Abstract: A sealing device capable of suppressing depletion of lubricant is provided. A sliding surface of a side lip 220 at a position away from a distal end of the side lip 220 is provided with a plurality of annular grooves 222 adjacent each other, each of all parts that form annular protrusions 223 between adjacent annular grooves 222 protrudes most at a center in a width direction thereof, with an amount of protrusion gradually decreasing with increasing separation from the center, and both sides of the center in the width direction are symmetric in shape. A tip portion of the sliding surface of the side lip 220 on the distal side of a region, which is provided with the plurality of annular grooves 222, is configured to make a planar contact with an end face of the annular member.

Abstract: A metal gasket includes: a straight section provided with a bolt hole; a bead section raised from an inner peripheral edge of the straight section toward one side of the direction of the thickness of the gasket; and a bent section bent from an outer peripheral edge of the straight section toward the other side of the direction of the thickness of the gasket. When metal gasket is compressively sandwiched by a pair of housings, bead section elastically deforms to decrease height, and straight section elastically deforms, whereby the inner peripheral edge of the straight section contacts one of the housings, the outer peripheral edge of the straight section contacts the other housing, and the bent section contacts the one of the housings. A gasket installation determination projection is part of the periphery and provided on the outer peripheral edge of the bent section or of the straight section.

Abstract: A seal ring capable of stabilizing sealing performance while reducing rotation torque. A seal ring 100 has a plurality of first dynamic pressure generation groove 131 and a plurality of second dynamic pressure generation groove 132 on an outer peripheral surface thereof with intervals in the circumferential direction, the plurality of first dynamic pressure generation groove 131 extending from a position close to a first side surface 100A with respect to the center of width in an axial direction to the first side surface 100A and configured to generate dynamic pressure with relative rotation between a housing and the seal ring 100, and the plurality of second dynamic pressure generation groove 132 extending from a position close to a second side surface 100B with respect to the center of width in the axial direction to the second side surface 100B and configured to generate dynamic pressure with the relative rotation between the housing and the seal ring 100.

Abstract: A hydrogenated NBR composition comprising 30 to 200 parts by weight of titanium oxide and 1 to 8 parts by weight of magnesium oxide, based on 100 parts by weight of hydrogenated NBR. By forming a crosslinked rubber layer of the rubber composition on a metal plate, a gasket material with excellent blister resistance, whose roll kneadability is improved without reducing the rubber strength of hydrogenated NBR, is provided. Moreover, the rubber composition is effective as a rubber raw material for use in soft metal or a high hardness hydrogenated NBR material for which kneading processing is difficult.

Abstract: A circular annular seal ring made of a resin is disposed between an inner member and an outer member that rotate relative to each other. The outer member includes a liquid-storing space and an inner surface having a circular cross section. The inner member is disposed in the liquid-storing space and includes a circumferential groove. The seal ring is stationary relative to the outer member and is slidably disposed in the circumferential groove of the inner member. Grooves are formed on an end surface on an external space side of the seal ring. Each groove has an end portion that opens at an inner peripheral surface of the seal ring, and extends in a direction opposite to a main rotational direction of the inner member relative to the seal ring from the open end portion, but does not extend in the main rotational direction from the open end portion.

Abstract: A device is used for forming a part by welding a plurality of members together, and includes a jig on one side having a joint face on one side, which is adapted to contact one of faces exposed on the outer surface sides of the plurality of members overlaid one on top of the other, and an opening on one side corresponding to a portion of desired welded portions of the part; a jig on another side having a joint face on the other side, which is adapted to contact another face of the faces exposed on the outer surface sides of the plurality of members, and an opening on the other side corresponding to another portion of the desired welded portions of the part and not corresponding to the opening on one side; a laser welding machine on one side that is configured to emit a laser beam toward the opening on one side; and a laser welding machine on the other side that is configured to emit a laser beam toward the opening on the other side.

