Fluid handling – Processes – Carbonated beverage handling processes
Patent
1993-04-12
1994-04-12
Nilson, Robert G.
Fluid handling
Processes
Carbonated beverage handling processes
137514, 137846, F16K 1516
Patent
active
053017072
ABSTRACT:
The present invention provides an anti-whistling duckbill check valve for use in a fluid flow path for permitting relatively free flow of fluid in the path in a first direction from a first to a second end of the valve and for preventing fluid flow in the path in a second opposite direction. The check valve includes first and second lips extending in converging relationship to each other from a base portion of the valve. A vibration dampening rib is located on each of the lips wherein the ribs are configured to have a natural frequency substantially equal to the lips. The ribs vibrate out of phase with the lips such that the vibration of the lips is dampened.
REFERENCES:
patent: 3822720 (1974-07-01), Souza
patent: 3896849 (1975-07-01), Ervin
patent: 4341239 (1982-07-01), Atkinson
patent: 4612960 (1986-09-01), Edwards et al.
patent: 5010925 (1991-04-01), Atkinson et al.
Nilson Robert G.
Vernay Laboratories, Inc.
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