Valves and valve actuation – Valve – Seats
Reexamination Certificate
2011-06-07
2011-06-07
Fristoe, Jr., John K (Department: 3753)
Valves and valve actuation
Valve
Seats
C251S360000, C251S333000, C251S334000, C251S359000
Reexamination Certificate
active
07954788
ABSTRACT:
Methods and apparatus to align a seat ring in a valve are described. An example fluid valve includes a valve body having a curved internal surface to receive a seat ring and a seat ring having a sealing surface to receive a movable control member and a curved surface opposite the sealing surface to engage the curved internal surface of the valve body.
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Davies, Jr. Lonnie Oscar
Westwater David J.
Fisher Controls International LLC
Fristoe, Jr. John K
Hanley Flight & Zimmerman LLC
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