Patents by Inventor Kazuhisa Fujisawa
Kazuhisa Fujisawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9511511Abstract: Provided is a resin-coated saw wire that, when used to cut a workpiece, has a shallow depth of a damaged layer and can give a cut article having a smooth surface. The resin-coated saw wire is used in cutting of the workpiece using a sawing machine and includes a steel wire and a resin coating covering the steel wire surface. The resin coating contains substantially no abrasive grain, has a hardness at 120° C. of 0.07 GPa or more, and has a hardness controlled so as to prevent abrasive grains from coming into the resin coating, which abrasive grains are sprayed during workpiece cutting.Type: GrantFiled: August 17, 2012Date of Patent: December 6, 2016Assignee: KOBELCO RESEARCH INSTITUTE, INC.Inventors: Kazuo Yoshikawa, Hiroshi Yaguchi, Kazuhisa Fujisawa, Masanori Anan, Akinori Uratsuka, Yoshitake Matsushima
-
Publication number: 20140165988Abstract: Provided is a resin-coated saw wire that, when used to cut a workpiece, has a shallow depth of a damaged layer and can give a cut article having a smooth surface. The resin-coated saw wire is used in cutting of the workpiece using a sawing machine and includes a steel wire and a resin coating covering the steel wire surface. The resin coating contains substantially no abrasive grain, has a hardness at 120° C. of 0.07 GPa or more, and has a hardness controlled so as to prevent abrasive grains from coming into the resin coating, which abrasive grains are sprayed during workpiece cutting.Type: ApplicationFiled: August 17, 2012Publication date: June 19, 2014Applicant: KOBELCO RESEARCH INSTITUTE, INC.Inventors: Kazuo Yoshikawa, Hiroshi Yaguchi, Kazuhisa Fujisawa, Masanori Anan, Akinori Uratsuka, Yoshitake Matsushima
-
Patent number: 7789934Abstract: A lubricant for powder metallurgy which includes a polyhydroxycarboxylic acid amide. The lubricant improves both flowability and lubricity, irrespective of a presence or absence of any complicated pretreatment step.Type: GrantFiled: January 19, 2005Date of Patent: September 7, 2010Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Hironori Suzuki, Kazuhisa Fujisawa, Takayasu Fujiura, Kiyoshi Horie, Masaki Kojima, Takeshi Yoshihara
-
Patent number: 7618711Abstract: A resin coated metal plate having excellent formability comprises, on a metal plate, a resin coating layer containing a conductive filler and a corrosion inhibitor, a matrix resin constituting the resin coating layer is made mainly of a flexible epoxy resin and has a modulus of elasticity of not less than 3 GPa. When secondarily cured, the resin coated metal plate is imparted with excellent weldability and corrosion resistance.Type: GrantFiled: February 17, 2005Date of Patent: November 17, 2009Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Hironobu Nakanishi, Kazuhisa Fujisawa, Hiroo Shige, Masatoshi Iwai
-
Patent number: 7419295Abstract: An extruder includes a barrel and a kneading screw extending through the barrel in a rotatable fashion. The kneading screw is provided with a devolatilization portion. The devolatilization portion includes a kneading flight that is twisted in a direction for transferring a material downstream. The kneading flight kneads the material while transferring the material downstream and separates a volatile component from the material. Impregnation sections, which allow the kneading chamber to be impregnated with the material, are respectively disposed adjacent to an upstream side and a downstream side of the devolatilization portion so that the air-tightness of the devolatilization portion of the extruder is maintained. Accordingly, an efficient devolatilization operation of the material is achieved.Type: GrantFiled: June 10, 2005Date of Patent: September 2, 2008Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kimio Inoue, Shigehiro Kasai, Hideo Funahashi, Kazuhisa Fujisawa, Hironobu Nakanishi
-
