Patents by Inventor Hideharu Moro
Hideharu Moro 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).
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Publication number: 20080100410Abstract: A soft magnetic alloy powder containing Fe—Ni-based crystal particles is provided as one capable of adequately reducing core loss of a powder magnetic core and achieving satisfactory magnetic characteristics at an effective operating temperature of an element. The present invention provides a soft magnetic alloy powder containing Fe—Ni-based crystal particles containing 45 to 55 mass % Fe and 45 to 55 mass % Ni, relative to a total mass of Fe and Ni, and containing 1 to 12 mass % Co and 1.2 to 6.5 mass % Si, relative to a total mass of Fe, Ni, Co, and Si.Type: ApplicationFiled: October 19, 2007Publication date: May 1, 2008Applicant: TDK CORPORATIONInventors: Hiroshi Tomita, Hideharu Moro, Kesaharu Takatoh, Koyu Enda
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Patent number: 7235208Abstract: A dust core consists essentially of ferromagnetic powder; and an insulating binder, in which the ferromagnetic powder is dispersed; wherein the insulating binder is a silicone resin comprising a trifunctional alkyl-phenyl silicone resin and optionally containing an inorganic insulator such as an inorganic oxide, carbide or nitride. Preferably the alkyl-phenyl silicone resin is a methyl-phenyl silicone resin and comprises about 20 to 70 mol % of trifunctional groups. The dust core can be produced by pressure-molding a ferromagnetic powder, a lubricant and a trifunctional alkyl-phenyl silicone resin binder and heat treating the molded core at a temperature in the range of about 300 to about 800° C. for a time period in the range of about 20 minutes to about 2 hours in a non-oxidizing atmosphere. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength.Type: GrantFiled: January 26, 2005Date of Patent: June 26, 2007Assignee: Okuyama International Patent OfficeInventor: Hideharu Moro
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Publication number: 20050219027Abstract: It is an object to provide a method for manufacturing a coil-embedded dust core with a small variation in inductance value with efficiency and the like. A step (a) of charging soft magnetic metal powder including an insulating material, composing a green body 10, so as to cover a coil 1, and a step (b) of compacting the soft magnetic metal powder covering the coil 1 in an axial direction of the coil 1 are included, and in the step (b), the soft magnetic metal powder is compacted while an amount of the soft metal powder charged into the part corresponding to the winding section is kept smaller than an amount of the soft magnetic metal powder charged into the other part that are not corresponding to the winding section, with an upper surface or a lower surface of the winding section as a reference.Type: ApplicationFiled: May 26, 2005Publication date: October 6, 2005Inventors: Sadaki Satoh, Junetsu Tamura, Hideharu Moro, Tsuneo Suzuki
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Publication number: 20050203234Abstract: A dust core consists essentially of ferromagnetic powder; and an insulating binder, in which the ferromagnetic powder is dispersed; wherein the insulating binder is a silicone resin comprising a trifunctional alkyl-phenyl silicone resin and optionally containing an inorganic insulator such as an inorganic oxide, carbide or nitride. Preferably the alkyl-phenyl silicone resin is a methyl-phenyl silicone resin and comprises about 20 to 70 mol % of trifunctional groups. The dust core can be produced by pressure-molding a ferromagnetic powder, a lubricant and a trifunctional alkyl-phenyl silicone resin binder and heat treating the molded core at a temperature in the range of about 300 to about 800° C. for a time period in the range of about 20 minutes to about 2 hours in a non-oxidizing atmosphere. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength.Type: ApplicationFiled: January 26, 2005Publication date: September 15, 2005Inventor: Hideharu Moro
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Patent number: 6940387Abstract: A coil-embedded dust core and a method for manufacturing the coil-embedded dust core are provided. The coil-embedded dust core comprises a coil formed from a flat conductor wound in a coil configuration, and a green body consisting of insulating material-coated ferromagnetic metal particles. This results in a coil-embedded dust core more compact in size but with larger inductance. A rectangular wire can be used as the flat conductor. In addition, parts of the coil may function as terminal sections. In this case, the terminal sections of the coil may be formed wider than other part of the coil. The coil-embedded dust core is less prone to joint failures between a coil and terminal sections and to insulation failures of the coil and the terminal section with respect to the magnetic powder. The coil-embedded dust core is more compact while achieving larger inductance.Type: GrantFiled: April 2, 2004Date of Patent: September 6, 2005Assignee: TDK CorporationInventors: Kazuhiko Shibata, Takashi Nagasaka, Junetsu Tamura, Yasuhiko Kitajima, Hideharu Moro, Tsutomu Chou, Tsuneo Suzuki
