Patent ID: 6371491
Filing Date: 2002-04-16
Classification: F16L,Y10S

Abstract:
A pipe coupling for surrounding a pipe in sealed engagement therewith, said pipe coupling comprising a body having an annular configuration which defines an internal gasket seat for receiving an annular shaped elastomeric gasket configured and dimensioned for cooperative engagement with said internal gasket seat, said elastomeric gasket having an inner surface and an outer surface, said inner gasket surface defining in cross section a generally U-shaped channel having a substantially flat upper peripheral surface portion (28a) and inwardly and downwardly inclined inner lip portions (28b) extending therefrom, said outer gasket surface defining in cross section a generally flat upper peripheral surface portion (28c), generally downwardly and outwardly extending side wall portions (28d), and generally downwardly and inwardly extending outer lip portions (28e), a dry lubricating film comprising a lubricant in a film-forming polymer adhered only to said outer surface portions of said gasket, said inner surface portions of said gasket being devoid of said film-forming polymer.