Abstract: A gasket improves sealing performance. A gasket to be placed in an annular groove includes an annular base to be placed in the groove, and a plurality of protrusions arranged at intervals on the base in a circumferential direction of the base. The protrusions protrude from the base to face side surfaces of the groove and have support surfaces with curvatures corresponding to curvatures of the side surfaces of the groove. Each protrusion has a length in the circumferential direction greater than an interval between facing ends of adjacent ones of the protrusions in the circumferential direction.

Abstract: A clutch piston includes a piston that reciprocates in a piston chamber into which an oil flows, and a sealing member configured to seal the oil in the piston chamber. The sealing member includes a proximal portion mounted to an end of the piston and a seal lip that slides on a wall surface of the piston chamber when the piston reciprocates. The end of the piston extends in a direction intersecting the wall surface. The end includes a far-side face disposed on a far side of the piston chamber and a near-side face disposed on a near side of the piston chamber. The near-side face includes a recessed surface to which the proximal portion of the sealing member is mounted, a projecting surface disposed on a nearer side of the piston chamber than the recessed surface, and an inclined surface inclined relative to the recessed surface and the projecting surface and connecting the recessed surface and the projecting surface.

Abstract: A housing unit of a Roots pump includes a rotor housing, which includes a peripheral wall, and a cover member, which closes an opening of the rotor housing. At least one of a mating surface of the peripheral wall or a mating surface of the cover member includes an annular first groove accommodating a seal member. The rotor housing includes a bulging portion including a second groove. The seal member incudes first projections, which project from an annular seal body, and a second projection, which projects further radially inward from the seal body than the first projections. Each first projection includes a distal end that contacts a side surface on a radially inner side or on a radially outer side of the first groove. The second projection is arranged in the second groove to determine the position of the seal body in the first groove.

Abstract: A sealing device is disposed between an inner member and an outer member of a rolling bearing that rotate relative to each other, and that acts to seal a gap between the inner member and the outer member. The sealing device includes an annular rigid part that is to be fixed to an inside of a hole of the outer member, the rigid part made from a rigid material; and an elastic part fixed to the rigid part, the elastic part made from an elastic material. The elastic part includes a seal lip having a truncated cone ring shape that is to be in slidable contact with the inner member or a member fixed to the inner member. Multiple bumps are formed on an inner peripheral surface of the seal lip, and are to be always in slidable contact with the inner member or the member fixed to the inner member. Clearances are provided between the seal lip and the inner member or the member fixed to the inner member in vicinities of the bumps.

Abstract: A seal structure between an oil outlet formed in a first case and an oil inlet formed in a second case and having an end face facing an end face of the oil outlet with a clearance between the end faces, the seal structure including an annular first seal disposed in an increased-diameter hole, which is formed on an outlet side or an inlet side of an oil passage in one of the oil outlet and the oil inlet and has a larger diameter than the oil passage, such that the first seal contacts a step surface located at a boundary between the oil passage and the increased-diameter hole; and an annular second seal harder than the first seal and disposed in the increased-diameter hole such that the second seal contacts the first seal and the end face of the other of the oil outlet and the oil inlet.

Abstract: A microfluidic chip is inserted into a slot that extends horizontally, and is used as a microfluidic device. The microfluidic chip includes an upper surface, a lower surface opposite the upper surface, a flow passage for fluid located between the upper surface and the lower surface, and two communication holes communicating with the flow passage and opening at the upper surface.

Abstract: A heat exchanger includes a heating fluid flow path through which a heating fluid flows, a heated fluid flow path through which a heated fluid flows, a heat radiation unit that stacks a plurality of heat radiation plates in a thickness direction to thereby form a heat radiation flow path communicating with the heating fluid flow path between a plurality of heat radiation plates, a heat receiving unit provided stacked in the thickness direction of the heat radiation plates forming the heat radiation unit, that stacks a plurality of heat receiving plates in the thickness direction to form a heat receiving flow path communicating with a heated fluid flow path between the plurality of heat receiving plates, a heat storage unit formed of a space between the heat radiation unit and the heat receiving unit and a heat storage material filled inside the heat storage unit.

