F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/56
F16J 15/32 (2006.01) E03F 3/04 (2006.01) F16J 15/02 (2006.01) F16L 5/10 (2006.01)
Patent
CA 1269681
ABSTRACT OF THE DISCLOSURE A gasket system is disclosed for providing fluidtight joint between a manhole riser and a sewer pipe. The gasket is formed with a mounting portion which is generally cylindrical, and provides an anchoring pro- section extending radially from the outer side thereof. A sealing projection is joined to the mounting portion by a hinge section. The sealing protection is placed in compression when the gasket is formed into a circle, and becomes bistable. In one position of stability, the sealing projection is substantially aligned with the mounting portion, and in the other position of stability, the sealing projection is located generally within the mounting portion. The gasket is positioned around a core, with the sealing projection aligned with the mount ing portion, and is cast into an opening provided by the material of the manhole riser. In such position, the sealing projection is partially embedded within the material of the riser. Prior to installation of a sewer pipe, the sealing projection is manually released from the material of the riser and is pushed through to its other position of stability. When a sewer pipe is pressed through the gasket, the sealing projection pro- vides substantial compression with the outer surface of the sewer pipe and a good fluidtight joint.
541255
Deeb Fouad M.
Skinner James W.
Press-Seal Gasket Corporation
Ridout & Maybee Llp
LandOfFree
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