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Patent number: 6940388Abstract: A dust core consists essentially of ferromagnetic powder; and an insulating binder, in which the ferromagnetic powder is dispersed; wherein the insulating binder is a silicone resin comprising a trifunctional alkyl-phenyl silicone resin and optionally containing an inorganic insulator such as an inorganic oxide, carbide or nitride. Preferably the alkyl-phenyl silicone resin is a methyl-phenyl silicone resin and comprises about 20 to 70 mol % of trifunctional groups. The dust core can be produced by pressure-molding a ferromagnetic powder, a lubricant and a trifunctional alkyl-phenyl silicone resin binder and heat treating the molded core at a temperature in the range of about 300 to about 800 ° C. for a time period in the range of about 20 minutes to about 2 hours in a non-oxidizing atmosphere. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength.Type: GrantFiled: April 11, 2003Date of Patent: September 6, 2005Assignee: TDK CorporationInventor: Hideharu Moro
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Patent number: 6882261Abstract: There are provided a coil-embedded dust core that provides high inductance and a method for manufacturing the same. The coil-embedded dust core includes a coil 1 formed by winding a flat conductor 2 and a green body 10 comprising of ferromagnetic metal powder coated with an insulating material. The coil 1 is composed of a winding section 3 in which the flat conductor 2 having front and back surfaces opposed to each other with a predetermined distance is wound and lead-out end sections 4a and 4b that are extended from the winding section 3. Either one of the front and back surfaces of the lead-out end section 4a and either one of the front and back surfaces of the lead-out end section 4b are formed so as to be on the same plane. By using the coil 1 in which the both end sections (lead-out end sections 4a and 4b) are formed on the same plane, the coil-embedded dust core can be made smaller in size, and high inductance can be provided.Type: GrantFiled: January 24, 2003Date of Patent: April 19, 2005Assignee: TDK CorporationInventors: Hideharu Moro, Tsuneo Suzuki
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Publication number: 20050030143Abstract: It is an object to provide a method for manufacturing a coil-embedded dust core with a small variation in inductance value with efficiency and the like. A step (a) of charging soft magnetic metal powder including an insulating material, composing a green body 10, so as to cover a coil 1, and a step (b) of compacting the soft magnetic metal powder covering the coil 1 in an axial direction of the coil 1 are included, and in the step (b), the soft magnetic metal powder is compacted while an amount of the soft metal powder charged into the part corresponding to the winding section is kept smaller than an amount of the soft magnetic metal powder charged into the other part that are not corresponding to the winding section, with an upper surface or a lower surface of the winding section as a reference.Type: ApplicationFiled: March 19, 2003Publication date: February 10, 2005Inventors: Sadaki Satoh, Junetsu Tamura, Hideharu Moro, Tsuneo Suzuki
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Publication number: 20040189431Abstract: A coil-embedded dust core and a method for manufacturing the coil-embedded dust core are provided. The coil-embedded dust core comprises a coil formed from a flat conductor wound in a coil configuration, and a green body consisting of insulating material-coated ferromagnetic metal particles. This results in a coil-embedded dust core more compact in size but with larger inductance. A rectangular wire can be used as the flat conductor. In addition, parts of the coil may function as terminal sections. In this case, the terminal sections of the coil may be formed wider than other part of the coil. The coil-embedded dust core is less prone to joint failures between a coil and terminal sections and to insulation failures of the coil and the terminal section with respect to the magnetic powder. The coil-embedded dust core is more compact while achieving larger inductance.Type: ApplicationFiled: April 2, 2004Publication date: September 30, 2004Applicant: TDK CorporationInventors: Kazuhiko Shibata, Takashi Nagasaka, Junetsu Tamura, Yasuhiko Kitajima, Hideharu Moro, Tsutomu Chou, Tsuneo Suzuki