Abstract: A heat management system includes an outdoor heat exchanger that exchanges heat between a heat medium and outdoor air, a compressor that compresses the heat medium heat-exchanged by the outdoor heat exchanger, an indoor heat exchanger that exchanges heat between the heat medium compressed by the compressor and the indoor air, and an external device heat exchanger provided between the outdoor heat exchanger and the compressor, that exchanges heat between the heat generated by an external device and the heat medium.

Abstract: A microfluidic chip includes an upper surface, a lower surface opposite the upper surface, a flow passage for fluid located between the upper surface and the lower surface, a communication hole that communicate with the flow passage and open at the upper surface or the lower surface, and an annular seal formed from an elastomer, the annular seal being placed in contact with or being formed on the upper surface or the lower surface at which the communication hole opens and surrounding the communication hole. The microfluidic chip further includes a support structure fixed at a position within the flow passage, the position overlapping the annular seal, the support structure securing a height of the flow passage so as to prevent blockage of the flow passage.

Abstract: A sealing system includes a housing defining a bore having an internal surface. A rotatable shaft is rotatably disposed in the bore and includes an annular groove disposed in an exterior surface of the rotatable shaft. The annular groove includes a groove bottom and a pair of lateral sidewalls. A seal is formed as a cylindrical annular thermoplastic body having an axial length greater than an axial length of the annular groove and which is bent into a V-shaped cross-section and received in the annular groove so that opposite ends of the seal are disposed in opposite bottom corners of the annular groove. A peak portion of the V-shaped cross section extends radially outward of the annular groove and is engaged with the internal surface of the bore.

Abstract: A two-piece pinion shaft tool for disassembling a two-piece pinion shaft from a rack and pinion housing includes a tool body having an axial opening extending along an axis of the tool body and a transverse opening at least partially communicating with the axial opening. The tool body includes internal threads within the axial opening. A pin is inserted in the transverse opening for engaging a keyway in a first shaft portion of the two-piece pinion shaft. A slide hammer includes a slide portion having external threads engaged with the internal threads of the tool body and a hammer portion disposed on the slide portion. The tool body further includes a first end with a first plurality of fingers extending axially from the tool body and includes a second end with a second plurality of fingers extending axially from the tool body.

Abstract: A sealing device that can suppress entrance of foreign matter into a place between the end surface of a rotating ring and the end surface of a fixed ring. A sealing device 10 that seals the annular gap between a rotating shaft and a housing having a shaft bore into which the rotating shaft is inserted includes a rotating ring unit 100 provided to the rotating shaft and a fixed ring unit 200 provided to the housing. A plurality of protrusions 140 configured to generate an airflow from the rotating ring 130 side to the fixed ring 230 side when the rotating ring unit 100 rotates are provided on the inner peripheral surface of the rotating ring 130.

Abstract: A method for producing a porous hollow fiber membrane for humidification, the method comprising dry-wet spinning a spinning dope comprising a water-soluble organic solvent solution composed of polyphenylsulfone resin and hydrophilic polyvinylpyrrolidone using water as a core liquid; then performing a crosslinking treatment at 120 to 220° C. for 1 to 20 hours; and then dipping the resultant in an acidic solution with a concentration of 5 to 500 ppm. The obtained porous hollow fiber membrane has improved hydrophilicity without impairing the wettability of the porous hollow fiber membrane. Since, humidification performance of the porous hollow fiber membrane alone can be improved, it is effective as a humidifying membrane for fuel cells.

Abstract: This invention provides a highly reliable separator integrated gasket for fuel cells free from deformation of a separator in a gasket molding process. In order to achieve the object, a pair of separators having adjacent portions approaching each other and separation portions separating from each other in a stacked state and having manifold holes opened in the separation portions are stacked via a spacer in which an inner peripheral hole is opened and which enables the circulation of a fluid in a direction orthogonal to the stacking direction so that the manifold hole and the inner peripheral hole are continuous to each other, a stacked object of the separators and the spacer is disposed in a mold, and then a rubber molding material is charged into and cured in gasket molding cavities defined between a surface opposite to the spacer in the separator and the mold.

