Metal laminate gasket with a sealing groove

A metal laminate gasket for sealing between contact surfaces of two engine parts with holes, comprising,

• a first plate extending substantially throughout an entire area of the engine parts, said first plate having a first hole corresponding to the holes of the engine parts, a first groove formed around the first hole at one side of the first plate, and a second groove formed around the first hole at a side opposite to the first groove, each of said first and second grooves having an inlet portion and two inclined side walls extending inwardly from the inlet portion,
• a second plate situated above the first plate, said second plate having a second hole corresponding to the first hole and a first bead formed around the second hole, said first bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex, and
• a third plate situated under the first plate, said third plate having a third hole corresponding to the first hole and a second bead formed around the third hole, said second bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex of the second bead, said side portions of the first and second beads abutting against the side walls of the respective first and second grooves when the first, second and third plates are assembled, and said side portions of the first and second beads being pushed against the side walls of the respective first and second grooves to seal therebetween and surface pressures being formed at the base portions of the respective first and second beads around the first and second grooves to thereby securely seal around the holes of the engine parts when the first, second and third plates are tightened, distances from the hole of the engine to the first groove and the first bead being different from distances from the hole of the engine to the second groove and the second bead so that the first and second beads are arranged concentrically relative to the hole of the engine at a predetermined distance away from each other.

A metal laminate gasket for sealing between contact surfaces of two engine parts with holes, comprising,

• a first plate extending substantially throughout an entire area of the engine parts, said first plate having a first hole corresponding to the holes of the engine parts, a first groove formed around the first hole at one side of the first plate, and a second groove formed around the first hole at a side opposite to the first groove, each of said first and second grooves having an inlet portion, two inclined side walls extending inwardly from the inlet portion, and curved edges at corners thereof,
• a second plate situated above the first plate, said second plate having a second hole corresponding to the first hole and a first bead formed around the second hole, said first bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex, and
• a third plate situated under the first plate, said third plate having a third hole corresponding to the first hole and a second bead formed around the third hole, said second bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex of the second bead, said side portions of the first and second beads abutting against the side walls of the respective first and second grooves when the first, second and third plates are assembled, and said side portions of the first and second beads being pushed against the side walls of the respective first and second grooves to seal therebetween the surface pressures being formed at the base portions of the respective first and second beads around the first and second grooves to thereby securely seal around the holes of the engine parts when the first, second and third plates are tightened, said first and second beads being compressed smoothly at the corners of the first and second grooves.

A metal laminate gasket for sealing between contact surfaces of two engine parts with holes, comprising,

• a first plate extending substantially throughout an entire area of the engine parts ,said first plate having a first hole corresponding to the holes of the engine parts, a first groove formed around the first hole at one side of the first plate, and a second groove formed around the first hole at a side opposite to the first groove, each of said first and second grooves having an inlet portion and two inclined side walls extending inwardly from the inlet portion,
• a second plate situated above the first plate, said second plate having a second hole corresponding to the first hole and a first bead formed around the second hole, said first bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex,
• a third plate situated under the first plate, said third plate having a third hole corresponding to the first hole and a second bead formed around the third hole, said second bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex of the second bead, said side portions of the first and second beads abutting against the side walls of the respective first and second grooves when the first, second and third plates are assembled, and said side portions of the first and second beads being pushed against the side walls of the respective first and second grooves to seal therebetween and surface pressures being formed at the base portions of the respective first and second beads around the first and second grooves to thereby securely seal around the holes of the engine parts when the first, second and third plates are tightened, and
• an outer plate situated under the third plate, said outer plate including a curved portion to define the hole of the engine, and a flange extending away from the curved portion to be located above the second plate.

A metal laminate gasket for sealing between contact surfaces of two engine parts with holes, comprising,

• a first plate extending substantially throughout an entire area of the engine parts, said first plate having a first hole corresponding to the holes of the engine parts, a first groove formed around the first hole at one side of the first plate, and a second groove formed around the first hole at a side opposite to the first groove, each of said first and second grooves having an inlet portion and two inclined side walls extending inwardly from the inlet portion,
• a second plate situated above the first plate, said second plate having a second hole corresponding to the first hole and a first bead formed around the second hole, said first bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex, a distance between the base portions of the first bead being greater than a distance at the inlet portion of the first groove, and
• a third plate situated under the first plate, said third plate having a third hole corresponding to the first hole and a second bead formed around the third hole, said second bead extending toward the first plate and having an apex, two base portions and two side portions, each side portion being situated between the base portion and the apex of the second bead, a distance between the base portions of the second bead being greater than a distance at the inlet portion of the second groove, said side portions of the first and second beads abutting against the side walls of the respective first and second grooves when the first, second and third plates are assembled, and said side portions of the first and second beads being pushed against the side walls of the respective first and second grooves to seal therebetween and surface pressures being formed at the base portions of the respective first and second beads around the first and second grooves to thereby securely seal around the holes of the engine parts when the first, second and third plates are tightened.