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Patent Searching and Data


Matches 601 - 650 out of 2,166

Document Document Title
JP2009024846
To provide a touchdown bearing capable of improving seizure resistance and abrasion resistance.This touchdown bering (an angular ball bearing 7) is provided in a magnetic levitation type turbo-molecular pump having an axial magnetic bear...  
JP2009012061
To provide a laser-beam working machine with which a compressed residual stress layer can be formed on the surface of a material to be worked under state of maintaining the precision of the surface roughness even to the material to be wo...  
JP2009014167
To secure the reliability of a chain tensioner by improving the durability of a check valve retainer.The check valve 20 which allows only the flow of the operation oil from the outside of a cylinder into a pressure room 16 is composed of...  
JP2009014126
To inexpensively produce a roller bearing capable of securing a sufficient service life under a condition with foreign substances entrapped.Before hardening cylinder rollers 7, 7, both axial end edges of these cylinder rollers 7, 7 are c...  
JP2009007602
To provide a rust-preventive method hardly causing the corrosion of a base material and the reduction of a mechanical strength, and to provide a rolling device hardly causing rust and long in service life.A self-aligning roller bearing c...  
JP2008307680
To provide a method to treat a surface of ferritic/martensitic 9-12% Cr steel or austenite Cr steel for the purpose of achieving improved durability against oxidation and solid particle erosion at application temperature above 500C, in p...  
JP2008307679
To develop a method for surface treatment of ferritic/martensitic 9-12% Cr steel capable of changing structure of the ferritic/martensitic 9-12% Cr steel so as to perform remarkably improved oxidation behavior and durability improved to ...  
JP2008304014
To provide a traction drive with an elastic ring having improved fatigue strength, and to provide its surface treatment method.The traction drive 1 comprises a plurality of planetary rollers 7 arranged neighboring one anther around the o...  
JP2008281064
To provide a ball screw mechanism avoiding abrasion of a ball or damage of a nut, and ensuring smooth movement.Shot-peeling work is applied to at least a part of a female screw groove 2a of a nut adjacent to an attachment hole 2b, and th...  
JP2008280609
To provide a structural member for automobile, two-wheeled vehicle or railway vehicle excelling in shock absorption performance, shape fixability and flange portion cuttability, and to provide a process for manufacturing the same.The str...  
JP2008274744
To provide a method of manufacturing a long welded rail which is improved in fatigue strength at a weld zone compared with a conventional long welded rail.According to the method of manufacturing the long welded rail, at least two rails ...  
JP2008274414
To provide a method for manufacturing a long rail, improving the fatigue strength of a welded part in comparison with the conventional rail.The method for manufacturing the long rail is provided with: a process for manufacturing the long...  
JP2008274415
To provide a method for manufacturing a long rail improving the fatigue strength of a welded part in comparison with the conventional rail.In the method for manufacturing the long rail, at least two pieces of rails are enclosed-arc-welde...  
JP2008275077
To provide a shaft for a continuously variable transmission (CVT) and its manufacturing method, excellent in dimensional accuracy and durability and achieving improved productivity and reduced cost by integrally fixing a shaft formed by ...  
JP2008274745
To provide a method of manufacturing a long welded rail which is improved in fatigue strength at a weld zone compared with a conventional long welded rail.The method is provided for manufacturing the long welded rail by thermite-welding ...  
JP2008267403
To provide a long-life rolling device hardly causing damage of a raceway surface.At least one of the raceway surface 1a of the inner ring 1 of a conical rolling bearing and the raceway surface 2a of the outer ring 2 thereof is finished b...  
JP2008264993
To provide a device and a method for improving the surface finish and completeness of a work.The method and the device improve the surface finish and/or surface completeness of the work molded or shaped by a tool 12 to increase the surfa...  
JP2008261037
To provide a carburized component or a carbonitrided component made of steel and subjected to shot peening which has satisfactory facial fatigue strength and can response to requests for lightening, miniaturization and high stress loadin...  
JP2008260064
To enlarge the wear resistance of a hole and the other machined feature parts and also to further extend especially when those feature parts are equivalent to the limiting portion of the life of components.This method includes: a step wh...  
JP2008255470
To improve both of tooth flank strength and low cycle fatigue strength of the root of tooth, which are required for deferential gear (a carburized component).The carburized component comprises 0.10 to less than 0.30% C, 0.10% or less Si,...  
JP2008255398
To provide a steel for high-speed cold working which exhibits excellent cold workability during working and good hardness after being worked.The steel for high-speed cold working is characterized in that: it has a composition consisting ...  
JP2008246638
To efficiently carry out surface treatment of a constricting part on an element for a CVT belt with a cavitation jet.This method treats a surface of the element 1 for the CVT belt aligned by a neck part 6 extending in the vertical direct...  
JP2008248321
To provide a recovery method of resistance to twist-induced breaking of a high strength ultra-fine steel wire, the method being characterized in that the high strength ultra-fine steel wire having 3.0 wire-drawing stress after being pate...  
JP2008238260
To provide a laser surface modification apparatus that prevents attenuation of a laser beam caused by particles or the like in a transparent liquid, then, prevents deterioration in processing performance of a laser beam.The laser surface...  
JP2008238258
To provide an iron-based member excellent in inserting onto a light-metal alloy with which in the case of inserting the iron-based member onto the light-metal alloy, the generation of cracking can be prevented.In the iron-based member us...  