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Patent number: 6791445Abstract: A coil-embedded dust core and a method for manufacturing the coil-embedded dust core are provided. The coil-embedded dust core comprises a coil formed from a flat conductor wound in a coil configuration, and a green body consisting of insulating material-coated ferromagnetic metal particles. This results in a coil-embedded dust core more compact in size but with larger inductance. A rectangular wire can be used as the flat conductor. In addition, parts of the coil may function as terminal sections. In this case, the terminal sections of the coil may be formed wider than other part of the coil. The coil-embedded dust core is less prone to joint failures between a coil and terminal sections and to insulation failures of the coil and the terminal section with respect to the magnetic powder. The coil-embedded dust core is more compact while achieving larger inductance.Type: GrantFiled: February 19, 2002Date of Patent: September 14, 2004Assignee: TDK CorporationInventors: Kazuhiko Shibata, Takashi Nagasaka, Junetsu Tamura, Yasuhiko Kitajima, Hideharu Moro, Tsutomu Chou, Tsuneo Suzuki
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Publication number: 20040174239Abstract: A coil-embedded dust core and a method for manufacturing the coil-embedded dust core are provided. The coil-embedded dust core comprises a coil formed from a flat conductor wound in a coil configuration, and a green body consisting of insulating material-coated ferromagnetic metal particles. This results in a coil-embedded dust core more compact in size but with larger inductance. A rectangular wire can be used as the flat conductor. In addition, parts of the coil may function as terminal sections. In this case, the terminal sections of the coil may be formed wider than other part of the coil. The coil-embedded dust core is less prone to joint failures between a coil and terminal sections and to insulation failures of the coil and the terminal section with respect to the magnetic powder. The coil-embedded dust core is more compact while achieving larger inductance.Type: ApplicationFiled: March 19, 2004Publication date: September 9, 2004Applicant: TDK CORPORATIONInventors: Kazuhiko Shibata, Takashi Nagasaka, Junetsu Tamura, Yasuhiko Kitajima, Hideharu Moro, Tsutomu Chou, Tsuneo Suzuki
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Patent number: 6759935Abstract: The invention provides a process for producing a coil-embedded dust core by embedding a coil in magnetic powders comprising ferromagnetic metal particles coated with an insulating material. At the first compression molding step one portion of magnetic powders is filled in a molding die and then compression molded to form a lower core. At a coil positioning step the coil is positioned on the upper surface of the lower core in the molding die. At a coil embedding step another portion of magnetic powders is again filled in the molding die in such a way that the coil is embedded in these magnetic powders. At the second compression molding step pressure is applied to the lower core and coil in the direction of lamination thereof.Type: GrantFiled: January 5, 2001Date of Patent: July 6, 2004Assignee: TDK CorporationInventors: Hideharu Moro, Tsuneo Suzuki, Tsutomu Chou, Jyunetsu Tamura, Sadaki Sato
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Publication number: 20030214379Abstract: A method of real time ultrasound imaging of an object in at least three two-dimensional scan planes that are rotated around a common axis, is given, together with designs of ultrasound transducer arrays that allows for such imaging. The method is also introduced into a monitoring situation of cardiac function where, combined with other measurements as for example the LV pressure, physiological parameters like ejection fraction and muscular fiber stress is calculated.Type: ApplicationFiled: March 19, 2003Publication date: November 20, 2003Applicant: TDK CORPORATIONInventors: Sadaki Satoh, Junetsu Tamura, Hideharu Moro, Tsuneo Suzuki
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Publication number: 20030206090Abstract: A dust core consists essentially of ferromagnetic powder; and an insulating binder, in which the ferromagnetic powder is dispersed; wherein the insulating binder is a silicone resin comprising a trifunctional alkyl-phenyl silicone resin and optionally containing an inorganic insulator such as an inorganic oxide, carbide or nitride. Preferably the alkyl-phenyl silicone resin is a methyl-phenyl silicone resin and comprises about 20 to 70 mol % of trifunctional groups. The dust core can be produced by pressure-molding a ferromagnetic powder, a lubricant and a trifunctional alkyl-phenyl silicone resin binder and heat treating the molded core at a temperature in the range of about 300 to about 800 ° C. for a time period in the range of about 20 minutes to about 2 hours in a non-oxidizing atmosphere. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength.Type: ApplicationFiled: April 11, 2003Publication date: November 6, 2003Applicant: TDK CorporationInventor: Hideharu Moro