Publication number: 20080187743Abstract: A resin-coated metal sheet having a metal sheet and a resin layer containing electroconductive particles provided on the surface of the metal sheet is characterized in that t (?m), r (?m), d84 (?m) and d16 (?m) satisfy the following expressions 2.0?t?16, 0.25t?r?2t, and SD=(d84-d16)/2?0.8r, wherein t represents the film thickness (?m) of the resin layer, r represents a volume average particle diameter (?m) of the electroconductive v articles, and d84 and d16 represent the particle diameters (?m) at cumulative percentages of 84% and 16%, respectively in the cumulative particle diameter distribution of the electroconductive particles.Type: ApplicationFiled: July 7, 2005Publication date: August 7, 2008Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)Inventors: Hiroo Shige, Masatoshi Iwai, Kazuhisa Fujisawa, Hironobu Nakanishi
-
Publication number: 20080118766Abstract: A mixed powder for powder metallurgy to be used as a feedstock of a green compact includes an iron powder and/or an iron alloy powder, a component for improving mechanical properties, and a thermosetting resin powder. In the mixed powder, the thermosetting resin powder is composed of at least one resin selected from the group consisting of an epoxy-polyester-based resin, an epoxy-based resin, and an acrylic-based resin. In addition, the average particle diameter of the thermosetting resin powder is 100 ?m or less, and the content of the thermosetting resin powder relative to the total amount of the iron powder and/or the iron alloy powder is 0.05 to 1.0 mass percent.Type: ApplicationFiled: January 16, 2008Publication date: May 22, 2008Applicant: Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel, Ltd.)Inventors: Kazuhisa FUJISAWA, Takayasu FUJIURA, Hironori SUZUKI
-
Publication number: 20070154340Abstract: A lubricant for powder metallurgy which includes a polyhydroxycarboxylic acid amide. The lubricant improves both flowability and lubricity, irrespective of a presence or absence of any complicated pretreatment step.Type: ApplicationFiled: January 19, 2005Publication date: July 5, 2007Applicants: Kabushiki Kaisha Kobe Seiko Sho, Nippon Fine Chemical Co., Ltd.Inventors: Hironori Suzuki, Kazuhisa Fujisawa, Takayasu Fujiura, Kiyoshi Horie, Masaki Kojima, Takeshi Yoshihara
-
Patent number: 7163046Abstract: The apparatus of the invention is an injection molding apparatus of a type adapted to cool a molten metal under shearing by an extrusion screw in a substantially vertical chamber into a semi-solidified slurry and then inject the semi-solidified slurry discharged from a discharge port at the lower end of a channel into molding plates, in which a clamping device is adapted to open or close a movable plate relative to a stationary plate in the horizontal direction, and a connection member having, at the inside, a vertical first channel and a second channel extending in the horizontal direction from the lower end of the first channel and in communication with the stationary plate is connected to the discharge port at the lower end of the chamber. Since this can inject and mold light metal molding products of high quality with less pore or shrinkage without excessively enlarging the size for the height of the apparatus, casting products of high quality can be obtained at a reduced cost by injection molding.Type: GrantFiled: August 10, 2004Date of Patent: January 16, 2007Assignee: Kobe Steel, Ltd.Inventors: Tatsuya Tanaka, Munenori Soejima, Katsunori Takahashi, Takeshi Kanda, Kazuhisa Fujisawa
-
Patent number: 7074254Abstract: The invention aims to provide a binder for powder metallurgy, the binder containing an epoxy resin which is liquid at room temperature and a curing agent having at least one functional group selected from the group consisting of amino, mercapto and carboxyl groups. The binder involves few problems in point of workability and safety, suppress the scattering of graphite, and is superior in powder characteristics. The invention also provides a mixed powder for powder metallurgy using the binder and a method for producing the mixed powder.Type: GrantFiled: February 23, 2004Date of Patent: July 11, 2006Assignee: Kobe Steel Ltd.Inventors: Kazuhisa Fujisawa, Hironori Suzuki
-
Publication number: 20060090594Abstract: A mixed powder for powder metallurgy to be used as a feedstock of a green compact includes an iron powder and/or an iron alloy powder, a component for improving mechanical properties, and a thermosetting resin powder. In the mixed powder, the thermosetting resin powder is composed of at least one resin selected from the group consisting of an epoxy-polyester-based resin, an epoxy-based resin, and an acrylic-based resin. In addition, the average particle diameter of the thermosetting resin powder is 100 ?m or less, and the content of the thermosetting resin powder relative to the total amount of the iron powder and/or the iron alloy powder is 0.05 to 1.0 mass percent.Type: ApplicationFiled: September 12, 2005Publication date: May 4, 2006Applicant: Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel, Ltd.)Inventors: Kazuhisa Fujisawa, Takayasu Fujiura, Hironori Suzuki
