Gasket

摘要

Gaskets for sealing two mating surfaces are described. The gaskets have an outer portion including a core between two sealing layers and an inner portion made of a deformable material and located in an aperature in the outer portion. The thickness of the inner portion is greater than the thickness of the outer portion. The inner portion may include a chemical treatment agent that can provide chemical protection to the mating surfaces. Methods of producing the gaskets and methods of using the gaskets for sealing joints, including corroded joints, are also described.

主权项

1. A gasket for sealing two mating surfaces comprising:
a) an outer portion having an upper surface, a lower surface, and an innermost edge located between the upper and lower surfaces, wherein the outer portion comprises
(i) a core and(ii) two sealing layers, wherein the core is between and adjacent to the two sealing layers, wherein one or both of the core and the sealing layers define the innermost edge of the outer portion, and wherein the innermost edge defines a first aperture in the outer portion; b) an inner portion comprising:
(i) a deformable material;(ii) an innermost edge defining a second aperture; and(iii) an outermost region secured to the innermost edge of the outer portion wherein the outermost region of the inner portion is in continuous contact with the innermost edge of the outer portion proximate the upper surface of the outer portion and in continuous contact with the innermost edge of the outer portion proximate the lower surface of the outer portion, wherein the inner portion is located within the first aperture, wherein a thickness of the inner portion is greater than a thickness of the outer portion.