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US 5,490,681 AGranted
Three layer metal gasket with dual coating
AssigneeDana Corporation
InventorsThomas P. Plunkett, Michael J. Kestly
Life of this patent
Estimating the term…
Abstract
An improved multi-layer gasket comprises only three metal plates and incorporates a dual coating system with different coatings applied to specific layers of the gasket. Through the orientation of the layers, a high temperature coating is used to enhance a combustion gas seal while an elastomer seal coating enhances a fluid seal. Through the selection of base metal thicknesses and coating thicknesses, an increased thickness area can be achieved to obtain an optimum load balance between the combustion seal and the fluid seal.
Claims19
A cylinder head gasket of an internal combustion engine comprising:
- three metal plates forming layers of said gasket;
- at least one combustion seal and at least one fluid flow seal;
- a first metal plate with a first opening and a second opening spaced away from said first opening, said first metal plate forming a first portion of said combustion seal and a first portion of said fluid flow seal;
- a second metal plate with a base portion disposed above said first plate, a curved portion extending away from said base portion, and a flange extending away from said curved portion that is spaced away and generally parallel to said base portion to form a second portion of said combustion seal, an outer periphery of said first opening of said first plate disposed between said base portion and said flange, said second metal plate having an opening corresponding to and generally aligned with said second opening of said first metal plate to form a second portion of said fluid flow seal;
- and
- a third metal plate adapted to form a third portion of said fluid flow seal adjacent to said second plate, said third metal plate having an inwardly facing side in facing relation to said base portion of said second plate, but in a non-overlapping orientation with said flange of said second plate, said third metal plate having an opening corresponding to and generally aligned with said second opening of said first metal plate and said opening of said second metal plate and wherein a portion of said second plate is positioned between said first plate and said third plate.
3 more elements
A cylinder head gasket of an internal combustion engine comprising:
- three metal plates forming layers of said gasket;
- at least one combustion seal and at least one fluid flow seal;
- a first metal plate with a first opening and a second opening spaced away from said first opening, said first metal plate forming a first portion of said combustion seal and a first portion of said fluid flow seal, an elastomeric coating on an outwardly facing side of said first plate;
- a second metal plate with a base portion disposed above said first plate, a curved portion extending away from said base portion, and a flange extending away from said curved portion that is spaced away and generally parallel to said base portion to form a second portion of said combustion seal, an outer periphery of said first opening of said first plate disposed between said base portion and said flange, a high temperature coating on an outwardly facing side of said second plate for sealing around said first opening when said gasket is tightened to enhance said combustion seal, said second metal plate having an opening corresponding to and generally aligned with said second opening of said first metal plate to form a second portion of said fluid flow seal;
- and
- a third metal plate adapted to form a third portion of said fluid flow seal adjacent to said second plate, said third metal plate having an inwardly facing side in facing relation to said base portion of said second plate, but in a non-overlapping orientation with said flange of said second plate, said third metal plate having an opening corresponding to and generally aligned with said second opening of said first metal plate and said opening of said second metal plate, said third metal plate having an elastomeric coating on an outwardly facing side, said elastomeric coating of said third plate working in combination with said second elastomeric coating of said first plate to enhance said fluid flow seal, wherein said plates are oriented such that a total thickness of said gasket is greater at said combustion seal than at said fluid flow seal and wherein a portion of said second plate is positioned between said first plate and said third plate.
3 more elements
A cylinder head gasket of an internal combustion engine comprising:
- three metal plates forming layers of said gasket;
- at least one combustion seal and at least one fluid flow seal;
- a first metal plate with a first opening and a second opening spaced away from said first opening, said first metal plate forming a first portion of said combustion seal and a first portion of said fluid flow seal, a first elastomeric coating on an outwardly facing side of said first plate and a second elastomer coating on an inwardly facing side of said first plate, said first plate having a first bead adjacent said first opening and a second bead adjacent said second opening;
- a second metal plate with a base portion disposed above said first plate, a curved portion extending away from said base portion, and a flange extending away from said curved portion that is spaced away and generally parallel to said base portion to form a second portion of said combustion seal, an outer periphery of said first opening of said first plate and said second bead of said first plate disposed between said base portion and said flange, a high temperature coating on an outwardly facing side of said second plate for sealing around said first opening when said gasket is tightened to enhance said combustion seal, said second metal plate having an opening corresponding to and generally aligned with said second opening of said first metal plate to form a second portion of said fluid flow seal;
- and
- a third metal plate adapted to form a third portion of said fluid flow seal adjacent to said second plate, said third metal plate having an inwardly facing side in facing relation to said base portion of said second plate and in a non-overlapping orientation with said flange of said second plate, said third metal plate having an opening corresponding to and generally aligned with said second opening of said first metal plate and said opening of said second metal plate, a bead generally aligned with said second bead of said first plate, and an elastomeric coating on an outwardly facing side, said elastomeric coating of said third plate working in combination with said first and second elastomeric coatings of said first plate to enhance said fluid flow seal and wherein a portion of said second plate is positioned between said first plate and said third plate.
3 more elements
Dependencies are inferred from the claim text.