Abstract: A metal gasket is formed of first, second and third metal plates laminated together. The first metal plate has a first hole, and the second metal plate is situated above the first metal plate and has a second hole. The second hole is greater than the first hole and has a second edge located above the first metal plate. A first bead is formed in at least one of the first and second metal plates to surround the first and second holes. The third metal plate includes a base portion situated above the second metal plate, a curved portion extending from the base portion and situated inside the first and second holes, and a flange extending from the curved portion and situated under the first metal plate. The flange has a third edge located between the first and second edges, so that high surface pressure areas are formed above the flange and the first bead with a low surface pressure area therebetween, by which the gasket can be securely sealed.

Abstract: A cylinder head gasket has at least one combustion opening, a central metallic core and an expanded graphite facing layer on each side of the core. A stress rising bead is disposed on at least one of the graphite layers encircling each combustion opening for sealing around the combustion openings.

Abstract: This metal gasket comprises a pair of beaded metal plates formed of elastic metal plates having beads extending along the circumferences of bore holes, and adapted to seal bore seal portions, and one outer circumferential metal plate formed of an elastic metal plate adapted to seal outer circumferential seal portions other than the bore seal portions. The beaded metal plates and outer circumferential metal plate have different sealing performance, and are adapted to seal the bore seal portions and outer circumferential seal portions respectively, these two types of metal plates being formed out of different materials, whereby the gasket manufacturing cost is reduced. A pair of beaded metal plates are provided with beads extending along the circumferences of the bore holes with the projecting portions thereof opposed to each other.

Abstract: A seal structure and capable of reducing a width of a seal portion as much as possible while preventing the seal portion from being broken away. The seal structure for sealing between two members in a fluid-tight or air-tight manner is structured such that the seal portion is formed in at least one of joint surfaces of the two members by continuously printing along a seal portion of the joint portions and that a recess portion or a groove is formed at a middle portion of the seal portion in a widthwise direction.

Abstract: A metallic base gasket coated with elastic membrane having an outer sealing portion for sealing an outer circumference of a refrigerant compressor and an inner sealing portion for sealing boundaries between high and low pressure regions within the compressor, the outer and inner sealing portions being formed in an elastically deformable ridge, and at least one section of the ridge of the inner sealing portion being trifurcatedly connected to a portion of the ridge of the outer sealing portion to have a geometrical arrangement in which apex lines of the connected three ridges are equiangularly spaced apart from one another with respect to the center of the trifurcated connection of the ridges. The gasket may have an extended flat or curved face portion at the trifurcatedly connected ridges to permit the apexes of the connected ridges lie in the extended flat or curved face portion.

Abstract: This metal gasket is adapted to excellently seal a height different portion occurring on the opposed surfaces of a cylinder block and a chain case, by elastic members provided in recessed portions of full beads on an elastic metal plate. In this metal gasket, a first elastic metal plate is laminated on a second elastic metal plate so that the ridges of full beads on the first elastic metal plate contacts the second elastic metal plate. The first elastic metal plate is provided with a half bead extending along the circumference of an opening in which a camshaft driving chain travels, and full beads position in the regions which correspond to the opposed surfaces of a three-surface combining portion.

Abstract: Cylinder head gasket with a gasket plate having several sheet-metal layers and at least one combustion chamber aperture, wherein a first outer sheet-metal layer is provided with an annular bead which surrounds the combustion chamber aperture, projects in the direction towards an adjacent, second sheet-metal layer and abuts against the latter, and wherein to limit the deformation of the bead a metal spacer ring is attached by welding to one of the two layers radially adjacent to the bead, the spacer ring facing the other layer and surrounding the combustion chamber aperture; in order to make a simple optical examination of the quality of the welding join possible, the spacer ring is attached in a gas-tight manner to the layer supporting it by a continuous, annular laser welding seam closed upon itself and uniform except for an area of overlap, wherein the seam is doubled in the area of overlap.

Abstract: A sealing system is formed of gasket attaching portions facing each other, and a metal gasket. Each gasket attaching portion has a hole to be sealed and a flat surface portion around the hole. When the gasket attaching portions are assembled, the holes and flat surface portions face each other. At least one of the gasket attaching portions has a depression around the hole. The metal gasket includes a main portion situated between the flat surface portions of the gasket attaching portions, and an enlarged hollow portion attached to the main portion and facing the depression. When the gasket is tightened between the gasket attaching portions, the enlarged hollow portion is disposed in the depression and compressed thereat to securely and resiliently seal around the holes of the gasket attaching portions.

Abstract: A metal gasket in which a thin metal plate for reinforcing the beads of an elastic metal plate is laminated on bead regions only of the elastic metal plate, whereby a stable sealing performance is secured for a long period of time. This metal gasket comprises a thin metal plate provided with beads extending around the circumferences of parallel arranged combustion chamber holes, and an elastic metal plate having combustion chamber holes and extending with a predetermined width and laminated on the portions of the thin metal plate which are around the combustion chamber holes so as to be opposed to valley portions of the beads. The thickness of the thin metal plate is set smaller than that of the elastic metal plate.

