Pipe joints or couplings – Packed – Flanged pipe
Reexamination Certificate
2011-08-02
2011-08-02
Dunwoody, Aaron (Department: 3679)
Pipe joints or couplings
Packed
Flanged pipe
C285S112000
Reexamination Certificate
active
07988207
ABSTRACT:
Mechanical pipe couplings for joining pipe elements in end to end relation have arcuate keys which engage circumferential grooves in the pipe elements and radially projecting stiffening ribs aligned with the keys. At the end of the keys on opposite sides are camming surfaces which are formed by a thinning of the key. The camming surfaces may be concave, convex, or angularly oriented surfaces and serve to guide the keys into grooves when the keys are not directly aligned with the grooves.
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Dole Douglas R.
Henry Vance W.
Ballard Spahr LLP
Dunwoody Aaron
Victaulic Company
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