Valves and valve actuation – Electrically actuated valve – Having element dimensionally responsive to field
Reexamination Certificate
2006-06-13
2006-06-13
Look, Edward K. (Department: 3751)
Valves and valve actuation
Electrically actuated valve
Having element dimensionally responsive to field
C251S004000, C251S007000, C138S119000
Reexamination Certificate
active
07059580
ABSTRACT:
A pinch valve is described wherein the critical flow path is modified to form a space between two opposing metal disks that transition between an open and a closed state. The disks are characterized by a spring constant and act like a diaphragm. A closure force is applied externally to completely close the disks and truncate flow, while providing a substantially perfect seal. Removal of the external force enables the disks to spring open and initiate flow. The pinch valve advantageously eliminates valve bodies, dead space, moving parts and seals, such as elastomers, that are subject to wear and corrosion.
REFERENCES:
patent: 4515536 (1985-05-01), van Os
patent: 5088522 (1992-02-01), Rath et al.
patent: 5351932 (1994-10-01), von Herrmann
Fristoe Jr. John K.
Hetherington Michael
Look Edward K.
Ulman Morrison
Woodside IP Group
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