A gasket is provided to reduce a reaction force in an attached state and suppress deterioration of sealing performance due to a corrosive foreign matter such as salty water and a snow melting agent. A gasket includes a metal base plate made of metal, and a covering layer formed of an elastic body that covers at least a part of the metal base plate. The metal base plate includes a pair of an upper face and a lower face that are back-to-back to each other, a bead portion protruding toward a side facing the upper face, an inner periphery portion extending from an inner periphery edge of the bead portion, and an outer periphery portion extending from an outer periphery edge of the bead portion. The outer periphery portion extends toward a side facing the lower face, in an oblique manner with respect to a protruding direction of the bead portion.

An electrically isolating gasket is disclosed wherein a coating layer is disposed on at least one conductive surface, and in some embodiments, on all surfaces or at least all of the conductive surfaces. The electrically isolating gasket includes a core gasket component, a ring seal component, and a non-conductive inner seal component. The coating layer can be, for example, polyimide, polyamide, ceramic, and aluminum oxide.

A gasket for a combustion chamber is provided. The gasket comprises a plated surface extending across at least a portion of the metal base. In the gasket, at least a portion of the plated surface includes a laser treated section with a first raised surface that protrudes away from the metal base and the laser treated section is arranged in a mid-span that is arranged between two cylinder openings.

A gasket manufacturing method, which enables an improvement in sealing performance by making the thickness of a gasket formed on a bead on a base member more uniform. The manufacturing method of a separator-integrated gasket includes dispensing a gasket material, and curing the gasket material dispensed on the bead. The bead includes portions having different widths in a short direction thereof. Compared to a moving speed of a dispensing apparatus relative to the separator body in a narrow portion where the width is small, the moving speed is slower in a wide portion having a larger width than the narrow portion.

A gasket plate having a rigid orientation plate retaining at least one seal in a predetermined location in the orientation plate, and a rigid insert placed inside the seal such that the seal interposes the insert and the orientation plate.

A multi-layered metal sheet is disclosed formed of a laminate of a plurality of metal sheets fixed to each other by a clinch formed in a concave shape from one main surface toward another main surface, the clinch has an schematic pillar shape, the clinch being defined by an open top, a pair of cut surfaces which are respectively formed from the open top toward a bottom, a pair of inclined surfaces respectively inclined from the open top toward the bottom, transitional surfaces which connect the cut surfaces and the inclined surfaces to each other, and the bottom having overlapping parts which extend over the main surface of the multi-layered metal sheet on a lower side immediately below the cut surfaces, and lengthwise end portions of a cut formed in each of upper edge portions of the cut surfaces are disposed on upper edge portions of the transitional surfaces.

A multi-layer head gasket having at least two active layers and a shim layer sandwiched there between. The gasket and shim layer include cylinder openings aligned with the cylinders disposed within an engine block. The shim layer incorporates a plated portion for adding topography to an otherwise flat shim layer, the areas of plating determined based on FEA and/or pressure film load testing, for improving fatigue resistance, sealing pressure, and/or loading characteristics of the gasket.

An object is to provide a metal gasket that can form a wide contact width for a counterpart sealing face and that can achieve excellent sealing properties even when a blow hole is generated in the counterpart sealing face, and the object is achieved by a metal gasket having a bead portion to be in contact with a counterpart sealing face to form a sealing portion, formed on a gasket main body. The bead portion includes an arc portion that is convex toward the counterpart sealing face and hem-rising portions that each obliquely rise from the gasket main body toward the arc portion, on both hems of the arc portion. A connection portion between the arc portion and the hem-rising portion is formed to be convex toward a convex side of the bead portion. Plastic distortion for an overall width of the arc portion is lower than that of the connection portion. A contact pressure distribution in the arc portion in a compression state has a shape that is flat and wide in a width direction of the arc portion.

A gasket includes an endless loop of sealing material. The endless loop includes a first segment, a second segment, and a sinuous segment extending from the first segment to the second segment. The gasket includes fastener sections defining fastener holes. The fastener holes extends through the fastener sections. The sinuous segment is between two of the fastener holes. A lip is in each fastener hole. The lip extends from the fastener section into the fastener hole and extends around the circumference of the fastener hole. The sinuous segment retains the gasket in a groove of a cover, and the lip retains a fastener in a fastener hole of the cover.

A gasket for a combustion chamber is provided. The gasket comprises an upper assembly including an upper combustion sealing section with a raised bead positioned between a first component and a second component adjacent to a combustion chamber and an upper fluid sealing section positioned between the first component and the second component at a location spaced away from the combustion chamber. The upper combustion sealing section includes an anti-fret coating on a metal layer, the upper fluid sealing section includes a synthetic rubber coating on a metal layer, and the upper combustion sealing section is greater in thickness than the upper fluid sealing section.