Patents by Inventor Yoshikazu Yamagata
Yoshikazu Yamagata 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: 11764636Abstract: A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.Type: GrantFiled: January 5, 2021Date of Patent: September 19, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takanori Amaya, Akihiko Watanabe, Yoshikazu Yamagata, Yasuo Nanbu, Hisaaki Kato, Yasunori Wakamori
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Patent number: 11190076Abstract: A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.Type: GrantFiled: November 22, 2017Date of Patent: November 30, 2021Assignee: PANASONIC INTELIECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takanori Amaya, Akihiko Watanabe, Yoshikazu Yamagata, Yasuo Nanbu, Hisaaki Kato, Yasunori Wakamori
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Publication number: 20210126505Abstract: A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.Type: ApplicationFiled: January 5, 2021Publication date: April 29, 2021Inventors: Takanori AMAYA, Akihiko WATANABE, Yoshikazu YAMAGATA, Yasuo NANBU, Hisaaki KATO, Yasunori WAKAMORI
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Patent number: 10985621Abstract: A molded motor of the present invention includes a rotor, a stator, a pair of shaft bearings, a pair of metal brackets, and a molding resin. The rotor has: a rotary shaft extending in a shaft direction; and a rotary body that has a permanent magnet and is fixed to the rotary shaft. The stator has: a stator core on which a plurality of salient poles are formed; and a plurality of coils each wound on each salient pole via an insulator, where the stator is covered by the molding resin and is disposed to face the rotor. The pair of metal brackets each fix each of the shaft bearings, and the shaft bearings rotatably support the rotor. Further, the rotary body has a dielectric layer formed between the rotary shaft and an outer peripheral surface of the rotary body. A metal member is provided, on an outer peripheral side of a coil end of the coil and on at least a part facing the coil end, in a circumferential direction.Type: GrantFiled: February 26, 2018Date of Patent: April 20, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshikazu Yamagata, Akihiko Watanabe, Takanori Amaya, Yasuo Nanbu, Hisaaki Kato, Yasunori Wakamori, Masayuki Taniguchi
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Publication number: 20200028404Abstract: An electric motor includes: a stator that has a stator core and has coils that are formed of an electric wire wound on the stator core and form a plurality of phases; a resin covering the stator; and a wire break facilitator that facilitates the electric wire to break at a time of abnormality. In the electric motor having the stator in which the coils are covered with molding resin, the wire break facilitator is attached to at least one of: a transition wire part between the coils wound on the stator core; a connection part at a neutral point; and a connection part of a lead wire.Type: ApplicationFiled: January 26, 2018Publication date: January 23, 2020Inventors: YOSHIKAZU YAMAGATA, AKIHIKO WATANABE, TAKANORI AMAYA, IKUO OZAKI
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Publication number: 20200006991Abstract: A molded motor of the present invention includes a rotor, a stator, a pair of shaft bearings, a pair of metal brackets, and a molding resin. The rotor has: a rotary shaft extending in a shaft direction; and a rotary body that has a permanent magnet and is fixed to the rotary shaft. The stator has: a stator core on which a plurality of salient poles are formed; and a plurality of coils each wound on each salient pole via an insulator, where the stator is covered by the molding resin and is disposed to face the rotor. The pair of metal brackets each fix each of the shaft bearings, and the shaft bearings rotatably support the rotor. Further, the rotary body has a dielectric layer formed between the rotary shaft and an outer peripheral surface of the rotary body. A metal member is provided, on an outer peripheral side of a coil end of the coil and on at least a part facing the coil end, in a circumferential direction.Type: ApplicationFiled: February 26, 2018Publication date: January 2, 2020Inventors: YOSHIKAZU YAMAGATA, AKIHIKO WATANABE, TAKANORI AMAYA, YASUO NANBU, HISAAKI KATO, YASUNORI WAKAMORI, MASAYUKI TANIGUCHI
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Publication number: 20190372421Abstract: A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.Type: ApplicationFiled: November 22, 2017Publication date: December 5, 2019Inventors: TAKANORI AMAYA, AKIHIKO WATANABE, YOSHIKAZU YAMAGATA, YASUO NANBU, HISAAKI KATO, YASUNORI WAKAMORI
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Patent number: 9647503Abstract: The present invention provides a rotary motor including at least a field magnet having field winding, and an armature having armature winding with an electrically insulating coating material applied thereto, and the coating material includes at least two layers of: a lower-layer coating material including a first low-viscosity resin liquid; and an upper-layer coating material including a second low-viscosity resin liquid with at least hollow glass beads and a thermoplastic resin added thereto. Thus, a rotary motor can be achieved which achieves a balance between an efficiency improvement and reliability.Type: GrantFiled: June 14, 2012Date of Patent: May 9, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventor: Yoshikazu Yamagata