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Publication number: 20030141952Abstract: There are provided a coil-embedded dust core that provides high inductance and a method for manufacturing the same. The coil-embedded dust core includes a coil 1 formed by winding a flat conductor 2 and a green body 10 comprising of ferromagnetic metal powder coated with an insulating material. The coil 1 is composed of a winding section 3 in which the flat conductor 2 having front and back surfaces opposed to each other with a predetermined distance is wound and lead-out end sections 4a and 4b that are extended from the winding section 3. Either one of the front and back surfaces of the lead-out end section 4a and either one of the front and back surfaces of the lead-out end section 4b are formed so as to be on the same plane. By using the coil 1 in which the both end sections (lead-out end sections 4a and 4b) are formed on the same plane, the coil-embedded dust core can be made smaller in size, and high inductance can be provided.Type: ApplicationFiled: January 24, 2003Publication date: July 31, 2003Applicant: TDK CORPORATIONInventors: Hideharu Moro, Tsuneo Suzuki
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Patent number: 6527823Abstract: To provide a powder for dust cores capable of improving magnetic properties such as magnetic permeability in a molded compacted powder magnetic core and mechanical properties such as size precision of the molded compacted powder magnetic core and radial crushing strength and, a dust core using the powder. A powder for a dust core contains a ferromagnetic powder, an insulating material containing silicone resin and/or phenol resin, and a lubricant, wherein the lubricant contains aluminum stearate, and a dust core using the powder for a dust core.Type: GrantFiled: June 26, 2001Date of Patent: March 4, 2003Assignee: TDK CorporationInventor: Hideharu Moro
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Publication number: 20020158739Abstract: A coil-embedded dust core and a method for manufacturing the coil-embedded dust core are provided. The coil-embedded dust core comprises a coil formed from a flat conductor wound in a coil configuration, and a green body consisting of insulating material-coated ferromagnetic metal particles. This results in a coil-embedded dust core more compact in size but with larger inductance. A rectangular wire can be used as the flat conductor. In addition, parts of the coil may function as terminal sections. In this case, the terminal sections of the coil may be formed wider than other part of the coil. The coil-embedded dust core is less prone to joint failures between a coil and terminal sections and to insulation failures of the coil and the terminal section with respect to the magnetic powder. The coil-embedded dust core is more compact while achieving larger inductance.Type: ApplicationFiled: February 19, 2002Publication date: October 31, 2002Applicant: TDK CORPORATIONInventors: Kazuhiko Shibata, Takashi Nagasaka, Junetsu Tamura, Yasuhiko Kitajima, Hideharu Moro, Tsutomu Chou, Tsuneo Suzuki
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Publication number: 20020084882Abstract: A dust core is produced by pressure-molding at least a ferromagnetic powder and an insulating material. The dust core has high magnetic permeability representing the direct current superimposition characteristics, has reduced core loss and has increased mechanical strength. The insulating material comprises a methyl-phenyl silicone resin, wherein the amount of a trifunctional methyl-phenyl silicone resin contained in the methyl-phenyl silicone resin is in a range from 20 to 70 mol % of all silicone resins.Type: ApplicationFiled: May 30, 2001Publication date: July 4, 2002Inventor: Hideharu Moro
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Publication number: 20020014280Abstract: To provide a powder for dust cores capable of improving magnetic properties such as magnetic permeability in a molded compacted powder magnetic core and mechanical properties such as size precision of the molded compacted powder magnetic core and radial crushing strength and, a dust core using the powder. A powder for a dust core contains a ferromagnetic powder, an insulating material containing silicone resin and/or phenol resin, and a lubricant, wherein the lubricant contains aluminum stearate, and a dust core using the powder for a dust core.Type: ApplicationFiled: June 26, 2001Publication date: February 7, 2002Inventor: Hideharu Moro
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Publication number: 20010016977Abstract: The invention provides a process for producing a coil-embedded dust core by embedding a coil in magnetic powders comprising ferromagnetic metal particles coated with an insulating material. At the first compression molding step one portion of magnetic powders is filled in a molding die and then compression molded to form a lower core. At a coil positioning step the coil is positioned on the upper surface of the lower core in the molding die. At a coil embedding step another portion of magnetic powders is again filled in the molding die in such a way that the coil is embedded in these magnetic powders. At the second compression molding step pressure is applied to the lower core and coil in the direction of lamination thereof.Type: ApplicationFiled: January 5, 2001Publication date: August 30, 2001Applicant: TDK CORPORATIONInventors: Hideharu Moro, Tsuneo Suzuki, Tsutomu Chou, Jyunetsu Tamura, Sadaki Sato