-
Patent number: 7033678Abstract: A resin coated metal sheet of the invention has an epoxy resin layer on a galvanized metal sheet, wherein the resin layer contains iron phosphide and at least one selected from the group consisting of aluminum triphosphate, calcium ion exchange silica and amorphous magnesium silicate compound. In the resin coated metal sheet, the epoxy resin is an urethane modified epoxy resin and/or dimer acid modified epoxy resin, and the iron phosphide has a maximum particle diameter of 15 ?m or less. The resin coated metal sheet has excellent weldability, formability and corrosion resistance.Type: GrantFiled: April 26, 2004Date of Patent: April 25, 2006Assignee: Kobe Steel, Ltd.Inventors: Hironobu Nakanishi, Kazuhisa Fujisawa, Hiroo Shige, Masatoshi Iwai
-
Publication number: 20060003042Abstract: An extruder includes a barrel and a kneading screw extending through the barrel in a rotatable fashion. The kneading screw is provided with a devolatilization portion. The devolatilization portion includes a kneading flight that is twisted in a direction for transferring a material downstream. The kneading flight kneads the material while transferring the material downstream and separates a volatile component from the material. Impregnation sections, which allow the kneading chamber to be impregnated with the material, are respectively disposed adjacent to an upstream side and a downstream side of the devolatilization portion so that the air-tightness of the devolatilization portion of the extruder is maintained. Accordingly, an efficient devolatilization operation of the material is achieved.Type: ApplicationFiled: June 10, 2005Publication date: January 5, 2006Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kimio Inoue, Shigehiro Kasai, Hideo Funahashi, Kazuhisa Fujisawa, Hironobu Nakanishi
-
Publication number: 20050181216Abstract: A resin coated metal plate having excellent formability comprises, on a metal plate, a resin coating layer containing a conductive filler and a corrosion inhibitor, a matrix resin constituting the resin coating layer is made mainly of a flexible epoxy resin and has a modulus of elasticity of not less than 3 GPa. When secondarily cured, the resin coated metal plate is imparted with excellent weldability and corrosion resistance.Type: ApplicationFiled: February 17, 2005Publication date: August 18, 2005Inventors: Hironobu Nakanishi, Kazuhisa Fujisawa, Hiroo Shige, Masatoshi Iwai
-
Patent number: 6878432Abstract: A panel structure for a transport machine is disclosed which is constituted by an integral combination of an outer panel and an inner panel. The inner panel has reinforcing protuberances and recesses, possessing a higher rigidity than the outer panel. The protuberances of the inner panel and a back side of the outer panel are bonded together through insulating layers present on the protuberances.Type: GrantFiled: May 3, 2002Date of Patent: April 12, 2005Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Hiroki Ueda, Koji Fukumoto, Toshimitsu Tanaka, Akio Sugimoto, Akibumi Fujiwara, Kazuhisa Fujisawa
-
Publication number: 20050006046Abstract: The apparatus of the invention is an injection molding apparatus of a type adapted to cool a molten metal under shearing by an extrusion screw in a substantially vertical chamber into a semi-solidified slurry and then inject the semi-solidified slurry discharged from a discharge port at the lower end of a channel into molding plates, in which a clamping device is adapted to open or close a movable plate relative to a stationary plate in the horizontal direction, and a connection member having, at the inside, a vertical first channel and a second channel extending in the horizontal direction from the lower end of the first channel and in communication with the stationary plate is connected to the discharge port at the lower end of the chamber. Since this can inject and mold light metal molding products of high quality with less pore or shrinkage without excessively enlarging the size for the height of the apparatus, casting products of high quality can be obtained at a reduced cost by injection molding.Type: ApplicationFiled: August 10, 2004Publication date: January 13, 2005Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Tatsuya Tanaka, Munenori Soejima, Katsunori Takahashi, Takeshi Kanda, Kazuhisa Fujisawa
