Pipe joints or couplings – Packed – Flanged pipe
Reexamination Certificate
2008-07-01
2008-07-01
Bochna, David E (Department: 3679)
Pipe joints or couplings
Packed
Flanged pipe
C285S424000, C285S367000, C285S410000, C277S612000, C277S608000, C277S626000
Reexamination Certificate
active
07393020
ABSTRACT:
In a pipe connection, a first pipe has a first flange of sheet metal provided with a first wall connected circumferentially to the first pipe. A second pipe has an end section shaped as a second flange. A clamp engages across the first and second flanges and has conical sidewalls forcing the first and second flanges axially against one another when tightening the clamp. The first flange delimits together with the first pipe an annular chamber that is coaxial to the longitudinal pipe axis. The first flange has a second wall that is glidingly supported on a free end of the first pipe. A sheet metal sealing ring is positioned between the first and second flanges. It has an edge section that is bent back onto a remaining sealing ring section that has a corrugation projecting past the bent edge section in an untightened state of the clamp.
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Brochure No. 6, NORMA® Profilschellen Kegelflanschverbidnungen, Sep. 1987, p. 6, Left col., Upper Figure.
Hartig Günther
Williams Steve
Bochna David E
Kueffner Friedrich
NORMA Germany GmbH
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