Abstract: A metal gasket assembly includes first and second gasket layers each having at least one sealing port defined therein. Each sealing port has an embossed bead formed about the periphery thereof which extends from a planar surface of the gasket layer. A stopper layer is disposed between the respective planar surfaces of the gasket layers and it has at least one bore extending therethrough which circumscribes the embossed beads. The stopper layer is of a sufficient thickness to prevent over-compression of the embossed beads during installation of the gasket assembly. A method is also disclosed for constructing a gasket assembly in accordance with a preferred embodiment of the subject invention.

Abstract: A metal gasket for an internal combustion engine is formed of a metal plate having a first side and a second side opposite to the first side, and at least one first hole corresponding to a cylinder bore. The first hole is located closer to the first side than to the second side to thereby form a first area at the first side and a second area greater than the first area at the second side. A first bead is formed in the metal plate to extend along an entire outer periphery of the metal plate. The first bead has a first portion located at the first side and a second portion located at the second side. The first portion has a spring constant greater than that at the second portion to thereby provide a tightening pressure on the metal plate as equal as possible. When sealing devices are formed around the fluid holes, the sealing devices can be equally compressed to securely seal therearound.

Abstract: An edge of a cylinder bore hole of a base plate is folded back on the base plate to form a double-layer folded portion, and a soft member is held in the inside of the folded portion. Folded portions are also formed by folding an outer peripheral edge of the base plate at positions along a straight line which passes through center points of bolt holes which are located at each side of a reference line passing through center points of cylinder bore holes. The straight line is parallel with the reference line. Further folded portions are formed by folding the outer peripheral edge of the base plate at positions along a further straight line which passes through center points of bolt holes which are located at both sides of the reference line so that the further straight line is orthogonal to the the reference line. Rubber beads made of silicon rubber are formed on both joining surfaces of the base plate to bound each of the cylinder bore holes and the bolt holes.

Abstract: A seal of an elastomeric material used to mount an intake manifold in a gas-tight manner on the cylinder head of an internal combustion engine is disclosed. The seal is formed to blend together in one piece and is located in position on the side of the intake-manifold flange facing the cylinder head. The seal has sealing surfaces, which sealingly surround the periphery of the intake pipes of the intake manifold during normal operational use. The sealing surfaces are interconnected by web segments, and at least one of the web segments is designed in one area of its extent to act as a linear tolerance compensation segment, to be flexurally soft and/or capable of folding together.

Abstract: To improve a sealing function in a seal structure for sealing a passage formed between two members, seal portions 3 seals a passage 9 formed between a valve body 8 and a plate body 2 of a separate plate 1. The seal portions 3 is formed to have a constant width on the plate body 2 of the separate plate 1 corresponding to a shape of an end face portions 8a of the valve body 8.

Abstract: A gasket assembly for interposition between a pair of axially spaced-apart interface surfaces of an internal combustion engine. The assembly includes a metal retainer member having generally planar first and second surfaces with one or more apertures formed therethrough. Each of the apertures are configured for generally coaxially registration with a corresponding fluid passageway formed through the interface surfaces of the engine as having a periphery defining a margin of an extent greater than the inner diameter of the corresponding fluid passageway. One or more generally annular seal members are each received within a corresponding one of the apertures as including a first and second radial surfaces.

Abstract: A gasket having a bore (2), a base plate (1) having a flat reference plane (1a), and a stepwise half bead structure integrally formed at least on one side of the flat reference plane (1a) of the base plate (1), wherein the half bead structure has half beads (4A, 4B) of two or more steps.

Abstract: A spherical annular seal member has a through hole in a central portion thereof and a partially convex spherical surface portion on an outer surface thereof, and is formed by compression molding a mixture consisting essentially of from 40 to 80% by weight of steel fibers or wool chops, from 3 to 20% by weight of a borosilicate glass powder, and from 15 to 50% by weight of a graphite powder.

Abstract: A metal gasket used for an internal combustion engine is basically formed of a metal plate. The gasket includes at least two openings with a narrow intermediate area therebetween, edge portions situated around the openings, curved portions extending from the edge portions to define the openings, the curved portions situated adjacent to each other extending in the directions opposite to each other, and flange or turning portions extending from the curved portions and located over the edge portions. A stepped portion is located between the edge portions situated adjacent to each other. Therefore, when the gasket is tightened, the stepped portion is compressed to provide a surface pressure thereat to seal the narrow intermediate area.

Abstract: A metal laminate gasket for an internal combustion engine is formed of a first metal plate, a second metal plate situated under the first metal plate, and a plurality of annular plates. The first metal plate includes a base portion, a plurality of curved portions extending from the base portion to define first holes, and a plurality of flanges extending from the curved portions to be disposed over the base portion. Each annular plate is situated between each flange and the base portion, and has at least one flat section and at least one partial bead section disposed at an intermediate portion between the first holes. The partial bead does not extend throughout an entire length of the annular plate. Therefore, when the gasket is tightened, the surface pressure at the intermediate portion can be increased to securely seal thereat. In case the rigidity of a cylinder head is not strong, the gasket is especially useful.