Abstract: A recessed part formed on a side surface includes a dynamic pressure part extending in the circumferential direction to converge on the side surface, and an introduction part extending from the dynamic pressure to open the dynamic pressure part toward the inner periphery side. One or two inner peripheral wall parts are provided for each of the recessed parts. The inner peripheral wall part is a portion defined on the inner periphery side of the corresponding recessed part by the dynamic pressure part and the introduction part. The inner peripheral wall part includes an inner peripheral wall surface. The inner peripheral wall surface extends toward the introduction part in the circumferential direction with inclining with respect to the side surface such that the inner peripheral wall surface is depressed from the side surface.

Abstract: A gasket material comprising a crosslinked fluororubber layer having a micro-hardness of 5 to 25 formed on a metal plate using a fluororubber composition comprising 30 to 70 parts by weight of carbon black having a CTAB specific surface area of 3 to 34 m2/g, and 5 to 15 parts by weight of hydrated amorphous silicon dioxide having a BET specific surface area of 35 to 220 m2/g, based on 100 parts by weight of fluororubber, wherein the total amount of carbon black and hydrated amorphous silicon dioxide is 80 parts by weight or less.

Abstract: A sealing structure includes a sealing device including a first seal lip having a first seal-lip end, and a support ring that supports the first seal lip; and a plurality of members that define an attachment space into which the sealing device is attached, the members including an inner peripheral wall arranged on the inner periphery side of the sealing device, a first end wall arranged on one axial end of the sealing device, and a second end wall arranged on another axial end of the sealing device. The first seal-lip end has a certain amount of interference with the inner peripheral wall and the first end wall so that its radial reaction force radially presses the support ring outward and its axial reaction force presses the support ring toward the second end wall.

Abstract: A method for manufacturing a sealing device to improve the positioning accuracy of a parting operation while also improving manufacturing efficiency. The method includes molding an elastomeric cylindrical molded body (100a) with a plurality of cylindrical surface portions (130) and a plurality of annular outer peripheral convex portions (110) arranged alternately on an outer peripheral side thereof, and further provided with a plurality of cylindrical surface portions and a plurality of annular inner peripheral convex portions arranged alternately on an inner peripheral side thereof. The cylindrical surface portions on the outer peripheral side and the cylindrical surface portions on the inner peripheral side, as well as the outer peripheral convex portions and the inner peripheral convex portions are provided so as to be at the same positions in the axial direction.

Abstract: A method of manufacturing a separator assembly for fuel cell includes a separator assembly forming step in which a separator assembly including a first metal separator and a second metal separator each having a protruding bead portion is formed by joining together the surfaces of the first and second metal separators opposite from their respective bead portions protruding, and a preload applying step in which a pair of platens apply a preload in a thickness direction of the separator assembly to a bead seal section formed of one pair of the bead portions, and thereby the bead seal section is plastically deformed. In the preload applying step, the preload applied to a linear portion of the bead seal section is set to be smaller than the preload applied to a curve portion of the bead seal section.

Abstract: A seal member includes pushing projections that project from a seal body toward at a groove inner-side circumferential surface and are arranged at intervals in a circumferential direction of the seal body. The pushing projections push the seal body against the groove inner-side circumferential surface and a groove outer-side circumferential surface between the groove inner-side circumferential surface and the groove outer-side circumferential surface. This reduces the gap between the groove outer-side circumferential surface and the seal member in the seal accommodating groove. Thus, salt water is unlikely to collect in the gap between the groove outer-side circumferential surface of the seal accommodating groove and the seal member. This improves the corrosion resistance of the housing and the seal member.

Abstract: A welding jig device is used for forming a part by welding a plurality of members together, and includes a jig on one side having a joint face on one side, which is adapted to contact one of faces exposed on the outer surface sides of the plurality of members overlaid one on top of the other, and an opening on one side corresponding to a portion of desired welded portions of a part; and a jig on another side having a joint face on the other side, which is adapted to contact another face of the faces exposed on the outer surface sides of the plurality of members W, and an opening on the other side corresponding to another portion of the desired welded portions of the part and not corresponding to the opening on the one side.

