Valves and valve actuation – With correlated flow path – Pipe coupling or union
Reexamination Certificate
2005-10-07
2009-10-20
Fristoe, Jr., John K (Department: 3753)
Valves and valve actuation
With correlated flow path
Pipe coupling or union
C251S153000, C251S315010, C251S368000, C285S368000, C285S412000
Reexamination Certificate
active
07604217
ABSTRACT:
An electrolysis-resistant coupling assembly for a valve within a fluid line. A line flange within the line includes a first mating surface and a fluid passageway therethrough. A valve flange downstream from the line flange includes a second mating surface. The valve flange has an aperture passing therethrough with first and second bores forming a lip. A valve coupler has an upstream end provided with a coupler flange having a third bore. A substantially non-compressible, non-metallic captive ring is interposed between the lip, and the flange and body of the valve coupler. Bolts and nuts assemble the valve flange to the line flange with a gasket therebetween, compressing the lip against the captive ring and the coupler flange. The valve is either sweat fitted or threadably attached to the downstream end of the valve coupler. Various configurations for the valve flange, the captive ring, and the valve coupler are disclosed.
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Fristoe, Jr. John K
Grundfos Pumps Corporation
Hoette Jay J.
Small Dean D.
The Small Patent Law Group
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