Fluid handling – With repair – tapping – assembly – or disassembly means – With provision of alternate wear parts
Patent
1979-11-15
1981-01-06
Nilson, Robert G.
Fluid handling
With repair, tapping, assembly, or disassembly means
With provision of alternate wear parts
1375155, 13753313, 13753315, 251368, F16K 1504
Patent
active
042430674
ABSTRACT:
A check valve which has top and bottom flanges and a valve body thereinbetween. The flanges have aligned holes therethrough which serve as an inlet (bottom flange) and an outlet (top flange) for fluid flowing through the valve. A spherical ball is contained within the valve body and rests on a ball seat surrounding the inlet. A top plate is positioned adjacent to the top flange and has an opening therethrough which diverges concentrically toward the outlet opening, and a ring shaped ball stop which receives the ball when it is forced away from the ball seat by the fluid is positioned between the top plate and the top of the ball. Also, the inlet may have a restricted portion so that a diverging portion of the inlet opens into the valve body.
REFERENCES:
patent: 1530827 (1925-03-01), Gunn
patent: 1764186 (1930-06-01), Teesdale
patent: 2018769 (1935-10-01), Tryon
patent: 2121241 (1938-06-01), Bach
patent: 2608412 (1952-08-01), Bletcher
patent: 3096825 (1963-07-01), Clark
patent: 3186428 (1965-06-01), Bender
patent: 3285270 (1966-11-01), Klinefelter
patent: 3620653 (1971-11-01), Gaylord
patent: 3724496 (1973-04-01), Secrist
patent: 3900230 (1975-08-01), Darling
patent: 4043356 (1977-08-01), Morris
Nilson Robert G.
Sterling Drug Inc.
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