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US 2007/0182106 A1Published application
Lubeless pipe gasket and method of fabrication
OwnerJeffrey Biesenberger, Kevin Kishinventors
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OwnerJeffrey Biesenberger, Kevin Kishinventors
Estimating the term…
A thermoplastic pipe gasket fabricated of a thermoset material is provided having a first pipe engaging surface and an exterior surface, with the exterior surface having applied thereto a water-based, flexible, slip-coating. The slip-coating comprises polyurethane, a cross-linking agent, and a dispersion of a friction reducing compound. The friction reducing compound can be selected from a fluoropolymer, silicone, or graphite, either alone or in combinations thereof. Depending on the method of fabrication, the slip-coating can be sprayed onto the thermoset material after the thermoset material has been extruded, but before the extrudate's fabrication into a gasket. Alternatively, the slip-coating can be sprayed onto the gasket following its assembly. Still further, the slip-coating can be applied to the thermoset material by dipping the thermoset material into the water-based, flexible, slip-coating.
A thermoplastic pipe gasket, said gasket fabricated of a thermoset material, said gasket comprising a first pipe engaging surface and an exterior surface, said exterior surface having applied thereto a flexible, slip-coating, said slip-coating comprising a friction reducing compound.
A thermoplastic pipe gasket formed by the process comprising the steps of:
A thermoplastic pipe gasket formed by the process comprising the steps of:
The thermoplastic pipe gasket formed by the process comprising the steps of:
Dependencies are inferred from the claim text.