Patents by Inventor Tomoyuki Ueno
Tomoyuki Ueno 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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Patent number: 11919081Abstract: A method of making a sintered part includes a step of applying a machining process to a compacted part with a tool to make a machined compacted part having a cogwheel shape, and a step of sintering the machined compacted part to make a sintered part, wherein the machining process is such that a surface of the compacted part on a side where the tool exits is supported by a plate member having a tooth pattern with same specifications as a tooth pattern of the cogwheel shape, and the tool is used to machine portions of the compacted part corresponding to tooth spaces of the plate member.Type: GrantFiled: February 21, 2020Date of Patent: March 5, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Kazunari Shimauchi, Tomoyuki Ueno, Tomoyuki Ishimine
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Patent number: 11923726Abstract: This stator core is a stator core for a rotating electric machine of an axial gap type and includes a body portion formed by a compaction-molded body of soft magnetic powder whose surfaces are coated with insulating films, wherein the body portion is provided with one or a plurality of through holes.Type: GrantFiled: September 5, 2019Date of Patent: March 5, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Yuuichi Nakamura, Tomoyuki Ueno, Tatsuya Saito
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Patent number: 11901773Abstract: This axial gap motor includes: a stator; and a rotor provided so as to be opposed to the stator in an axial direction. The rotor includes an annular rotor yoke, and a plurality of magnets provided to contact one surface of the rotor yoke so as to be arranged at predetermined intervals along a circumferential direction with magnetic poles thereof being different alternately. The one surface includes a plurality of facing areas facing and contacting the plurality of magnets, and a non-facing area not facing the plurality of magnets. The non-facing area includes partial areas each located between a pair of the facing areas adjacent to each other in the circumferential direction among the plurality of facing areas. The partial areas are formed to be recesses recessed in the axial direction relative to the facing areas.Type: GrantFiled: September 5, 2019Date of Patent: February 13, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Yuuichi Nakamura, Tomoyuki Ueno, Tatsuya Saito
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Patent number: 11894720Abstract: A core used in an axial gap type rotating electrical machine includes an annular yoke having a plurality of through-holes disposed in a circumferential direction, and a plurality of columnar teeth disposed in the circumferential direction of the yoke, each of the plurality of columnar teeth including one end inserted into each of the plurality of through-holes. The yoke and each of the teeth are composed of a powder compact separate from each other, and the one end of each of the teeth is off-center in the through-hole.Type: GrantFiled: December 11, 2019Date of Patent: February 6, 2024Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tatsuya Saito, Yuichi Nakamura, Tomoyuki Ueno
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Patent number: 11888351Abstract: A core that is used in an axial-gap rotary electric machine and that includes a body, and frame-shaped flange portions. The body includes an annular yoke and columnar teeth that are arranged in a circumferential direction of the yoke. The flange portions are fixed to end portions of the respective teeth. The yoke and the teeth are composed of a single powder compact. Each of the flange portions is composed of a powder compact that has a through-hole. The end portion of each of the teeth is inserted in the through-hole, and an end surface of each of the teeth is exposed from the through-hole. A ratio of an area of the end surface of each of the teeth to an area within an outer circumferential edge of each of the flange portions is 7.5% or more in a plan view in an axial direction of the yoke.Type: GrantFiled: September 5, 2019Date of Patent: January 30, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Yuichi Nakamura, Tomoyuki Ueno
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Patent number: 11888347Abstract: A core for use in an axial-gap rotary electric machine is annular and includes a plurality of core pieces into which the core is divided in a circumferential direction. Each core piece includes a yoke portion and a tooth portion that is formed integrally with the yoke portion and that projects from the yoke portion in an axial direction. Each yoke portion includes a plurality of protrusions provided on one side surface connected to the yoke portion of an adjacent one of the core pieces, and a plurality of recesses provided on other side surface connected to the yoke portion of another adjacent one of the core pieces, the recesses corresponding to the protrusions. An interval between the protrusions is 80% or less of a length of the one side surface of the yoke portion, the length being a direct distance between inner and outer peripheries of the yoke portion.Type: GrantFiled: October 17, 2019Date of Patent: January 30, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Tomoyuki Ueno
