Ball check valve

Details Ball check valve Ball check valve

1987-11-16

1988-11-01

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

13751627, 13753315, 251361, 251363, F16K 1504, F16K 2500

Patent

active

047812133

ABSTRACT:
A ball check valve assembly for chemical pumps. A fluid conduit terminates at a first surface in a port of circular cross section. Within the conduit, an O ring seat is aligned with the port; an elastomeric O ring is positioned in the seat. Spacer means, radially outward of the O ring seat, extends generally away from the port and has a dimension adjacent the O ring seat greater than the cross sectional diameter of the O ring when unstressed. O ring capture means spaced from the O ring seat limits travel of the O ring away from the port, and provides a central aperture for the valve ball, which has a diameter greater than that of the port. The O ring has an ID less than the diameter of the ball and an OD greater than the diameter of the aperture; the spacer means ID is at least about 1/2% greater than the OD of the O ring. During closing travel of the ball, the O ring is free to move transverse to the direction of such travel responsive to the ball, for impact on the O ring distributed relatively equally over the contacted surface.

REFERENCES:
patent: 2409220 (1946-10-01), Melichar et al.
patent: 2481460 (1949-09-01), Williams
patent: 2790460 (1957-04-01), Radd
patent: 3131718 (1964-05-01), Mingrone
patent: 3327635 (1967-06-01), Sachnik
patent: 3346008 (1967-10-01), Scaramucci
patent: 4197875 (1980-04-01), Schieferstein et al.
patent: 4408632 (1983-10-01), Kent

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