Check valve

Details Check valve Check valve

1980-08-28

1982-07-20

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

1375123, 13751627, 137539, 13751629, 251358, F16K 1504

Patent

active

043400841

ABSTRACT:
A ball check valve having a body with a through passageway having an internally restrictive frustoconical seat is provided with a frustoconical metallic backup member having a different cone angle than the seat and a large diameter ball having a maximum diameter greater than the maximum diameter of the backup member, the backup member having a contoured large diameter axial end face for receipt of a portion of the ball such that a seal is provided between the seat and the ball and between the backup member and the seat and means urging the ball against the backup member large diameter axial end and the backup member against the seat.

REFERENCES:
patent: 1725297 (1929-08-01), Paterson
patent: 2262169 (1941-11-01), Crowley
patent: 2306012 (1942-12-01), Campbell
patent: 3134572 (1964-05-01), Glasgow
patent: 3324673 (1967-06-01), Lindahl et al.
patent: 3386470 (1968-06-01), Goda et al.
patent: 3447564 (1969-06-01), North et al.
patent: 4086936 (1978-05-01), Vork

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