Abstract: To provide a sealing apparatus in which a uniform amount of grease can be applied to an inner circumferential surface of both a main lip and an auxiliary lip in a circumferential direction. A sealing apparatus 10 includes: a main lip 122 which is slidable on a shaft; an auxiliary lip 221 which is provided on a sealed fluid side with respect to the main lip 122 and which is slidable on the shaft; and grease G applied to an inner circumferential surface of both the main lip 122 and the auxiliary lip 221, wherein the sealing apparatus 10 further includes an auxiliary lip-side annular projection 222 which extends from an auxiliary lip 221 side toward a main lip 122 side to a position not in contact with the main lip 122 and which prevents the grease G from entering radially outwardly.

Abstract: A sealing apparatus which seals an annular gap of a hole into which a shaft is to be inserted, includes a sealing apparatus body to be fitted into the hole, and a slinger to be attached to the shaft. The sealing apparatus body includes a reinforcing ring annular around an axis line, and an elastic body portion attached to the reinforcing ring and annular around the axis line. The slinger includes a flange portion extending toward an outer periphery side and annular around the axis line. The elastic body portion includes an end-face lip extending on one side in an axis line direction, contacting the flange portion from another side in the axis line direction, and annular around the axis line.

Abstract: An apparatus for processing an elongated structure includes a mold within which an uncross-linked rubber material is placed, at least one heating unit configured to heat the mold, and a pressure device configured to press the rubber material using the mold heated by the heating unit to promote shaping the rubber material by the mold while proceeding the cross-linking of the rubber material. The heating unit includes a central heating device configured to heat a longitudinal central portion of the mold, multiple cooling devices configured to cool two longitudinal end portions of the mold, multiple intermediate heating devices configured to heat two intermediate portions between the longitudinal central portion and the longitudinal end portions of the mold, heat shield plates disposed between the central heating device and the intermediate heating devices, and heat shield plates disposed between the cooling devices and the intermediate heating devices.

Abstract: A sheet-shaped cushioning rubber including a planar base portion and a three-dimensional portion formed to rise from the base portion toward one side in a sheet thickness direction, the planar base portion and the three-dimensional portion being alternately provided in one direction of a sheet plane, wherein the three-dimensional portion includes a hollow portion that opens toward the other side in the sheet thickness direction. The three-dimensional portion is integrally provided with a first rising surface that is continuous from the base portion, a top surface, a second rising surface on a side opposite to the first rising surface, and a pair of rising surfaces on both sides in a sheet width direction, and the hollow portion opens only toward the other side in the sheet thickness direction.

Abstract: A sealing device seals a rod having a cylindrical part and a cylindrical guide that guides reciprocation of the rod in an axial direction of the rod. The sealing device includes an elastic ring formed of an elastic material, and a rigid ring formed of a rigid material fixed to the elastic ring for reinforcing the elastic ring. The elastic ring includes a lip with which an outer peripheral surface of the rod is in slidable contact. The rigid ring includes a rigid-ring cylindrical part located radially outside an end portion of the guide. The rigid-ring cylindrical part includes multiple hook hasps engaged into at least one recess formed on an outer peripheral surface of the guide. Each of the multiple hook hasps includes a root portion and a distal end portion located radially inward of the root portion and fitted into the recess. A thin portion is formed at the root portion of the hook hasp, the thin portion being thinner than other parts of the hook hasp.

Abstract: A gasket has a gasket member including a metal sheet and rubber layers put over both faces of the metal sheet. The gasket member includes a seal bead, at least one insertion hole, and at least one dummy bead. The seal bead is a part protruding from a lower face of the gasket member side toward an upper face of the gasket member side. The insertion hole is a through hole into which a fastener is inserted. The dummy bead is a part protruding from the lower face of the gasket member side toward the upper face of the gasket member side. The dummy bead extends around the insertion hole. A resonance frequency of the gasket member is adjusted by a length of the dummy bead in a direction of extension.

Abstract: A sealing device includes an annular reinforcing ring and an elastic body part, and the elastic body part has an annular seal lip, an annular dust lip, and an annular side lip. The side lip extends toward the outer side on an outer periphery side of the dust lip, and includes a distal end portion, a middle portion, and a root portion. The root portion is an annular portion, the middle portion is a portion that is outside of the root portion, and an annular portion that increases in diameter toward an outward side, and the distal end portion is a portion that is outside the middle portion, and an annular portion that increases in diameter toward an outward side. The distal end portion is bent to an inner periphery side from the middle portion.