Abstract: A gasket is formed by extrusion and easily fastened into a groove which can be easily formed by presswork. A gasket is configured to seal a gap between a first member that has a sectionally curved groove and a second member. The gasket includes a rubber-like elastic base and at least two pairs of rubber-like elastic fins. The base can be inserted into the groove, and has a height allowing the base to be compressed when the first member and second member are coupled to each other. The fins protrude at different heights from the both side surfaces of the base, and can elastically deform in a direction opposite to an insertion direction when the base is inserted into the groove so that the fins contact the side walls of the groove. The base and the fins are integrally formed with each other as one unitary member by extrusion.

Abstract: An acrylic rubber composition comprising 0.05 to 3.0 parts by weight of a fluorine-containing compound having a melting point of 30 to 100° C., based on 100 parts by weight of acrylic rubber. The acrylic rubber composition that can improve the dispersibility of a processing aid in the compound and the rubber compound handling properties during open roll operation without using a silicone-based processing aid, which causes bleeding of vulcanizates, and that satisfies the various characteristics, such as dimensional stability and heat resistance, of vulcanizates.

Abstract: Provided is a sealing material having abrasion resistance usable for even construction machinery operated under severe conditions while keeping mechanical strength thereof. The sealing material includes a fluorinated resin composition containing the following materials (1) and (2), and further containing the following material (3) or (4). The materials are: (1) fluorinated resin, (2) bronze, (3) tricobalt tetraoxide, (4) a composite metal oxide containing cobalt and aluminum, and further containing at least one of metals selected from the group of chromium, titanium, magnesium, calcium, and lithium. Preferably, the fluorinated resin is polytetrafluoroethylene. Further, the sealing material is usable for construction machinery.

Abstract: A fuel cell seal structure includes stacked fuel cells and an electrolyte membrane or a film supported between the neighboring metal separators. Each of the stacked fuel cells includes neighboring metal separators each including a plate portion having a plate portion surface, a bead seal portion projecting from the plate portion surface and including a distal end having a distal end surface, an elastic body disposed on the distal end surface, and a stopper disposed on the plate portion surface and away from the elastic body. The neighboring metal separators are disposed such that elastic bodies are located opposed to each other in a stacking direction with the electrolyte membrane or the film supported in between the elastic bodies and face each other, and such that stoppers are located neighboring to each other in the stacking direction with the electrolyte membrane or the film supported in between the stoppers.

Abstract: A sealing structure which can more simply and securely hold a gasket on an upper end of a side wall of a battery case as attached member is provided. A sealing structure includes a gasket and an attachment wall. The gasket has a shape of straddling an upper end of a side wall of a battery case. The gasket on the top surface side is configured to be in tight contact with a cover for covering an opening side of the battery case. The attachment wall is fastened to the side wall of the battery case, and has a placement surface arranged to be in contact with a lower end of an engagement portion arranged on an outer edge of the cover and an lower end of the gasket.

Abstract: A sealing structure which can more simply and securely hold a gasket on an upper end of a side wall of a battery case as attached member is provided. The sealing structure includes a gasket arranged along an upper end side of a side wall of a battery case and an attachment wall fastened to the side wall of the battery case. The gasket includes a gasket main body and a bulging sealing portion. The gasket main body has an upper end arranged higher than the upper end of the side wall. The bulging sealing portion is arranged on the exterior side of the upper end side of the gasket main body, and tightly contacts an inner peripheral surface of an engagement portion arranged on an outer edge of a cover for covering an opening side of the battery case. The attachment wall includes an accommodation portion and an outer peripheral surface. The accommodation portion accommodates a lower side of the gasket main body between the side wall and the attachment wall.