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Patent number: 11869691Abstract: A powder magnetic core includes a compact including soft magnetic powder, and an insulating-resin coating that covers a portion of a surface of the compact. A ratio of an area of the insulating-resin coating to a surface area of the compact is lower than or equal to 85%, and a maximum depth of unevenness on a surface of the insulating-resin coating is smaller than or equal to 20 ?m.Type: GrantFiled: July 23, 2018Date of Patent: January 9, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Asako Watanabe, Tomoyuki Ueno
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Patent number: 11802617Abstract: A method of manufacturing a sintered gear includes preparing a green compact having two gear-shaped end surfaces, one on each of two sides in an axial direction of the green compact, and having a plurality of teeth on an outer peripheral surface formed between the two end surfaces; chamfering an edge of the teeth by a brush; and sintering the green compact. The brush is a wheel-type brush including a disk-shaped wheel and a bristle member radially protruding from an outer periphery of the wheel. The chamfering includes disposing the brush with respect to the green compact such that the axial direction of the green compact and an axial direction of the wheel intersect with each other; bringing a tip of the bristle member into contact with a tooth bottom edge; and relatively moving the brush in a circumferential direction of the green compact while rotating the brush.Type: GrantFiled: September 29, 2021Date of Patent: October 31, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Kazunari Shimauchi, Tomoyuki Ueno, Tomoyuki Ishimine
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Patent number: 11794244Abstract: A method for manufacturing a dust core, including: a step of preparing a raw material powder including a coated pure iron powder composed of a plurality of pure iron particles each having an insulating coating layer, a coated iron alloy powder composed of a plurality of iron alloy particles each having an insulating coating layer, and a metal soap; a step of manufacturing a molded article by performing a compression molding of the raw material powder filled in a mold; and a step of performing a heat treatment of the molded article to eliminate distortions in the coated pure iron powder and the coated iron alloy powder, wherein a difference Tm?Td between a melting point Tm of the metal soap and a temperature Td of the mold in the step of manufacturing the molded article is greater than or equal to 90° C.Type: GrantFiled: August 10, 2018Date of Patent: October 24, 2023Assignees: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Asako Watanabe, Tomoyuki Ueno, Hijiri Tsuruta
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Patent number: 11791672Abstract: A core for use in an axial gap rotating electric machine, the core including: a yoke having an annular plate shape; and a plurality of teeth having a columnar shape arranged at intervals in a circumferential direction of the yoke, wherein the yoke has: an outer-circumferential face; an inner-circumferential face; a first face having a flat shape connecting the outer-circumferential face and the inner-circumferential face to each other; and a plurality of recessed portions connected to the first face, each of the plurality of teeth has an outer-circumferential face protruding in an axial direction of the yoke with respect to the first face, each of the plurality of recessed portions are connected to at least a portion of each one of the plurality of teeth in a circumferential direction of the outer-circumferential face, all shortest distances between at least one of an outer-circumferential edge of the first face and an inner-circumferential edge of the first face and the outer-circumferential faces of the pluType: GrantFiled: December 13, 2019Date of Patent: October 17, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tatsuya Saito, Tomoyuki Ueno, Yuka Fukunaga, Hijiri Tsuruta, Shinichi Hirono
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Patent number: 11770034Abstract: A core is a core included in a rotor or a stator of an axial-gap rotating electrical machine, in which the core includes a block-shaped first member and a plate-shaped second member that are constituted by powder compacts; the first member includes a first surface that faces the second member, and a first coupling portion that is formed at the first surface; the second member includes a second surface that faces the first surface, and a second coupling portion that is formed at the second surface and that is coupled to the first coupling portion; one of the first coupling portion and the second coupling portion is constituted by a protrusion, and the other one is constituted by a recess having a shape corresponding to the protrusion.Type: GrantFiled: July 11, 2019Date of Patent: September 26, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Yuichi Nakamura, Tomoyuki Ueno, Hijiri Tsuruta, Shinichi Hirono
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Publication number: 20230287970Abstract: A method of manufacturing a sintered gear includes preparing a green compact having two gear-shaped end surfaces, one on each of two sides in an axial direction of the green compact, and having a plurality of teeth on an outer peripheral surface formed between the two end surfaces; chamfering an edge of the teeth by a brush; and sintering the green compact. The brush is a wheel-type brush including a disk-shaped wheel and a bristle member radially protruding from an outer periphery of the wheel. The chamfering includes disposing the brush with respect to the green compact such that the axial direction of the green compact and an axial direction of the wheel intersect with each other; bringing a tip of the bristle member into contact with a tooth bottom edge; and relatively moving the brush in a circumferential direction of the green compact while rotating the brush.Type: ApplicationFiled: September 29, 2021Publication date: September 14, 2023Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Kazunari SHIMAUCHI, Tomoyuki UENO, Tomoyuki ISHIMINE
