Pipe joints or couplings – Packed – Flanged pipe
Reexamination Certificate
2007-02-27
2010-06-29
Hewitt, James M (Department: 3679)
Pipe joints or couplings
Packed
Flanged pipe
C285S364000, C285S379000
Reexamination Certificate
active
07744133
ABSTRACT:
A clamping apparatus for allowing pre-close-out access to the head of a Stirling machine and facilitating subsequent close-out welding of the head. The head is axially separable into removable and fixed portions that engage each other. Each portion has an annular flange extending radially outwardly at its engaging end, and each flange has an annular groove. O-rings are seated in the grooves. A temporary sealing ring surrounds and engages the O-rings. Clamping rings seat against axially opposite sides of the abutting annular flanges. Fasteners draw the rings together, thereby drawing the fixed and removable portions of the head together and securing them against relative axial movement. For close-out of the machine, the clamping rings, temporary sealing ring, and O-rings are removed and the grooved annular flanges serve as weld reliefs for final hermetic close-out welding.
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Carroll Joseph P.
Wood James Gary
Foster Frank H.
Hewitt James M
Kremblas & Foster
Sunpower, Inc.
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