Abstract: Provided is a mineral base oil satisfying the following requirements (I) to (III): Requirement (I): a kinematic viscosity at 100° C. is 2 mm2/s or more and less than 7 mm2/s; Requirement (II): a viscosity index is 100 or more; and Requirement (III): a temperature gradient ?|?*| of complex viscosity between two temperature points ?10° C. and ?25° C. is 60 Pa·s/° C. or less as measured with a rotary rheometer under conditions at an angular velocity of 6.3 rad/s and a strain amount of 0.1 to 100%. The foregoing mineral base oil can become a lubricating oil composition having desirable low-temperature viscosity characteristics, including low-temperature fuel consumption and low-temperature engine start-up performance, and also having excellent high-temperature piston detergency.

Abstract: Provided is a mineral base oil having a kinematic viscosity at 40° C. of 4.0 mm2/s or more and less than 6.0 mm2/s, a kinematic viscosity at 100° C. of 1.0 mm2/s or more and less than 2.0 mm2/s, and a flash point of 140° C. or higher. A lubricating oil composition containing the mineral base oil has a high flash point while having a low viscosity and thus having excellent fuel-saving performance when used as a driving system oil and the like.

Abstract: Provided is a mineral base oil having a kinematic viscosity at 40° C. of 4.0 mm2/s or more and less than 6.0 mm2/s, a kinematic viscosity at 100° C. of 1.0 mm2/s or more and less than 2.0 mm2/s, and a flash point of 140° C. or higher. A lubricating oil composition containing the mineral base oil has a high flash point while having a low viscosity and thus having excellent fuel-saving performance when used as a driving system oil and the like.

Abstract: Provided is a mineral base oil satisfying the following requirements (I) to (III): Requirement (I): a kinematic viscosity at 100° C. is 2 mm2/s or more and less than 7 mm2/s; Requirement (II): a viscosity index is 100 or more; and Requirement (III): a temperature gradient ?|?*| of complex viscosity between two temperature points ?10° C. and ?25° C. is 60 Pa·s/° C. or less as measured with a rotary rheometer under conditions at an angular velocity of 6.3 rad/s and a strain amount of 0.1 to 100%. The foregoing mineral base oil can become a lubricating oil composition having desirable low-temperature viscosity characteristics, including low-temperature fuel consumption and low-temperature engine start-up performance, and also having excellent high-temperature piston detergency.

Abstract: A heat sink includes a base, a first fin provided on the base and including a first cutout portion, a first heat pipe including a first linear portion and a first curved portion, the first curved portion being provided in the first cutout portion, and a second heat pipe including a second linear portion connected to the first fin with an adhesive having a heat conductivity.

Abstract: A heat sink includes a base board, a fin group, heat pipes, and a radiation plate. The fin group includes a plurality of fins arranged on the base board at right angles to the base board. Each of the heat pipes has the shape of the letter “U,” is arranged, on the whole, in parallel with each fin, and conducts heat from the base board to the radiation plate placed on the fin group. The base board and the radiation plate are thermally connected to each fin.

Abstract: A heat radiating device for radiating heat of a circuit, includes a heat pipe which has a first straight portion and a second straight portion parallel with the first straight portion, and a curved portion connected to the first and second straight portions, a first base which is in contact with the circuit and is joined at a first surface thereof opposite to a surface thereof facing the circuit, to the first straight portion; a plurality of first fins which are provided on the first surface, have flat surfaces perpendicular to the first straight portion, and cross the second straight portion; a second base which has a second surface perpendicular to the first base and the first straight portion and is joined to the first heat pipe; and a plurality of second fins which are provided on the second surface and extend to a direction perpendicular to the second surface.

Abstract: A spring-pressurizing unit includes a pair of screw members which are respectively formed with male and female screws to be screwed to each other and in which after the male and female screws are fastened to each other, a shaft having a predetermined length is formed, a spring disposed as to be wound around the shaft, a pressing member which is disposed on one end of the spring and which is pressed toward the spring after the pair of screw member are fastened to each other, thereby compressing the spring, and a support member which supports the pressing member in a state where the pressing member compresses the spring.

Abstract: A heat sink includes a base including a first surface and a second surface facing away from each other, the base being configured to have the first surface thermally connected to a heat generator; and multiple radiation fins extending from the second surface of the base, the radiation fins being reduced in length in accordance with a decrease in the temperature of the base due to the heat conducted from the heat generator, the radiation fins being shaped to bend outward.

Abstract: A spring-pressurizing unit includes a pair of screw members which are respectively formed with male and female screws to be screwed to each other and in which after the male and female screws are fastened to each other, a shaft having a predetermined length is formed, a spring disposed as to be wound around the shaft, a pressing member which is disposed on one end of the spring and which is pressed toward the spring after the pair of screw member are fastened to each other, thereby compressing the spring, and a support member which supports the pressing member in a state where the pressing member compresses the spring.

