F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 27/107 (2006.01) F16L 21/00 (2006.01) F16L 23/18 (2006.01) F16L 49/02 (2006.01) F16L 49/08 (2006.01) F16L 55/163 (2006.01)
Patent
CA 2716219
An expansion mechanism of the type that may be used with a seal for sealing a connection about the upper end of a concrete structure, such as providing as seal across a manhole frame, optionally one or more spacer rings, and the upper end of a manhole chimney or riser, or which may be used with a seal for internally sealing a connection between a pair of pipes. The expansion mechanism includes a pair of ring portions and a pair of expansion mechanisms that include pivotal connections to the ring portions such that the assembly may be moved or folded between a folded configuration, in which the assembly has a reduced profile to allow the assembly to be moved into place at the sealing site, and a deployed configuration, in which the assembly has a cylindrical shape and is expandable to compress the seal against a cylindrical surface.
Neuhaus Ronald W.
Worley Myron S.
Press-Seal Gasket Corporation
Sim & Mcburney
LandOfFree
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