| Kabushiki Kaisha Riken Patent applications |
| Patent application number | Title | Published |
|---|
| 20130062835 | COMPRESSION RING AND ITS PRODUCTION METHOD - To provide a price-competitive compression ring having excellent thermal conductivity and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SUP10 in JIS G 4801, which contains small amounts of alloying elements, is used, and a piston ring wire is annealed before an oil-tempering treatment such that spheroidal cementite having an average particle size of 0.1-1.5 μm is dispersed in a tempered martensite matrix, thereby suppressing the movement of dislocation and creep even at 300° C., and improving thermal sag resistance. | 03-14-2013 |
| 20120282461 | MEMBER HAVING HYDROGEN-CONTAINING, HARD, AMORPHOUS CARBON COATING AND ITS PRODUCTION METHOD - In a member having a hydrogen-containing, amorphous carbon coating having a relatively smooth surface, similarly amorphous, fine carbon particles are dispersed in the hydrogen-containing, amorphous carbon coating to have improved cracking resistance while keeping smoothness on the surface and hardness in the entire coating. Specifically, fine particles discharged from a carbon cathode of an arc evaporation source by arc discharge are introduced into the coating, so that similarly amorphous, fine carbon particles are dispersed in the hydrogen-containing, amorphous carbon coating. | 11-08-2012 |
| 20120245274 | COATING COMPOSITION FOR ENGINE PARTS AND ENGINE PART COMPRISING IT - An engine part coated with an engine-parts-coating composition comprising (i) at least one of a polyfluoroalkyl group and a polyfluoropolyether group, (ii) an organopolysiloxane group, and (iii) an alkoxysilyl group. | 09-27-2012 |
| 20100139586 | CORE FOR THIN-WALL HOLLOW CASTING AND THIN-WALL HOLLOW CASTING PRODUCED BY PRODUCTION METHOD EMPLOYING IT - It is a technical common knowledge that a chaplet used in casting of a hollow casting is fusion-bonded with the melt and is incorporated into the casting. However, the adhesion between the chaplet and the casting body is not necessarily satisfactory, thereby incurring the strength reduction of a thin-wall hollow casting. A core for a thin-wall hollow casting according to the present invention is provided with a chaplet mounted thereon. The chaplet has arcuate portion | 06-10-2010 |
| 20080252902 | Method and Device for Detecting Direction of Member Having Outer Periphery Formed in Vertically Asymmetrical Shape - A method and a device for identifying an upper surface and a lower surface of a component having asymmetric upper and lower outer shapes are provided. The components include, for example, disk-like, cylindrical, or annular components, more specifically engine parts having an orientation such as piston rings. In particular, a method and a device for identifying orientation of an item that hardly allows visual identification of the upper and lower surface. A disk-like, cylindrical, or annular component having asymmetric upper and lower outer shapes is placed on a reference surface having a reference block, an outer peripheral part of the component on the reference surface is brought into contact with the reference block, and identification of the upper and lower surface of the component is achieved in an inline system based on a gap created between the outer peripheral part of the component and the reference block, using a light source lighting device and a detection camera arranged across the reference block. | 10-16-2008 |
