Abstract: In a tabular metal gasket having a plurality of bolt holes, a seal bead is provided between bolt holes which are adjacent to each other, one end of the seal bead is connected to the one bolt hole and the other end of the seal bead is connected to the other bolt hole. The seal bead is formed into a gradually changing shape in which a width is the narrowest at the center portion between the bolt holes and the width is gradually enlarged from the center portion between the bolt holes toward the bolt holes, and satisfies the following expression (a): D>d?W1 in which D is a diameter of a head seat surface of a fastening bolt which is inserted into the bolt hole, d is a diameter of the bolt hole, and W1 is the maximum width of the seal bead.

Abstract: A seal structure has one metal gasket arranged between a pair of casings. The metal gasket is provided with a planate outer peripheral portion and a bead portion which is formed by rising up from an inner peripheral end portion of the outer peripheral portion, and is arranged so that the bead portion comes into contact with the one casing, and the outer peripheral portion comes into contact with the other casing. The bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, when the metal gasket is pinched by the pair of casings, and a leading end of the outer peripheral portion comes into contact with one casing at this time, whereby any gap in which salt water stays is not formed between one casing and the metal gasket.

Abstract: Provided is a seal bead structure of a gasket capable of reducing the reactive force generated in a common bead portion provided between multiple through-holes and thereby capable of achieving a stable sealing function by means of aligning the compression property over the entire bead. In order to achieve this, two through-holes are provided in a row in the flat portion of a metal gasket, with one seal bead provided on the edge of one through-hole, the other seal bead provided on the edge of the other through-hole, and a common bead portion for the both seal beads provided in the intermediate position between the both through-holes, the common bead portion having a two-stage half bead shape in which the half beads are formed on two stage in the same direction.

Abstract: 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.

Abstract: A seal structure has a metal gasket arranged between a pair of casings. The metal gasket is provided with a bead portion in an inner peripheral side of a planate outer peripheral portion, and a bent portion in an outer peripheral side. When the metal gasket is pinched by a pair of casings, the bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, and comes into contact its outer peripheral end portion with one casing, whereby any gap in which salt water stays is not formed between one casing and the outer peripheral portion, and the bent portion comes into contact with the other casing, whereby any gap in which the salt water stays is not formed between the other casing and the outer peripheral portion.

Abstract: A seal structure has one metal gasket arranged between a pair of casings. The metal gasket is provided with a planate outer peripheral portion and a bead portion which is formed by rising up from an inner peripheral end portion of the outer peripheral portion, and is arranged so that the bead portion comes into contact with the one casing, and the outer peripheral portion comes into contact with the other casing. The bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, when the metal gasket is pinched by the pair of casings, and a leading end of the outer peripheral portion comes into contact with one casing at this time, whereby any gap in which salt water stays is not formed between one casing and the metal gasket.

Abstract: Provided is a metal substrate gasket with a filter function that is easy to machine/assemble and is capable of reducing the number of parts as well as cost. To achieve said purpose, the metal substrate gasket with filter function, which is provided with a filter section in which holes have been drilled on a portion of the flat surface of the metal substrate and is provided with a sealing section around the filter section, is characterized in that in the sealing section, respective elastic rubber seals cover the two surfaces of the metal substrate in the thickness direction. The metal substrate gasket is also characterized in that a sealing bead section is formed in the metal substrate in the sealing section.

Abstract: A seal structure has a metal gasket arranged between a pair of casings. The metal gasket is provided with a bead portion in an inner peripheral side of a planate outer peripheral portion, and a bent portion in an outer peripheral side. When the metal gasket is pinched by a pair of casings, the bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, and comes into contact its outer peripheral end portion with one casing, whereby any gap in which salt water stays is not formed between one casing and the outer peripheral portion, and the bent portion comes into contact with the other casing, whereby any gap in which the salt water stays is not formed between the other casing and the outer peripheral portion.

Abstract: Provided is a seal bead structure of a gasket capable of reducing the reactive force generated in a common bead portion provided between multiple through-holes and thereby capable of achieving a stable sealing function by means of aligning the compression property over the entire bead. In order to achieve this, two through-holes are provided in a row in the flat portion of a metal gasket, with one seal bead provided on the edge of one through-hole, the other seal bead provided on the edge of the other through-hole, and a common bead portion for the both seal beads provided in the intermediate position between the both through-holes, the common bead portion having a two-stage half bead shape in which the half beads are formed on two stage in the same direction.

Abstract: [Problem] To provide a metal gasket capable of realizing a uniform surface pressure by a bead of the metal gasket and a uniform collapse ratio of the bead, while restricting deformation of flanges upon bolt fastening. [Mechanism for Solving the Problem] A metal gasket to be provided for sealing joint surfaces between two members. The metal gasket includes: a flow passage opening (4) which corresponds to a flow passage definitely provided between and through the two members; multiple bolt holes (3), through which bolts for tightening the two members to each other are penetrated, respectively; and a bead (5). The bead (5) is configured with a height and a width which become higher and wider from the vicinity of each bolt hole (3) in a direction separating therefrom, respectively.