Abstract: A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part comprises a ridge part formed of a crowning with varied tooth thickness, and a hub tooth part comprises a ridge part having tooth thickness formed in a specified linear shape and having an inner diameter varying from the end part thereof to a shaft shank side. A first step part swelling to the hub tooth part is formed in the bottom part of the shaft tooth part, and a second step part recessed in a direction opposite to the shaft tooth part is formed in the ridge part of the hub tooth part. The start point of the first step part and the start point of the second step part are set at positions offset by a specified distance from each other.

Abstract: A bearing device for a drive wheel having a knuckle member surrounding a part of a cup part through a clearance. An annular first seal member is disposed between the knuckle member and an outer ring member. An opening part is formed between the peripheral edge part of the knuckle member and the large diameter end part of a joint boot. A recessed part formed in the first seal member is installed to be opened toward the joint boot.

Abstract: A surface modifying jig of an engine valve comprising a substantially circular ring portion for holding the valve head of an engine valve, a head holding portion having a diameter decreasing gradually downward from the inner circumferential side of the ring portion, and a stem holding portion formed below the head holding portion with a substantially constant diameter. When plasma nitriding is performed, the valve head comes into annular line contact with the ring portion and being held by the head holding portion while kept in annular plane contact therewith, and a valve stem is held by the stem holding portion while kept in annular plane contact therewith.

Abstract: A constant velocity joint, wherein all rolling elements annularly held by a tool are inserted into an inner diameter part from one end opposite to the flange part of a roller member along the axis of the inner diameter part of the roller member or the rolling elements remaining after one rolling element is removed from all rolling elements are charged into the inner diameter part and the removed one rolling element is inserted into a clearance between the rolling elements from the other end along the axis of the inner diameter part. After all rolling elements are fitted into the inner diameter part of the rolling member, a snap ring is fitted into an annular groove formed at the end part of the inner diameter part on the opposite side of the flange part to hold the rolling elements between the flange part and the snap ring.

Abstract: A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part having a plurality of linear spline teeth is formed at the end part of the shaft and a hub tooth part having a plurality of linear spline teeth fitted to the end part of the shaft is formed in the inner peripheral surface of a shaft hole in the hub. A first step part is formed by swelling the shaft tooth part toward the hub tooth part from a point (P1) horizontally moved from the center point (P0) of the shaft tooth part to a shaft shank side. On the ridge part side of the hub tooth part, a point is set at a position offset from the point (P1) horizontally to the opposite side of the shaft shank, and a second step part increased in a diameter from the point (P2) in the radial outer direction is formed.

Abstract: A reduced-diameter portion (44) with a taper portion (46), a portion whose diameter is reduced in a tapered form, is provided on an inner peripheral wall of a cylinder sleeve (20a, 20b, 20c). On the outer peripheral wall of the top end of the cylinder sleeve (20a, 20b, 20c) is provided a large diameter portion (36a, 36b, 36c) projected outward along the diameter direction. Under the action of a friction stir welding tool (50), the cylinder sleeve (20a, 20b, 20c) inserted in a communication hole (16) of a block body (18) is joined to the block body (18) with the reduced-diameter portion (44) and the large-diameter portion (36a, 36b, 36c) in between. A closed deck-type cylinder block (10) is constructed with the process above. In the cylinder block (10), the gasket face (12) side of a water jacket (22) is closed by the large-diameter portion (36a, 36b, 36c).

Abstract: Roller members of a constant velocity universal joint are externally fitted to trunnions with a plurality of needle bearings interposed between the roller members and the trunnions. The roller member has an inner diameter portion having an L-shaped cross section by a flange section which protrudes radially inwardly and an annular recess section which is provided and defined by a gap with respect to the trunnion. The plurality of needle bearings are retained on the inner diameter portion of the roller member by paste wax.