JP2008223071
To provide a surface treatment method for stainless steel where, though stainless, particularly, sulfur based free-cutting stainless steel such as SUS303 and SUS430 having a high sulfur content is used for securing its free-cutting, the ...  
JP2008223122
To provide a method for strengthening an alloy steel for hot-working die, preventing the generation of a heat-fatigue crack.The alloy steel for hot-working die (e.g. SKD61 steel) using a steel containing 0.32-0.42% C, 0.80-1.20% Si, 0.50...  
JP2008213038
To provide a press forging method which can impart the tensile strength, ductility, impact resistance and toughness at a certain or higher level to a steel product by eliminating porosities when a steel ingot is used as a raw material in...  
JP2008214725
To suppress the elution of sulfur contained when the surface of the stainless steel is worked, though stainless steel, particularly, sulfur based free-cutting stainless steel such as SUS303 and SUS430 having a high sulfur content for sec...  
JP2008178888
To provide a method in which a residual compressive stress is sufficiently large around the surface of a workpiece and in which the distribution region of the residual compressive stress is formed thickly on the surface of the workpiece,...  
JP2008169455
To provide a method different from a conventional method for improving fatigue strength, that is, a new working method for improving the fatigue strength by bending.The method for improving the strength of a member is provided for improv...  
JP2008163414
To provide a rolling member in which precipitation of coarse cementite along a grain boundary is restrained, and a manufacturing method for the same.This rolling member is composed of a steel material containing at least 0.1-0.35 wt.% C ...  
JP2008163951
To provide a method of reducing crack propagation in an airfoil part 22.This method includes steps of: preparing an airfoil part 22 having a root 36 spaced apart from a tip 34, spaced-apart leading and trailing edges 30 and 32, a negativ...  
JP2008156673
To provide a machine component such as a gear to be used after having been carburized, which has both an advantage of having been surface-hardened by carburization and an advantage of having been surface-strengthened by a shot-peening te...  
JP2008151235
To provide a rolling device which hardly causes damage to a raceway surface and enables a long service life.Raceway surfaces 1a, 2a of a ball bearing are subjected to superfinishing and two types of shot peening. The shot peening in whic...  
JP2008138262
To provide a method for forming a shot-peening working surface with which the shot-peening worked surface can be formed on the surface of roll device component without bringing about increases in the cost of a base stock cost and in a wo...  
JP2008133519
To form a reforming layer to a desired depth from the surface of a steel material and to simply perform this formation at a low cost.A rotating tool T rotating at high speed is brought into contact with the surface of the steel material ...  
JP2008106365
To provide a spring having a high durability in actual use and sagging resistance of the same level as or higher than conventional ones through improvement of the corrosion fatigue resistance.The spring uses as a material a steel includi...  
JP2008095188
To provide a vacuum-carburized component, suitable to the confirmation of the performance to the vacuum-carburization or a processing thereafter, a manufacturing method thereof, and a heat-treatment oil composition used for the method.In...  
JP2008087029
To provide a laser peaning apparatus which can prevent the corrosion and contamination due to the liquid for enclosing plasma, and can prevent the large quantity consumption of the liquid, and does not require a large device such as a wa...  
JP2008081821
To obtain a hardening-treatment method, in which an ultra-hardened layer which is hardened to the maximum H880 in Shore hardness can be formed for a high carbon steel material.A fine pearlitic metallic structure generated with the harden...  
JP2008082377
To elongate durability of a rolling device by suppressing increase of surface roughness and applying compression residual stress to a rolling element raceway surface applied with surface finishing.The rolling device 1 is provided with an...  
JP2008069428
To improve the durability and wear resistance of a die molding face formed with a surface layer obtained by using a carbon-solid-soluted iron material in which carbon is solid-soluted in a supersaturated state.The surface layer is formed...  
JP2008069938
To provide a gear wherein the lubricating performance of the tooth face is improved to prevent peel-off or seizure damage to the tooth face, and to provide a gearing assembly.The gear has the tooth face 1 in which micro oil pools 5 are p...  
JP2008057017
To provide a carburized component or a carbo-nitrided component made of steel having satisfactory facial fatigue strength.In the carburized component or carbo-nitrided component made of steel, the maximum height roughness Rz of a roughne...  
JP2008055310
To provide a supporting body for a hydrogen-permeable membrane for use in a fuel cell etc. and to provide a method for manufacturing a hydrogen-permeable membrane member.In the method for manufacturing a supporting body for a hydrogen-pe...  
JP2008051182
To provide a clutch release bearing device for achieving abnormal noise prevention and life improvement.The clutch release bearing device 3 comprises a clutch release bearing 10 including an inner ring 11 and an outer ring 12, and balls ...  
JP2008049367
To provide a laser peening method and an apparatus that can improve stress upto approximately 1 mm depth from the surface of a workpiece in a short time.In the laser peening method, the workpiece 3 is irradiated in the surface continuous...  
JP2008051181
To provide a clutch release bearing device for achieving abnormal noise prevention and life improvement.The clutch release bearing device 3 comprises a clutch release bearing 10 including an inner ring 11 and an outer ring 12, a guide sl...  
JP2008038222
To provide a method and an apparatus for stably improving a fatigue strength in a metallic material by which efficiency of higher fatigue strength than that of the conventional treating method can be obtained.An ultrasonic impact treatme...  

Matches 601 - 650 out of 2,166