Abstract: A holding fixture that holds a component and mounts the component on an electronic circuit board includes a holding member that holds the component at a side of a first surface of the electronic circuit board, a first fixing member that includes a first base that is engageable with the holding member, and an elastic member that is pivotally attached to the base, sandwiches the electronic circuit board at a side of a second surface of the electronic circuit board, and elastically supports the holding member at the side of the first surface, the second surface opposing to the first surface, and a second fixing member that includes a second base that is engageable with the holding member, and a projection member that projects from the second surface of the electronic circuit board and is engageable with the elastic member.

Abstract: A holding fixture that holds a component and mounts the component on an electronic circuit board includes a holding member that holds the component at a side of a first surface of the electronic circuit board, a first fixing member that includes a first base that is engageable with the holding member, and an elastic member that is pivotally attached to the base, sandwiches the electronic circuit board at a side of a second surface of the electronic circuit board, and elastically supports the holding member at the side of the first surface, the second surface opposing to the first surface, and a second fixing member that includes a second base that is engageable with the holding member, and a projection member that projects from the second surface of the electronic circuit board and is engageable with the elastic member.

Abstract: A process oil which satisfies the requirements of (a) a content of a polycyclic aromatic compound of less than 3% by weight, (b) a content of an aromatic hydrocarbon of 18% by weight or more, (c) a content of a polar compound ranging from 11 to 25% by weight, (d) a kinematic viscosity at 100° C. ranging from 10 to 70 mm2/s, and (e) a flash point of 210° C. or more.

Abstract: A process oil which satisfies the requirements of (a) a content of a polycyclic aromatic compound of less than 3% by weight, (b) a content of an aromatic hydrocarbon of 18% by weight or more, (c) a content of a polar compound ranging from 11 to 25% by weight, (d) a kinematic viscosity at 100° C. ranging from 10 to 70 mm2/s, and (e) a flash point of 210° C. or more.

Abstract: Process oil which satisfies requirements that a content of a polycyclic aromatic compound is less than 3% by weight, a content of an aromatic hydrocarbon is 18% by weight or more, a content of a polar compound is between 11 and 25% by weight, a kinematic viscosity at 100° C. is between 10 and 70 mm2/s, and a flash point is 210° C. or more.

Abstract: A dehumidifier includes a circular rotor accommodating a humidity absorbing material, a disc member provided on each one of two circular end surfaces of the rotor and having a diameter identical to or greater than a diameter of the rotor, and a plurality of openings formed in the disc members, wherein the rotor rotates through a dehumidification zone and a recycle zone formed by a dividing plate disposed so as to project from each one of the disc members, the rotor circulating a first flow of air of relatively high humidity through the dehumidification zone so as to dehumidify and recycle the first flow of air, the rotor circulating a second flow of air of relatively low humidity through the recycle zone so as to dehumidify the humidity absorbing material. The openings in the disc members have an identical substantially fan shape and are disposed so as to radiate from a center of the disc member, thus exposing the humidity absorbing material accommodated therein.

Abstract: A light-transmitting plastic fiber comprising, as a core component, a methacrylimide group-containing polymer prepared by polymerizing methyl methacrylate in the absence of a chain transfer agent and then imidizing the methyl methacrylate polymer thus prepared, and another polymer as a sheath component.

Abstract: A flameresisting apparatus in which two sections, referred to as roller compartments, enclosing a series of rollers provided face to face with one another for transferring precursor fiber, are separated from a heat treatment section by two walls facing each other. The walls include apertures for passage of the precursor fiber. Significantly, the two walls facing each other are provided at a distance which enables the precursor fiber to pass from one wall to the other in 5 to 60 seconds. The surface temperature of the rollers and the temperature of the roller compartments are maintained at a temperature of 10.degree. to 80.degree. C. lower than the temperature of the heat treatment compartment, but not lower than 180.degree. C. In addition, heated air is blown against the precursor fiber into the heat treatment compartment.

Abstract: Disclosed is a thermoplastic methacrylimide-containing polymer comprising 2 to 100% by weight of structural units represented by the following formula (I): ##STR1## wherein R is hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, and 0 to 98% by weight of structural units derived from an ethylenically unsaturated monomer, wherein the number of fine particles having a size of 0.5 to 25 .mu.m as measured by a particle counter in the polymer is not more than 50,000 per gram of the polymer.

Abstract: A thermoplastic methacrylimide-containing polymer comprising 2 to 100% by weight of structural units represented by the following formula (I): ##STR1## wherein R is hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, and 0 to 98% by weight of structural units derived from an ethylenically unsaturated monomer, wherein the content of iron in the polymer is not larger than 20 ppm and the difference between the maximum value and minimum value of the degree of imidization is preferably not larger than 5% by weight. This methacrylimide-containing polymer is used alone or as a blend thereof with another thermoplastic polymer.