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Publication number: 20150130300Abstract: The present invention provides a rotary motor including at least a field magnet having field winding, and an armature having armature winding with an electrically insulating coating material applied thereto, and the coating material includes at least two layers of; a lower-layer coating material including a first low-viscosity resin liquid; and an upper-layer coating material including a second low-viscosity resin liquid with at least hollow glass beads and a thermoplastic resin added thereto. Thus, a rotary motor can be achieved which achieves a balance between an efficiency improvement and reliability.Type: ApplicationFiled: June 14, 2012Publication date: May 14, 2015Applicant: PANASONIC CORPORATIONInventor: Yoshikazu Yamagata
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Patent number: 8242659Abstract: The mold commutator of the present invention comprises a plurality of commutator segments made of copper or copper alloy and circumferentially arranged, a plurality of spark absorbing elements, disposed between adjacent commutator segments, with paired parallel surfaces respectively having electrodes thereon, and a resin mold portion which integrates these portions into one piece. The spark absorbing element is electrically connected to the commutator segment via the electrode, and spark voltage generated at the commutator segment is absorbed by current flowing between the electrodes.Type: GrantFiled: April 8, 2008Date of Patent: August 14, 2012Assignee: Panasonic CorporationInventors: Noriteru Maeda, Hirofumi Mizukami, Akihiko Yamazaki, Seiji Kurozumi, Yoshikazu Yamagata
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Publication number: 20100141081Abstract: The mold commutator of the present invention comprises a plurality of commutator segments made of copper or copper alloy and circumferentially arranged, a plurality of spark absorbing elements, disposed between adjacent commutator segments, with paired parallel surfaces respectively having electrodes thereon, and a resin mold portion which integrates these portions into one piece. The spark absorbing element is electrically connected to the commutator segment via the electrode, and spark voltage generated at the commutator segment is absorbed by current flowing between the electrodes.Type: ApplicationFiled: April 8, 2008Publication date: June 10, 2010Applicant: Panasonic CorporationInventors: Noriteru Maeda, Hirofumi Mizukami, Akihiko Yamazaki, Seiji Kurozumi, Yoshikazu Yamagata
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Patent number: 6673463Abstract: A structure material of the present invention consisting essentially of 20 parts by weight or more of a polymer mixture consisting essentially of of a thermoplastic aromatic polyester and a thermoplastic aliphatic polyester on the basis of 100 parts by weight of the structure material. The polymer mixture comprises 3 to 40 parts by weight of the aliphatic polyester on the basis of 100 parts by weight of the polymer mixture.Type: GrantFiled: March 31, 1997Date of Patent: January 6, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Onishi, Takahiko Terada, Yoshikazu Yamagata
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Patent number: 6599450Abstract: A recycling method of producing magnetic material powder from bonded magnets which are produced by mixing magnetic material powder, as raw material powder, with a binder and subjecting a mixture to molding forming, has at least the steps of: (a) separating and collecting the magnetic material powder from the bonded magnets by removing all or a prescribed percentage of the binder contained in the magnets; (b) removing all or a prescribed percentage of the particles of diameter smaller than a prescribed particle diameter from the separated and collected magnetic material powder; and (c) mixing the magnetic material powder, from which the particles of diameter smaller than the prescribed one are removed, with a virgin magnetic material powder in a prescribed mixing ratio, so as to produce a new raw material powder.Type: GrantFiled: October 26, 2000Date of Patent: July 29, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takahiko Terada, Hiroshi Onishi, Yoshikazu Yamagata, Fumitoshi Yamashita
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Patent number: 6533837Abstract: A method of recovering magnetic powder from rare earth bond magnet comprising a process of soaking the rare earth bond magnet in a decomposing solution, or holding it in a gas phase of the decomposing solution, containing at least one solvent selected from a group comprising tetralin, naphthalene, 1,4-hydroxynaphthalene, naphthol, biphenyl, 2-hexanone, acetonylacetone, phorone cyclohexanone and methlcyclohexanone, and heating at a temperature not lower than 230° C. A method of recycling recovered magnetic powder by substituting at least a part or all of magnetic powder in the molding compound of a second rare earth bond magnet. For preventing deterioration of magnetic powder from oxidation at surface, air in the decomposition vessel is substituted with nitrogen gas, helium gas and argon gas or is reduced to a pressure not higher than 10−2 Torr.Type: GrantFiled: October 3, 2000Date of Patent: March 18, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshikazu Yamagata, Fumitoshi Yamashita
