Pipe joint restraint

Details Pipe joint restraint Pipe joint restraint

2005-07-11

2009-02-03

Hewitt, James M (Department: 3679)

Pipe joints or couplings

Packed

Externally with clamp

C285S339000, C285S342000, C285S343000

Reexamination Certificate

active

07484775

ABSTRACT:
A pipe joint restraint (16) includes a pocket (74) having a fulcrum (92) a fixed distance from the centerline (26) of an annular retaining gland (22) and about which a gripping element (76) pivots to move a gripping edge (75) toward the centerline (26) so as to grip a pipe (14) engaged by the gripping element (76) in response to thrust forces on the pipe (14). The length of gripping edge (75) is selected for the material of pipe (14). Adjustable element (78) operatively connects to the gripping element (76) and fulcrum (92) to pivot with the gripping element (76). Adjustable element (78) and may be torqued to a common, predetermined torque whether the pipe (14) is metal or polymeric.

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“Sigma One Lok”, Promotional Literature, Sigma Corporation, Cream Ridge, NJ, date unknown.

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