F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 5/02 (2006.01) F16J 15/10 (2006.01) F16L 5/10 (2006.01)
Patent
CA 2114925
A molded or extruded bidirectional gasket providing a watertight seal between an opening in a manhole assembly and a pipe extending into the opening, comprises a T-shaped anchoring portion for embedment in a manhole opening. An A-shaped pipe engagement portion is joined to the anchoring portion by a slender connecting web enabling stretching and bending of the gasket when a pipe is inserted. The connecting web divides the recess into a pair of pockets on opposite sides of the web. One of the pockets has an opening end which widens to receive water under pressure when the gasket bends to receive a pipe. The opening of one pocket is enlarged as the other pocket is sealed. The A-shaped portion has legs providing such recesses. The gasket apex has a recess to locate voids therein which, in addition to enhancing mechanical softness of the gasket, also provide the ability to alter gasket compression by introducing a liquid filler thereinto. Tapered projections near the apex wipe the external periphery of a pipe upon insertion and also contribute to the compression of the nose portion of the connector.
Kelly James A.
Westhoff James A.
A-Lok Products Incorporated
Borden Ladner Gervais Llp
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