Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Reexamination Certificate
2006-08-01
2006-08-01
Look, Edward K. (Department: 3751)
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
C251S281000, C277S530000
Reexamination Certificate
active
07083160
ABSTRACT:
A balance-plug cage style control valve has substantially reduced body-bonnet bolt loading with an elastic seal. The elastic seal assembly includes an annular seal having an elastic region, a compression surface, and at least one sealing surface positioned in a channel within a valve cage mounted inside the valve body. At least one shoulder on the valve bonnet engages the elastic seal to deform the elastic region to place the sealing surface of the seal in contact with at least one of the valve bonnet or the valve cage to form a fluid seal.
REFERENCES:
patent: 2634943 (1953-04-01), Gulick
patent: 2898000 (1959-08-01), Hanny
patent: 3690682 (1972-09-01), Ferrill
patent: 3834666 (1974-09-01), Keith
patent: 3892384 (1975-07-01), Myers
patent: 4202556 (1980-05-01), Makishima et al.
patent: 4249574 (1981-02-01), Schnall et al.
patent: 4469123 (1984-09-01), Merrill
International Search Report issued in PCT/US2004/014864 mailed on Oct. 6, 2004.
Written Opinion issued in PCT/US2004/014864 application mailed Oct. 6, 2004.
Fisher Controls International LLC
Fristoe Jr. John K.
Look Edward K.
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