Swing check valve disc

Details Swing check valve disc Swing check valve disc

1987-06-09

1988-11-01

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1503

Patent

active

047812141

ABSTRACT:
A disc for a swing check valve where the body of the disc and the hinge pins are cast as one piece to facilitate the alignment of the hinge pins with the sealing face of the disc. The swing radius of the disc is at a minimum and a spring closure is provided.

REFERENCES:
patent: 2532067 (1950-11-01), La Bour
patent: 3509908 (1970-11-01), Latham et al.
patent: 3604453 (1971-09-01), Boitnott
patent: 3720228 (1973-04-01), Wheatley, Jr.
patent: 4605041 (1986-08-01), Teumer
Exhibit 1: Arrow Valve Co., Inc. (brochure); "Short Pattern Wafer Check, Fig. 8"; p. 22; Caney, Kans.; undated.
Exhibit 2: Eagle Valve Company, Inc. (brochure); "Eagle Check Valves, Series 12"; p. 4; Tulsa, Okla.; undated.

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