-
Patent number: 6840302Abstract: The apparatus of the invention is an injection molding apparatus of a type adapted to cool a molten metal under shearing by an extrusion screw in a substantially vertical chamber into a semi-solidified slurry and then inject the semi-solidified slurry discharged from a discharge port at the lower end of a channel into molding plates, in which a clamping device is adapted to open or close a movable plate relative to a stationary plate in the horizontal direction, and a connection member having, at the inside, a vertical first channel and a second channel extending in the horizontal direction from the lower end of the first channel and in communication with the stationary plate is connected to the discharge port at the lower end of the chamber. Since this can inject and mold light metal molding products of high quality with less pore or shrinkage without excessively enlarging the size for the height of the apparatus, casting products of high quality can be obtained at a reduced cost by injection molding.Type: GrantFiled: April 14, 2000Date of Patent: January 11, 2005Assignee: Kobe Steel, Ltd.Inventors: Tatsuya Tanaka, Munenori Soejima, Katsunori Takahashi, Takeshi Kanda, Kazuhisa Fujisawa
-
Patent number: 6824724Abstract: An object of the present invention is to provide a bladder which is unlikely to have a shapal variation along the inner wall surface of the tire and can satisfactorily extend along the inner wall surface of the tire. An inventive bladder is used to press the inner wall surface of the tire by a pressurized heating medium during the vulcanization of a green tire and is comprised of a fabric layer (purl stitched fabric layer 12) and rubber layers (silicone rubber layers 11, 13) placed one over another. Elongation rates of the fabric layer in warp direction and in weft direction both exceed 15% and satisfy: 0.4≦elongation rate in weft direction/elongation rate in warp direction ≦6.0. Since the fabric layer has good extensibility, it can elongate with the rubber layers.Type: GrantFiled: November 1, 2002Date of Patent: November 30, 2004Assignees: Teijin Limited, Kabushiki Kaisha Kobe Seiko ShoInventors: Hiroyuki Mori, Yozaburo Takayama, Kazuhisa Fujisawa, Hisashi Mitamura, Kazuto Okada, Naoya Fujiwara, Eiichiro Yoshikawa, Takayuki Kogishi
-
Publication number: 20040224170Abstract: A resin coated metal sheet of the invention has an epoxy resin layer on a galvanized metal sheet, wherein the resin layer contains iron phosphide and at least one selected from the group consisting of aluminum triphosphate, calcium ion exchange silica and amorphous magnesium silicate compound. In the resin coated metal sheet, the epoxy resin is an urethane modified epoxy resin and/or dimer acid modified epoxy resin, and the iron phosphide has a maximum particle diameter of 15 &mgr;m or less. The resin coated metal sheet has excellent weldability, formability and corrosion resistance.Type: ApplicationFiled: April 26, 2004Publication date: November 11, 2004Applicant: Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel, Ltd.)Inventors: Hironobu Nakanishi, Kazuhisa Fujisawa, Hiroo Shige, Masatoshi Iwai
-
Publication number: 20040168547Abstract: The invention aims to provide a binder for powder metallurgy, the binder containing an epoxy resin which is liquid at room temperature and a curing agent having at least one functional group selected from the group consisting of amino, mercapto and carboxyl groups. The binder involves few problems in point of workability and safety, suppress the scattering of graphite, and is superior in powder characteristics. The invention also provides a mixed powder for powder metallurgy using the binder and a method for producing the mixed powder.Type: ApplicationFiled: February 23, 2004Publication date: September 2, 2004Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kazuhisa Fujisawa, Hironori Suzuki