Patent ID: 8991830
Filing Date: 2015-03-31
Classification: F16J,F16L

Abstract:
1. A gasket for forming a flexible watertight seal between two adjoining components of a coupling, the gasket comprising: (a) an annular sealing member defining a central opening and having a longitudinal axis extending circumferentially around said central opening, said sealing member having a core formed at least in part of a generally flexible elastomeric material; (b) a first portion of said sealing member being in direct engagement with a sealing surface of one of the adjoining components of the coupling; (c) a second portion of said sealing member being in direct engagement with a sealing surface of the other adjoining component of the coupling; (d) at least one of said first portion and said second portion of said sealing member comprising a homogeneous covering of material which extends continuously along said longitudinal axis substantially the circumference of said sealing member, and which is compatibly heat-fusible with at least one of the adjoining components of the coupling; (e) said compatibly heat-fusible material being of a different material composition than said core; and (f) said covering of material being devoid of interstices and maintaining watertight continuity throughout its length at all times when stretched circumferentially in the direction of said longitudinal axis.