Valves and valve actuation – Tube compressors
Reexamination Certificate
2005-12-20
2005-12-20
Walczak, David J. (Department: 3751)
Valves and valve actuation
Tube compressors
Reexamination Certificate
active
06976664
ABSTRACT:
A gasketless, straight-through bore fluid flow pinch valve and flexible, removable tubing element for improved sanitary conditions in production facilities. The valve casing is joined by fittings that enable separation of the casing to remove and replace the flexible element, which includes all wetted surfaces. The fittings may be one or more hinges to permit partial separation of the valve casing, which permits the element to remain on-line while maintenance is performed on the valve. The flexible element is a silicone or PTFE-composite which is in an axially compressed state when locked into the valve by rigid, tolerance-fitted backup cups on the molded ends of the element, which increases the process life of the element.
REFERENCES:
patent: 3285563 (1966-11-01), Clarkson
patent: 3350053 (1967-10-01), Schmitz
patent: 4877053 (1989-10-01), Yusko et al.
patent: 4899783 (1990-02-01), Yusko et al.
patent: 5992818 (1999-11-01), Jones et al.
Elbich Robert J.
Welch Steven D.
Zetterstrand Erik
Le Huyen
Mitos Technologies, Inc.
Walczak David J.
Werner & Axenfeld, LLP
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