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Patent number: 11718901Abstract: A method for producing a coated magnetic powder in which particle surfaces of a soft magnetic powder are coated with a silicone resin includes a preparation step of preparing a silicone emulsion by mixing a silicone resin with water containing a surfactant and dispersing the silicone resin in the water, an application step of applying the silicone emulsion onto particle surfaces of a soft magnetic powder, and a drying step of drying the soft magnetic powder after the silicone emulsion is applied.Type: GrantFiled: May 17, 2017Date of Patent: August 8, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Asako Watanabe, Tomoyuki Ueno
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Publication number: 20230143036Abstract: A core piece includes a first member in a column form and a second member in a plate form, the first member and the second member being configured by a green compact in which the first member and the second member are integrally formed, the green compact includes a plurality of soft magnetic particles having a flat shape, a first average aspect ratio of the soft magnetic particles is greater than or equal to 1.2 in a first cross section of the first member, a second average aspect ratio of the soft magnetic particles is greater than or equal to 1.2 in a second cross section of the second member, each of the first average aspect ratio and the second average aspect ratio is related to an average of lengths of soft magnetic particles in a direction of the stator core.Type: ApplicationFiled: March 31, 2021Publication date: May 11, 2023Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya SAITO, Tomoyuki UENO, Tomoyuki ISHIMINE
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Publication number: 20230134477Abstract: A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.Type: ApplicationFiled: December 27, 2022Publication date: May 4, 2023Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tatsuya SAITO, Tomoyuki UENO
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Patent number: 11636963Abstract: A method for manufacturing a powder magnetic core, including a step of compacting a raw material powder to form a compact, a step of performing a first heat treatment on the compact to obtain a first heat-treated body, and a step of performing a second heat treatment on the first heat-treated body to obtain a second heat-treated body, wherein the raw material powder contains a soft magnetic powder and a lubricant that has a melting point Tm, the first heat treatment is performed in a temperature range from Tm to Tm+50° C. inclusive for a time longer than 10 minutes, and the second heat treatment is performed in a temperature range from 400° C. to 900° C. inclusive for a time of 3 minutes to 90 minutes inclusive, the temperature range of the second heat treatment being higher than the temperature range of the first heat treatment.Type: GrantFiled: June 18, 2019Date of Patent: April 25, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Hijiri Tsuruta, Tomoyuki Ueno
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Patent number: 11591681Abstract: An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 ?m×226 ?m is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 ?m×45.2 ?m, the complex oxide particles have an average equivalent circle diameter of from 0.3 ?m to 2.5 ?m inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 ?m2/particle to 1,000 ?m2/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.Type: GrantFiled: August 30, 2016Date of Patent: February 28, 2023Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tomoyuki Ueno, Koji Yamada, Kazuya Takizawa, Yuki Adachi, Tetsuya Hayashi
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Patent number: 11581763Abstract: A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.Type: GrantFiled: March 31, 2021Date of Patent: February 14, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Tomoyuki Ueno
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Publication number: 20220352768Abstract: A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.Type: ApplicationFiled: March 31, 2021Publication date: November 3, 2022Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tatsuya SAITO, Tomoyuki UENO
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Publication number: 20220329115Abstract: Provided is an axial gap-type rotary electric machine in which a first stator, a second stator, and a rotor are arranged in a direction of a rotary shaft of the rotor. The first stator includes a first coil and a first core. The second stator includes a second coil and a second core. The first core includes an annular first yoke, a plurality of first teeth, and a first mark indicating a reference position in a circumferential direction of the first yoke. The second core includes an annular second yoke, a plurality of second teeth, and a second mark indicating a reference position in a circumferential direction of the second yoke. When viewed in the direction of the rotary shaft, the first mark and the second mark are symmetrically positioned with respect to the rotary shaft.Type: ApplicationFiled: September 8, 2020Publication date: October 13, 2022Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tatsuya SAITO, Tomoyuki UENO, Yuichi NAKAMURA