Pipe joints or couplings – With fluid pressure seal – With separate – encased pipe-gripping means
Reexamination Certificate
2006-05-23
2006-05-23
Hewitt, James M. (Department: 3679)
Pipe joints or couplings
With fluid pressure seal
With separate, encased pipe-gripping means
C285S105000, C285S106000, C285S107000, C285S108000, C285S243000, C285S369000
Reexamination Certificate
active
07048309
ABSTRACT:
A coupling for attachment to the end portion of a pipe includes jaw members adapted to slide along an inner end taper in the coupling body so that linear movement of the jaw members toward the end of the inner end taper adjacent an end of the coupling body causes movement of the jaw members radially inwardly of the coupling body against the end portion of the pipe when received in the coupling body. The coupling may include a bell type gasket to function as a spring and the spring action of the gasket may be augmented by installing a springy crib ring around the gasket inside the coupling body.
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Hewitt James M.
Mallinckrodt Robert R.
Thorpe North & Western LLP
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