# US 2019/0376601 A1 · Gaskets with a non-compressible core and one or more compressible layers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376601 A1 - Document ID: US20190376601A1 - Status: Published application - Kind: A1 - Application number: 16/433,795 - Filed: 2019-06-06 - Published: 2019-12-12 - Earliest claimed: 2018-06-08 - Assignees: Lydall Performance Materials (US), Inc. - Applicants: Lydall Performance Materials (US), Inc. - Inventors: Brian C. Lehr; Krishna Venkataswamy; Jeffery L. Barrall - Web page: https://patentgrep.com/patent/US20190376601A1 ## CPC - F16J 15/0818: {Flat gaskets} - F16J 15/122: {generally parallel to the surfaces} - F16J 15/127: {the reinforcement being a compression stopper} - F16J 2015/085: {without fold over} - F16J 2015/0856: {with a non-metallic coating or strip} - F16J 2015/0868: {Aspects not related to the edges of the gasket} - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS ## Abstract According to some embodiments, a multi-layer gasket with a non-compressible core, formed of any material that is relatively rigid and incompressible and can serve as a carrier for a gasket, and compressible layers, formed of any flowable or compressible sealing material with appropriate rheology for a particular sealing application, in the form of edge or surface coatings, is presented. ## Claims ### Claim 1 A gasket for forming a seal between a first mating surface and a second mating surface, comprising: a non-compressible substrate with a first surface, a second surface and a central opening having a surrounding edge; a first compressible layer applied to at least a portion of the first surface; a second compressible layer applied to at least a portion of the second surface; and an edge coating applied to the surrounding edge of the central opening. ### Claim 2 (depends on 1) The gasket of claim 1, wherein the non-compressible substrate is formed of at least one material selected from the group consisting of metals, thermoset plastic materials, and thermoset composite materials. ### Claim 3 (depends on 1) The gasket of claim 1, wherein at least one of the first compressible layer, the second compressible layer, and the edge coating is formed of at least one material selected from the group consisting of thermoset elastomers and thermoplastic elastomers. ### Claim 4 (depends on 1) The gasket of claim 1, wherein the edge coating extends above and below a plane of the non-compressible substrate to engage in a coating-to-surface abutting relationship with the first mating surface and the second mating surface. ### Claim 5 (depends on 1) The gasket of claim 1, wherein the first compressible layer comprises a first bead and the second compressible layer comprises a second bead. ### Claim 6 (depends on 5) The gasket of claim 5, further comprising an embossment on the non-compressible substrate, wherein at least one of the first bead and the second bead covers the embossment of the non-compressible substrate. ### Claim 7 A gasket for forming a seal between a first mating surface and a second mating surface, comprising: a non-compressible substrate with a first surface, a second surface, and a central opening; a first compressible layer configured to cover the entire first surface and to contact the first mating surface in a surface-to-surface abutting relationship; and a second compressible layer configured to cover the entire second surface and to contact the second mating surface in a surface-to-surface abutting relationship, wherein at least one of the first compressible layer and second compressible layer is conformed to fill at least one defect in at least one of the first mating surface and the second mating surface upon compression of the gasket. ### Claim 8 (depends on 7) The gasket of claim 7, wherein at least one of the first compressible layer and the second compressible layer is formed of at least one material selected from the group consisting of thermoset elastomers and thermoplastic elastomers. ### Claim 9 (depends on 7) The gasket of claim 7, wherein the non-compressible substrate is formed of at least one material selected from the group consisting of metals, thermoset plastic materials, and thermoset composite materials. ### Claim 10 (depends on 7) The gasket of claim 7, wherein at least one of the first compressible layer and the second compressible layer has a larger surface area than that of the non-compressible substrate. ### Claim 11 (depends on 7) The gasket of claim 7, wherein the non-compressible substrate is a non-compressible gridded core having ribs forming spaces therebetween. ### Claim 12 (depends on 11) The gasket of claim 11, wherein the ribs are configured in a grid arrangement. ### Claim 13 (depends on 11) The gasket of claim 11, wherein at least one of the first compressible layer and the second compressible layer at least partially fills at least some of the spaces of the non-compressible gridded core upon compression of the gasket. ### Claim 14 (depends on 11) The gasket of claim 11, wherein the ribs are of a varied height. ### Claim 15 (depends on 14) The gasket of claim 14, further comprising: at least one bolt hole defining a high-pressure location surrounding the bolt hole; and a gasket midpoint defined by a location other than the bolt hole area, wherein the ribs are of a greater height proximate the gasket midpoint and a lesser height proximate the bolt hole. ### Claim 16 A method of sealing a first mating surface and a second mating surface, the method comprising: providing a gasket having a non-compressible substrate, a first compressible layer conformed to sealingly engage with the first mating surface, and a second compressible layer conformed to sealingly engage with the second mating surface, wherein the non-compressible substrate is configured between the first compressible layer and the second compressible layer; positioning the gasket between the first mating surface and the second mating surface; compressing the gasket; conforming at least one of the first compressible layer and the second compressible layer to distribute compression forces evenly across the surface area of the gasket; and uniformly sealing the first compressible layer and the first mating surface and the second compressible layer and the second mating surface. ### Claim 17 (depends on 16) The method of claim 16, further comprising: filling at least one defect in at least one of the first mating surface and the second mating surface with at least one of the first compressible layer and the second compressible layer. ### Claim 18 (depends on 16) The method of claim 16, wherein the non-compressible substrate is a non-compressible gridded core having ribs forming spaces therebetween, and further comprising: partially filling at least some of the spaces with at least a portion of at least one of the first compressible layer and the second compressible layer. ### Claim 19 (depends on 16) The method of claim 16, wherein the non-compressible substrate is a non-compressible gridded core having ribs forming spaces therebetween, and further comprising: contacting the first compressible layer with the second compressible layer in the spaces between the ribs of the non-compressible gridded core. ### Claim 20 (depends on 16) The method of claim 16, wherein the non-compressible substrate includes an edge coating on a surrounding edge of a central opening that extends above and below the plane of the non-compressible substrate, and further comprising: creating a uniformly pressurized seal between the edge coating and the first mating surface and between the edge coating and the second mating surface.