Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for a pipe – conduit – or cable
Patent
1997-10-09
1999-12-07
Browne, Lynne H.
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal for a pipe, conduit, or cable
277605, 277626, 522208, F16L 502
Patent
active
059970065
ABSTRACT:
A bidirectional gasket providing a water-tight seal between a manhole assembly and a pipe, having a T-shaped anchoring portion for embedment in a manhole opening. An A-shaped pipe engagement portion joined to the anchoring portion by a connecting web facilitates bending of the gasket. The A-shaped portion has "legs" and recesses forming water pockets preventing water from entering between gasket and pipe. The gasket durometer enhances the water tight seal of the legs with increasing water pressure. The pipe engaging portion accommodates a greater outside pipe diameter compared with conventional connectors due to reduced volume, by providing voids within the connector. The gasket accommodates diameter deflection or ovation in rigid and flexible pipe materials. The A-shaped profile provides greater angular deflection and/or pipe misalignment allowance compared with conventional connectors. Tapered projections near the apex wipe the pipe external periphery upon insertion and further contribute to compression of the connector in the nose portion, preventing the projection from flipping over during pipe insertion. The web joining the anchoring and pipe engagement portions has a tapered cross section, increasing in thickness toward the pipe engagement portion, enhancing compression of the web against the pipe. The connecting web and interior periphery of the T-shaped portion have integral projections which eliminate profile thinning and significantly reduce water infiltration. The simplified water pocket recesses ease installation problems and prevent pull-in of the water pocket which results in connector failure.
REFERENCES:
patent: Re34787 (1994-11-01), Westhoff et al.
patent: 3172237 (1965-03-01), Bradley
patent: 3323426 (1967-06-01), Hahn
patent: 3521528 (1970-07-01), Wangerow
patent: 4508355 (1985-04-01), Ditcher
patent: 5529312 (1996-06-01), Skinner et al.
patent: 5741015 (1998-04-01), Skinner
Kelly James A.
Westhoff James A.
Binda Greg
Browne Lynne H.
Poly-Tec Products, Inc.
Weinstein Louis
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