Abstract: A method of producing a light absorbing layer of CIGS for a solar cell by forming a precursor film on a back electrode and treating the precursor film in a selenium atmosphere, wherein an alkali layer is formed on the back electrode by dipping the back electrode in an aqueous solution containing alkali metals and drying and then a laminated precursor is formed on the alkali layer. By applying this method, the alkali layer whose components of Ia-group elements are diffused into the light absorbing layer to improve power conversion efficiency thereof can be easily formed with no fear of denaturing the back electrode and peeling of the layer at the boundary between the light absorbing layer and the back electrode.

Abstract: A method of producing a light absorbing layer of CIGS for a solar cell by forming a precursor film on a back electrode and treating the precursor film in a selenium atmosphere, wherein an alkali layer is formed on the back electrode by dipping the back electrode in an aqueous solution containing alkali metals and drying and then a laminated precursor is formed on the alkali layer. By applying this method, the alkali layer whose components of Ia-group elements are diffused into the light absorbing layer to improve power conversion efficiency thereof can be easily formed with no fear of denaturing the back electrode and peeling of the layer at the boundary between the light absorbing layer and the back electrode.

Abstract: The surface of an aluminum alloy high-temperature processed article containing Mg is heated at a high temperature of 200° C. or above, thereafter the surface is etched with an aqueous solution containing a chelating agent, and then at least one surface treatment selected from hydration oxidation treatment, coating type chromating, coating, anodizing, and alternating current electrolysis in an aqueous alkali solution is further carried out. This method can provide a surface-treated aluminum alloy high-temperature processed article having superior anticorrosion and adhesion of coatings and a good surface appearance, and is effective as a pretreatment for further surface treatment.

Abstract: The present invention disclosed is an aluminum alloy plate for super plastic molding capable of cold pre-molding before super plastic molding. The alloy plate comprises Mg at from 2.0 to 8.0% (weight %, the same shall apply hereinafter) Be at from 0.0001 to 0.01%, at least one of Mn at from 0.3 to 2.5%, Cr at from 0.1 to 0.5%, Zr at from 0.1 to 0.5% and V at from 0.1 to 0.5%. Additionally, the alloy plate may comprise an Fe amount and an Si amount each within a range of 0.0 to 0.2%; amounts of Na and Ca within ranges of 3 ppm or less and 5 ppm or less, respectively; while the remainder of the alloy plate consists of Al and inevitable impurities. The resulting alloy plate a crystalline structure is a non-recrystallized crystal structure; the 90° critical bending radius is 7.5 times the plate thickness or less; and the yield strength ratio before and after the final annealing is 70% or more. The invention also discloses production methods for the alloy plate.

Abstract: A radar device capable of discriminating a person possessing metals from a person having no metals by transmitting a radio wave includes a voltage controlled oscillator for generating a radio wave, an antenna for transmitting the radio wave generated by the voltage controlled oscillator and for receiving a reflected wave from metals as an object irradiated by the radio wave transmitted by the antenna, a multiplier for detecting a beat component of the wave transmitted by the antenna and the reflected wave received by the antenna, and an FFT operator for analyzing a frequency spectrum of the beat component detected by the multiplier, a recording unit for previously storing a predetermined reference pattern, and a comparison unit for comparing the analyzed result by the FFT operator with the reference pattern stored in the recording unit.

Abstract: An aluminum material is surface-treated with an aqueous solution containing 0.005 mol/lit. or more of a chelating agent and 5 g/lit. or more of an organic amine and having 100 ppm or less of phosphoric acid radical ion concentration and 500 ppm or less of sulfuric acid radical ion concentration, until its surface has a color tone (S) of:S=(X.sup.2 +(3.388Z-3Y.sup.2).sup.1/2.gtoreq.70wherein X, Y and Z represent the tristimulus values of color.The aluminum material can be surface-treated while setting the treating conditions on the basis of a specific color tone detectable by colorimetry, without relying on experience and intuition. The surface-treated aluminum material can have a good anticorrosion, have good color change preventive properties, a good adhesion of coatings and a beautiful surface appearance.