Abstract: A metal gasket of the invention is used as a cylinder head gasket or a manifold gasket. The gasket is formed of a metal plate for constituting a metal gasket, at least one fluid hole, a plurality of bolt holes, and a bead formed in the metal plate to completely surround the fluid hole for sealing the same. The bead includes a waving portion at a portion where high pressure is applied when the engine is operated, and a non-waving portion. The waving portion has a covering area greater than that at the non-waving portion. Therefore, the waving portion can support pressure without creep relaxation.

Abstract: A metal laminate gasket of the invention is engaged with an engaging projection of an engine part for immovably locating the gasket on the engine part. The gasket is basically formed of first and second metal plates laminating together. The first plate includes at least one first hole and at least one engaging portion extending into the first hole. The second plate is situated above the first plate, and includes at least one second hole larger than the diameter of the engaging projection and at least one restricting portion. When the gasket is urged against the engine part, the engaging portion deforms and engages the engaging projection, while the restricting portion restricts bending strength of the engaging portion. The gasket is not accidentally disengaged from the engaging projection.

Abstract: A manifold gasket of the invention is used for sealing around manifold holes of a manifold, wherein at least three manifold holes are arranged side by side. The gasket is formed of a first metal plate extending around the manifold holes to constitute a manifold gasket, and two spacers attached to two longitudinal end portions of the plate. The first metal plate includes first holes corresponding to the respective manifold holes, and beads situated around the respective first holes for sealing therearound. Each spacer includes a second hole greater than an outer shape of the bead to allow the bead to be situated inside the second hole. The thickness of the spacer is less than the height of the bead. Thus, the manifold gasket can be securely fixed to an engine part through the spacers without creep relaxation of the beads, while the bead not surrounded by the spacer absorbs deformation of the manifold by heat.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine formed of a cylinder head and a cylinder block. The gasket is basically formed of two metal plates laminated together. The gasket has a rectangular shape, and includes a plurality of cylinder bores arranged in a longitudinal direction of the gasket, and a plurality of bolt holes arranged to surround the cylinder bores. The gasket has two lateral side portions, each being defined between a lateral edge and a line linking centers of bolt holes located adjacent to the lateral edge. Edge support shims are installed between the plates at the lateral side portions to substantially completely support tightening pressure of the bolts applied to the lateral side portions. Thus, deformation of the cylinder head is prevented, and substantially equal tightening pressure can be formed around the entire cylinder bores.

Abstract: A metal gasket of the invention is used for an internal combustion engine having a plurality of cylinder bores therein. The gasket is formed of at least one metal plate. The metal plate includes a plurality of holes corresponding to the cylinder bores, and at least one intermediate portion between the holes adjacent to each other. A plurality of beads is formed around the respective holes. The width of the bead at the intermediate portion is narrower than that at the rest of the bead, and the height of the bead at the intermediate portion is higher than that at the rest of the bead. Thus, the bead at the intermediate portion provides a sufficient surface pressure to seal thereat.

Abstract: A metal laminate gasket of the invention is formed of first and second metal plates laminating together. The first plate includes at least one first hole for receiving therein an engaging projection of an engine part, and a plurality of first engaging portions and first non-engaging portions alternately arranged to each other to define the first hole. The first engaging portions have first curved inner edges for forming a first imaginary hole with a diameter smaller than a diameter of the engaging projection. The second plate includes at least one second hole corresponding to and located above the first hole, and a plurality of second engaging portions and second non-engaging portions alternately arranged to each other to define the second hole. The second engaging portions have second curved inner edges for forming a second imaginary hole with a diameter smaller than the diameter of the engaging projection.

Abstract: A metal laminate gasket of the invention is installed in an internal combustion engine having at least one hole to be sealed. The gasket is formed of a plurality of metal plates to form a metal laminate gasket, an auxiliary sealing device formed around a first hole of the gasket for sealing therearound, and an annular shim situated between the metal plates and located outside the auxiliary sealing device. The auxiliary sealing device is compressible, while the shim is non-compressible. When the gasket is tightened, surface pressure greater than that on the auxiliary sealing device is formed on the shim to thereby securely seal around the first hole without causing deformation of the hole of the engine due to high surface pressure around the hole.

Abstract: A metal laminate type cylinder head gasket is formed of at least two metal plates for constituting the gasket. The gasket includes a plurality of cylinder bores arranged in a longitudinal direction, a plurality of first holes situated in longitudinal end areas of the gasket, and at least one second hole situated in a longitudinal middle area of the gasket. The gasket also includes a plurality of first grommets situated in and around the first holes, and at least one second grommet situated in and around the second hole. The thickness of the second grommet is thinner than that of the first grommet. Thus, when the gasket is tightened, tightening pressure is concentrated in the longitudinal middle area to thereby reduce deformation of a cylinder head.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine formed of a cylinder head and a cylinder block. The gasket is basically formed of two metal plates laminated together. The gasket has a rectangular shape extending in a longitudinal direction, and two lateral side portions, each being defined between a lateral edge and a line linking centers of bolt holes located adjacent to the lateral edge. At least two edge support beads are integrally formed in at least one of the plates. The bead has a V shape opening toward the lateral edge. Thus, the lateral side portions are widely supported to thereby prevent deformation of the cylinder head and provide substantially equal tightening pressure around the entire cylinder bores.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine having at least one hole to be sealed. The gasket is basically formed of first and second metal plates extending substantially throughout an entire area of the engine. The first plate includes an annular recess formed at an upper side around a first hole to form a stepped portion. The second plate includes a curved portion to define a second hole to be located inside the first hole, and a flange extending from the curved portion in a direction away from the second hole. The flange has a thickness greater than the depth of the annular recess. When the gasket is assembled, the flange is located above the annular recess. The flange provides surface pressure around the hole of the engine greater than that outside the recess when the gasket is tightened. The surface pressure around the hole may be precisely adjusted.

Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine having at least one hole therein. The gasket comprises a first metal plate, and a second metal plate situated under the first metal plate. The first plate includes a first sealing device around a first hole to be sealed, and an embossed portion between the first sealing device and a base portion of the first plate. The second plate has a second hole larger than the first sealing device, and a second sealing device around the second hole. When the first and second plates are assembled, the second plate does not pile the first sealing device. The gasket is securely sealed by the combination of the first and second sealing devices and the embossed portion.

Abstract: A metal laminate gasket of the invention is installed for an internal combustion engine having at least one hole to be sealed. The gasket is basically formed of first, second and third metal plates laminating together and extending substantially throughout the entire area of the engine. The first plate includes a curved portion to define a first hole corresponding to the hole of the engine and a flange. The second plate is situated above the first plate and has a thickness greater than that of the first plate. The second plate includes a pre-bent inclined portion between a second base portion and an edge portion located under the flange. The third plate is situated between the first and second plates and has the thickness less than that of the first plate. A third hole of the third plate is greater than an outer diameter of the inclined portion.

Abstract: A metal gasket of the invention is used for an internal combustion engine formed of a cylinder head and a cylinder block. The gasket is basically formed of one metal plate, and includes a plurality of cylinder bores arranged in a longitudinal direction of the gasket, and a plurality of bolt holes arranged to surround the cylinder bores. Edge support beads are formed on the plate around the cylinder bores located at the lateral side portions to substantially completely support tightening pressure of the bolts applied to the lateral side portions. Thus, deformation of the cylinder head is prevented, and substantially equal tightening pressure can be formed around the entire cylinder bores.

Abstract: A steel laminate gasket comprises first, second and third plates. The first plate includes a base portion, a curved portion around a cylinder bore, and a flange extending away from the curved portion. The third plate includes a hole and an edge portion around the hole, which is located above the flange. The second plate is situated between the first and third plates away from the cylinder bore, and sealing layers are formed on both surfaces of the second plate to seal between the plates. A resilient seal ring is situated above the edge portion near the curved portion to resiliently seal around the cylinder bore when the gasket is tightened.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine formed of a cylinder head and a cylinder block. The gasket is basically formed of two metal plates laminated together. The gasket has a rectangular shape, and includes a plurality of cylinder bores arranged in a longitudinal direction of the gasket, and a plurality of bolt holes arranged to surround the cylinder bores. The gasket has two lateral side portions, each being defined between a lateral edge and a line linking centers of bolt holes located adjacent to the lateral edge. At least two edge support beads are integrally formed on at least one of the plates. The edge support beads are formed at the lateral side portions to substantially completely support tightening pressure of the bolts applied to the lateral side portions. Thus, deformation of the cylinder head is prevented, and substantially equal tightening pressure can be formed around the entire cylinder bores.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine having at least one hole to be sealed. The gasket is basically formed of first and second metal plates extending substantially throughout an entire area of the engine. The first plate includes an annular recess formed at an upper side around a first hole to form a stepped portion. The second plate includes a curved portion to define a second hole to be located inside the first hole, and a flange extending from the curved portion in a direction away from the second hole. The flange has a thickness greater than the depth of the annular recess. When the gasket is assembled, the flange is located above the annular recess. The flange provides surface pressure around the hole of the engine greater than that outside the recess when the gasket is tightened. The surface pressure around the hole may be precisely adjusted.

Abstract: A metal laminate gasket of the invention is installed in an internal combustion engine having at least one hole to be sealed. The gasket is basically formed of a first metal plate and a second metal plate situated over the first metal plate. The first and second metal plates respectively include first and second base portions extending substantially throughout an entire area of the engine, first and second curved portions to define first and second holes, and first and second flanges extending from the first and second curved portions. The second hole has a diameter greater than an outer diameter of the first flange so that the first flange is located inside the second curved portion when the first and second plates are assembled. The thickness of the first plate is greater than the thickness of the second plate and less than a double thickness of the second plate.

Abstract: A metal laminate gasket of the invention is installed in an internal combustion engine with a hole to be sealed. The gasket is basically formed of first, second and third metal plates laminated with each other, and a grommet to seal around the holes of the engine. The grommet includes an upper portion and a lower portion with different lateral length. A main sealing section defined by the upper and lower portions and the first and third plates is formed around the hole of the engine, while a resilient sealing section is formed outside the main sealing section. The resilient sealing section is defined by the upper portion of the grommet, a bead on the first plate, and the second and third plates. The surface pressures at the main and resilient sealing sections can be easily controlled.

Abstract: A metal laminate gasket of the invention is installed in an internal combustion engine having a hole near an outer profile. The hole has a width along the outer profile, and the width of the hole is greater than a distance between the hole and the outer profile. The gasket is formed of a plurality of metal plates to constitute a metal laminate gasket. Each metal plate includes a side edge extending at least along the outer profile of the engine, a gasket hole having a size substantially equal to that of the hole of the engine, and an elongated portion located between the side edge and the gasket hole. The metal plates are immovably fixed together at the elongated portions to prevent the elongated portions from deforming outwardly of the engine.

Abstract: A metal laminate gasket of the invention is formed of a first metal plate and a second metal plate situated under the first metal plate. The first metal plate includes first outer and inner bending lines surrounding a hole to be sealed. A first inclined wall is situated between the first outer and inner bending lines. The second metal plate includes second inner and outer bending lines surrounding the hole. A second inclined wall is situated between the second outer and inner bending lines. When the gasket is compressed, the first inner bending line is located on the second outer bending line so that substantially even surface pressure is formed by the inclined walls.