Abstract: A metal laminate type cylinder head gasket of the invention is basically formed of first and second metal plates laminated together. The first metal plate includes a heat preventing portion for defining a first hole for a cylinder bore, a main sealing portion situated around the heat preventing portion, and a base portion. The heat preventing portion shuts off heat from the cylinder bore thereat, and the main sealing portion forms a solid portion for sealing around the first hole. The base portion extends from the main sealing portion to substantially cover the entire area of the engine. The second metal plate includes a second hole with a diameter greater than a diameter of the main sealing portion, and is situated adjacent to the base portion of the first metal plate. The second metal plate is not substantially affected by heat in the cylinder bore.

Abstract: A metal gasket for an internal combustion engine is formed of at least one metal plate for constituting the metal gasket. The metal plate includes a hole and a bead formed around the holes for sealing the same. A thermal sprayed layer is formed integrally on and/or under the bead to locally increase the surface pressure of the bead when the bead is compressed. Thus, the surface pressure of the bead can be adjusted individually as desired.

Abstract: A metal gasket of the invention is used for an internal combustion engine, and is basically formed of a metal plate for constituting the gasket. The metal plate includes a hole and a bead around the hole for sealing therearound. A first coating layer is formed on at least a part of an upper surface of the metal plate except an upper portion of the bead. Thus, when the gasket is used, reduction of a surface pressure formed on the bead is prevented while fluid flowing through the hole is prevented by the bead and the first coating layer. The metal plate may be combined with one or more metal plates to constitute a metal laminate gasket.

Abstract: A metal gasket of the invention is used for an internal combustion engine. The gasket is formed of at least one metal plate for constituting the metal gasket. The gasket includes at least one bolt hole, and a bead having a main portion extending toward the bolt hole and an end portion located near the bolt hole. The end portion extending from the main portion changes a direction to incline in a direction away from the bolt hole. Accordingly, the end portion can be easily compressed when a bolt passing through the bolt hole is tightened. The plate with the bead may be combined with other plates to form a metal laminate gasket.

Abstract: A metal gasket for an internal combustion engine is installed between two engine parts. The metal gasket is formed of at least one metal plate extending substantially throughout an entire area of the engine to be sealed. The metal plate includes at least one bolt hole, a fluid hole situated near the bolt hole, a sealing device for surrounding the fluid hole to seal therearound, and a support bead situated around the sealing device without surrounding the bolt hole. The support bead is deviated from the fluid hole to balance surface pressure around the fluid hole when the engine parts are tightened. In case the gasket is formed of a plurality of metal plates, the sealing device and the support bead are formed on the different plates.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine. The gasket includes a main portion formed of at least two outer metal plates extending substantially throughout an entire area of the engine, a device for defining a first hole corresponding to a hole of the engine, and a coating applied onto a part of the defining device and one of the outer surfaces of the metal plates. The defining device are attached to the outer metal plates and has a plurality of dents near the first hole to surround the same. The coating is filled in the dents to cover a substantial area of the outer surface. Therefore, the coating does not substantially flow to thereby improve sealing around the first hole.

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 first engaging portion extending into the first hole. The second plate is situated above and connected to the first plate. The second plate includes at least one second hole and at least one second engaging portion extending into the second hole. When the gasket is urged against the engine part, the vertically spaced first and second engaging portions deform and engage the engaging projection to thereby prevent the gasket from easily disengaging from the engaging projection.

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 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 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 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 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 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 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 protecting member of the invention is used for a gasket situated between two engine parts. The protecting member includes a spring member situated between the two engine parts and located around bolt. When the bolt is tightened, the spring member abuts against the engine parts and is compressed to provide predetermined pressure to the bolt through the engine parts. Thus, when an outward force applied to the bolt increase, an amount of the outward force exceeding the predetermined pressure, i.e. the tightening pressure, is only applied to the bolt to absorb a part of the outward force. When an inward force applied to the bolt decreases, the predetermined pressure of the spring member acts against the inward force applied to the bolt. Thus, the pressure changes to the gasket is reduced to prevent creep relaxation of sealing means of the gasket.