Abstract: The shaft seal device includes a seal cover formed in a tubular shaped and provided on an outer periphery of a rotation shaft which is inserted into an axial hole of a housing, a flexible member that connects the seal cover to the housing, an auxiliary seal portion provided on an interior side of the shaft seal device in an axial direction of the seal cover, a magnetic fluid seal portion provided on an exterior side of the shaft seal device from the auxiliary seal portion in the axial direction of the seal cover, and bearings that support a load of the magnetic fluid seal portion.

Abstract: The shaft seal device includes a seal cover formed in a tubular shaped and provided on an outer periphery of a rotation shaft which is inserted into an axial hole of a housing, a flexible member that connects the seal cover to the housing, an auxiliary seal portion provided on an interior side of the shaft seal device in an axial direction of the seal cover, a magnetic fluid seal portion provided on an exterior side of the shaft seal device from the auxiliary seal portion in the axial direction of the seal cover, and bearings that support a load of the magnetic fluid seal portion.

Abstract: A magnetic fluid sealing structure (1) for high-speed rotation for sealing a gap (S) between a shaft member (2) and a housing member (3) disposed around the shaft member (2), which are rotatable, includes: magnetic force generating means (4) which is fixed to the housing member (3) and generates a magnetic force; magnetic pole members (5) disposed on both sides in an axial direction of the magnetic force generating means (4); and a magnetic fluid (7) which is magnetically held between the magnetic pole members (5) and the shaft member (2) by the magnetic force of the magnetic force generating means (4) and seals the gap (S) therebetween, in which the shaft member (2) has a plurality of different material layers concentrically laminated in a radial direction, and an outermost diameter layer (23) of the shaft member (2), which holds the magnetic fluid (7), is made of a magnetic material.

Abstract: A magnetic fluid sealing structure (1) for high-speed rotation for sealing a gap (S) between a shaft member (2) and a housing member (3) disposed around the shaft member (2), which are rotatable, includes: magnetic force generating means (4) which is fixed to the housing member (3) and generates a magnetic force; magnetic pole members (5) disposed on both sides in an axial direction of the magnetic force generating means (4); and a magnetic fluid (7) which is magnetically held between the magnetic pole members (5) and the shaft member (2) by the magnetic force of the magnetic force generating means (4) and seals the gap (S) therebetween, in which the shaft member (2) has a plurality of different material layers concentrically laminated in a radial direction, and an outermost diameter layer (23) of the shaft member (2), which holds the magnetic fluid (7), is made of a magnetic material.

Abstract: There is provided an electronic component package, in which electronic component element is mounted on a metal base, the electronic component element is covered by placing a metal cap over the metal base, and the metal base and the metal cap are joined by resistance welding to hermetically seal the electronic component element. With this electronic component package, a protrusion is provided to a portion of the metal base that comes into contact with the metal cap, and a projection tip of the protrusion has a flat face. Alternatively, the protrusion has a cross sectional shape that combines an arc member with the top side of an isosceles trapezoid.

Abstract: [Object] An object of the present invention is to provide a contaminant sealing device wherein the pressure force of the sliding part does not increase proportionately even if the sealed fluid pressure increases, and the amount of change in the friction of the sliding part can be reduced relative to the change in the sealed fluid pressure. [Means of Achievement] The contaminant sealing device of the present invention is a sealing device comprising an annular packing for reciprocating movement or rotation, the packing being mounted to one of two members that face each other and being disposed in slidably intimate contact against another of the two members; the sealing device characterized in that the cross-sectional shape of the annular packing is a substantial Y shape, the back portion of the substantial Y shape is disposed so as to face a high pressure side, and a high-pressure fluid acts on a space formed by the back portion of the substantial Y shape and the two members that face each other.

Abstract: A contaminant-sealing device includes a rotating or reciprocatingly moving seal ring attached to one of two mutually opposed members and slidably placed in intimate contact with the other member. The seal ring has a cross-sectional shape that is quadrilateral and has a taper so that a surface of a sliding part is lower towards a high-pressure side and higher towards a low-pressure side, and is being disposed so that a fluid body on the high-pressure side acts on the tapered part.

Abstract: There is provided an electronic component package, in which electronic component element is mounted on a metal base, the electronic component element is covered by placing a metal cap over the metal base, and the metal base and the metal cap are joined by resistance welding to hermetically seal the electronic component element. With this electronic component package, a protrusion is provided to a portion of the metal base that comes into contact with the metal cap, and a projection tip of the protrusion has a flat face. Alternatively, the protrusion has a cross sectional shape that combines an arc member with the top side of an isosceles trapezoid.

Abstract: A vibration damper of a high polymer resin sheet which contains epizoelectric ceramic powder and a cloth layer placed therein including carbon fibers, which provides excellent as well as consistent and reliable damping effects in a relatively wide temperature range and also a method for producing the vibration damper.