Abstract: A positive electrode active material for use in a non-aqueous electrolyte secondary cell comprises a powdery metal oxide (LiCoO2, LiNiO2, LiMn2O4 or the like). When the positive electrode active material is classified with a classification precision index ? of 0.7 or greater so as to obtain a coarse powder having a classification ratio in a range of 0.1% to 5%, a ratio (B/A) of the content (B) of an impurity metal element in the coarse powder obtained by the classification to the content (A) of the impurity metal element in the powder before the classification is 1.5 or less. The contents of the impurity metal elements are compared with respect to Ca, Mn, Fe, Cr, Cu, Zn and the like (exclusive of the metal element constituting the powdery metal oxide). The positive electrode active material for a secondary cell serves to improve cell performance capabilities and production yields.

Abstract: A positive electrode active material for use in a non-aqueous electrolyte secondary cell comprises a powdery metal oxide (LiCoO2, LiNiO2, LiMn2O4 or the like). When the positive electrode active material is classified with a classification precision index &kgr; of 0.7 or greater so as to obtain a coarse powder having a classification ratio in a range of 0.1% to 5%, a ratio (B/A) of the content (B) of an impurity metal element in the coarse powder obtained by the classification to the content (A) of the impurity metal element in the powder before the classification is 1.5 or less. The contents of the impurity metal elements are compared with respect to Ca, Mn, Fe, Cr, Cu, Zn and the like (exclusive of the metal element constituting the powdery metal oxide). The positive electrode active material for a secondary cell serves to improve cell performance capabilities and production yields.

Abstract: The present invention provides a positive electrode active material comprising: a positive electrode active material body; and at least one of oxide particles and carbon particles each having an average diameter of 1 &mgr;m or less; wherein at least one of oxide particles and carbon particles are adhered to a surface of the positive electrode active material body. I is preferable that a mass of the oxide particles adhered to the positive electrode material body is 0.001-2% of a mass of the positive electrode active material body. According to the above structure, there can be provided a positive electrode active material and non-aqueous secondary battery using the same capable of increasing a molding density (packing density) of the active material in a positive electrode, and capable of improving discharging rate characteristic of the battery by lowering an impedance of the electrode.

Abstract: A positive electrode active material for nonaqueous electrolytic solution secondary batteries is substantially made of a Li containing transition metal composite oxide, which has a composition expressed by LixMySzO2 (wherein M is a transition metal, such as Co, Ni, Mn, Fe and V, and 0.9≦x≦1.15, 0.8≦y≦1.00, and 0<z<0.001). Such positive electrode active material is excellent in particle size controllability (miniaturization and sharpening of the particle size distribution). A nonaqueous electrolytic solution secondary battery comprises a positive electrode, a separator, a negative electrode, a battery case accommodating these, and a nonaqueous electrolytic solution filled in the battery case. The positive electrode contains the positive electrode active material for the nonaqueous electrolytic solution secondary battery expressed by the aforementioned general formula.

Abstract: The present invention provides a positive electrode active material comprising: a positive electrode active material body; and at least one of oxide particles and carbon particles each having an average diameter of 1 &mgr;m or less; wherein at least one of oxide particles and carbon particles are adhered to a surface of the positive electrode active material body. I is preferable that a mass of the oxide particles adhered to the positive electrode material body is 0.001-2% of a mass of the positive electrode active material body. According to the above structure, there can be provided a positive electrode active material and non-aqueous secondary battery using the same capable of increasing a molding density (packing density) of the active material in a positive electrode, and capable of improving discharging rate characteristic of the battery by lowering an impedance of the electrode.

Abstract: The rolling guide unit has a track rail formed with raceway surfaces, a casing moveable relative to the track rail and having raceway surfaces at positions facing the raceway surfaces of the track rail, and a number of cylindrical rolls that run rolling between the facing raceway surfaces. An end portion of that raceway surface of the track rail which is heavily loaded with a distributed load is crowned to make the raceway surface at the end portion curved, thereby eliminating uneven load and therefore dents and flaking of the raceway. This enhances durability and sliding characteristics of the raceway surfaces.

Abstract: In the linear motion rolling guide unit according to this invention, the under seal is made up of a metal core member and a seal member. The metal core member is formed with a through-hole through which to insert a bolt. When the table is mounted on the casings, the bolts can be easily passed through the under seal by cutting a part of the seal member that corresponds in position to the through-hole in the core member. Therefore, in mounting the table to the casings, it is possible to apply a single kind of under seal to both types of structure--the top bolt insertion construction and the bottom bolt insertion construction --thus permitting the common use of components among the two constructions and reducing cost.

Abstract: The linear motion rolling guide unit has: a track rail; a casing slidable relative to the track rail and having a pair of raceway surfaces; end caps mounted to the casing; V-shaped grooves formed between the raceway surfaces of the casing; a retainer having an engagement projecting portion engaged in the V-shaped groove; and a number of rollers circulating in contact with the facing raceway surfaces. The overall length of the retainer is set larger than that of the casing, and the ends of the retainer are engaged in the engagement grooves in the end caps to position the end caps with respect to the casing. Therefore, the positioning of the end caps on the casing can be made accurately without being affected by heat-treatment-induced deformation and machining errors.