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Patent number: 6387294Abstract: A magnet having a maximum energy product at 20° C. of 18 MGOe or more, and an extremely excellent magnetic performance is obtained. A magnet stable in the magnetic performance in practical temperature range is obtained. A magnet having an excellent recycling performance is obtained. A magnet motor using such rare earth resin magnet generates a potent static magnetic field in the space with the armature core. The motor output is enhanced, and the current consumption is lowered. The rare earth resin magnet comprises at least one resin of thermoplastic resin and thermoplastic elastomer, pentaerythritol stearic acid triester, and rare earth magnetic powder. The rare earth magnetic powder, resin, and pentaerythritol stearic acid triester form a mutually mixed resin magnet composition, and this resin magnet composition has a predetermined shape. A magnet rotor has this rare earth resin magnet.Type: GrantFiled: October 10, 2000Date of Patent: May 14, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Fumitoshi Yamashita, Yoshikazu Yamagata, Hiromichi Fujimoto
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Patent number: 6332998Abstract: A molding composition containing an unsaturated alkyd resin and an unsaturated polyester containing a crosslinking monomer, which may be 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate. A molded part is manufactured by (a) covering the surrounding of a stator part having a heat generating coil with the molding composition, (b) feeding power to the coil for generating heat in the stator part, and (c) curing the molding composition by the heat generated in the stator part. The curing time is shortened, the molding cycle is improved, and, as a result, a molding composition excellent in productivity is presented, and by using this molding composition, molded parts are manufactured at excellent productivity.Type: GrantFiled: April 24, 2000Date of Patent: December 25, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshikazu Yamagata, Fumitoshi Yamashita, Hiroshi Onishi, Takahiko Terada
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Patent number: 6235074Abstract: There is provided a process of recovering copper from winding composed of an enameled copper wire having a polyester and/or a polyurethane based insulating coating thereon, and the process includes the steps of immersing the winding into an alkali solution, removing alkali attaching to the winding, and melting the winding using high frequency heating.Type: GrantFiled: April 8, 1997Date of Patent: May 22, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Katsuhiro Murano, Fumitoshi Yamashita, Hiroshi Onishi, Yoshikazu Yamagata, Takahiko Terada
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Patent number: 5969009Abstract: Disclosed is a molding material which can be easily decomposed by using an alkaline solution. This molding material comprises, as a binder, a thermosetting composition of an unsaturated polyester, an addition-polymerizable monomer and a low shrink agent, the addition-polymerizable monomer containing a monomer having an affinity for alkaline solution. As the addition-polymerizable monomer, there can be used a compound having an ethylene bond and a carbonyl or sulfonyl group, e.g. carboxylic and sulfonic acids, and metal salts, esters and acid anhydrides of these acids. There is also disclosed a molded motor comprising a molded part of an iron core, a winding and the above molding material, the molded part being integrally molded so as to coat at least one part of the iron core and winding with the molding material.Type: GrantFiled: August 14, 1997Date of Patent: October 19, 1999Assignee: Matsushita Electric Industrial Co, Ltd.Inventors: Takahiko Terada, Yoshikazu Yamagata, Hiroshi Onishi
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Patent number: 5874482Abstract: A method for disposal of a thermosetting resin containing a material, at least part of which is affected by an alkaline aqueous solution, is disclosed. It comprises at least two steps of including a step of immersing the molded product in an alkaline aqueous solution and a subsequent step of immersing the molded product in water. This method does not require a high temperature as required in a thermal decomposition and does not generate any exhaust gas, and consumes only small energy.Type: GrantFiled: January 16, 1997Date of Patent: February 23, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshikazu Yamagata, Takahiko Terada, Hiroshi Onishi, Fumitoshi Yamashita
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Patent number: 5846920Abstract: A cleaning agent for removing a residue of soldering flux, which essentially consists of mono-, di-, or tri-alkylene glycol mono branched C.sub.3 -C.sub.5 alkyl ether, which can remove with high safety both ionic residues and resinous materials contained in a soldering flux, which remain on the surface of a soldered electronic substrate. The cleaning agent of the present invention does not adversely affect the insulation and materials used in an electronic device.Type: GrantFiled: March 25, 1996Date of Patent: December 8, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toru Shiino, Kenichi Nobuta, Yoshikazu Yamagata, Tokihiko Shimizu