet check valve comprising mating body forming sections which define a valve chamber having a cylindrical inner wall. A generally cylindrical inlet passage connects axially with the valve chamber and a shoulder at the juncture between the inlet passage and the chamber defines an annular valve seat. Positioned in the chamber and extending transversely thereof is a relatively thin disk-like valve element. The valve element has a generally circular imperforate central section of a diameter greater than the diameter of the inlet passage but less than the diameter of the valve chamber. A plurality of legs extend radially from the periphery of the central section into sliding engagement with the inner wall of the valve chamber. A circular seal element is joined to one side of the central section at a location inwardly of its outer periphery to extend axially toward the valve seat. The valve element is maintained under a bias toward the seat by a coil spring mounted in the valve chamber. Positioned between the spring and the valve element is a stop member including a plurality of radially spaced, axially extending force applying elements for engaging the central section of the valve element on the side opposite the seal element. The stop also includes guide surfaces extending radially outwardly of the force applying elements into sliding engagement with the wall of the valve chamber at a location axially spaced from the valve element.

REFERENCES:
patent: 656236 (1900-08-01), Wood
patent: 874652 (1907-12-01), Bailey
patent: 1349253 (1920-08-01), Astrom
patent: 1913664 (1933-06-01), Finger
patent: 2447729 (1948-08-01), Bertea
patent: 2481713 (1949-09-01), Bertea
patent: 2673062 (1954-03-01), Cornelius
patent: 2736338 (1956-02-01), Britton
patent: 2888035 (1959-05-01), Thomas
patent: 3002528 (1961-10-01), Leissner
patent: 3361154 (1968-01-01), Alexandre
patent: 3662950 (1972-05-01), McIntosh et al.
patent: 4049017 (1977-09-01), Jones

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