Patents by Inventor Hisakazu Kataoka
Hisakazu Kataoka 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: 7218026Abstract: The objective of this invention is to provide a motor which can reduce occurrence of a torque reduction in the overload, and also lower the temperature of a motor main body immediately even in the case of a temperature rise in the motor main body.Type: GrantFiled: November 8, 2002Date of Patent: May 15, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Murakami, Hisakazu Kataoka, Akihiko Watanabe, Hiroaki Tanaka, Akihiko Yamazaki, Shinichi Okuyama, Yasutake Seki
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Patent number: 6952064Abstract: It is intended to suppress the vibration and noise during operation of a concentrated winding electric motor and to provide an electric motor with high efficiency, low vibration and low noise. A skew is formed on at least one of a stator (10) and a rotor (20), arranged with a concentrated winding, and a winding vibration damping body (18) is inserted between windings (13) of different phases within a winding groove (19) and contacted therewith.Type: GrantFiled: July 11, 2002Date of Patent: October 4, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideharu Hiwaki, Yoshinari Asano, Hisakazu Kataoka, Sunao Hashimoto, Shinichi Okuyama, Hiroshi Murakami
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Patent number: 6940204Abstract: A low-vibration/noise brushless motor capable of limiting the height of coil ends, and a low-current-leak hermetic compressor includes the brushless motor. This brushless motor is of a three-phase full-pitch-winding type including a stator having coils (20) inserted in slots in a one coil per one slot manner. Coil ends (21) of the coils (20) are arranged such that the first coil (201) is arranged outside the second and third coils (202, 203) in a place (A) where the second and third coils (202, 203) are inserted in a pair of slots adjacent to each other, the second coil (202) is arranged from inside of the first coil (201) to outside of the third coil (203) in a place (B) where the first and third coils are inserted in another pair of slots adjacent, and the third coil (203) is arranged inside the first and second coils (201, 202) in a place (C) where the first and second coils (201, 202) are inserted in still another pair of adjacent slots. The coil ends (21) are shaped in the axial direction.Type: GrantFiled: July 1, 2003Date of Patent: September 6, 2005Assignees: Matsushita Electric Industrial Co., Ltd., Kabushiki Kaisha Toyota JidoshokkiInventors: Akihiko Yamazaki, Shinichi Okuyama, Yasutake Seki, Hiroshi Murakami, Hisakazu Kataoka, Osaaki Morino, Yasuharu Odachi, Ken Suitou
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Patent number: 6936945Abstract: A structure of a rotor used in a synchronous motor employing both of permanent magnets and a stator using concentrated windings is disclosed. Slits (13) provided in a section of a rotor laminated in a direction of a rotary shaft are shaped like an arc or a bow, and the shape protrudes toward an outside rim of rotor (12). Permanent magnets (14) are inserted into slits (13). This structure produces less magnetic salient poles than a conventional rotor, so that a magnetic flux density can be lowered, and an efficient motor with less loss is obtainable.Type: GrantFiled: June 14, 2001Date of Patent: August 30, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Murakami, Noriyoshi Nishiyama, Taro Kishibe, Haruhiko Kado, Toshiyuki Tamamura, Hisakazu Kataoka, Masayuki Shinto, Osaaki Morino
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Patent number: 6870293Abstract: To provide a motor which can suppress vibration and noise during an operation of a concentrated winding motor and can achieve low vibration and low noise with high efficiency. Skew is formed on at least one of a stator (10) provided with concentrated windings and a rotor (20), and the windings (13—13) of different phases in a groove (19) for windings are brought into contact with each other directly or via an insulating material.Type: GrantFiled: July 11, 2002Date of Patent: March 22, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hisakazu Kataoka, Hiroshi Murakami, Hideharu Hiwaki, Sunao Hashimoto, Yasuharu Odachi, Hirohito Hayashi
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Publication number: 20050035680Abstract: The objective of this invention is to provide a motor which can reduce occurrence of a torque reduction in the overload, and also lower the temperature of a motor main body immediately even in the case of a temperature rise in the motor main body.Type: ApplicationFiled: November 8, 2002Publication date: February 17, 2005Inventors: Hiroshi Murakami, Hisakazu Kataoka, Akihiko Watanabe, Hiroaki Tanaka, Akihiko Yamazaki, Shinichi Okuyama, Yasutake Seki
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Publication number: 20040195926Abstract: It is intended to suppress the vibration and noise during operation of a concentrated winding electric motor and to provide an electric motor with high efficiency, low vibration and low noise. A skew is formed on at least one of a stator (10) and a rotor (20), arranged with a concentrated winding, and a winding vibration damping body (18) is inserted between windings (13) of different phases within a winding groove (19) and contacted therewith.Type: ApplicationFiled: May 19, 2004Publication date: October 7, 2004Inventors: Hideharu Hiwaki, Yoshinari Asano, Hisakazu Kataoka, Sunao Hashimoto, Shinichi Okuyama, Hiroshi Murakami
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Patent number: 6799362Abstract: A motor and a method for manufacturing thereof use a rotor having permanent magnets and stators. The highest revolving speed of a motor is adjusted by using end plates of different thickness. The end plates are made of a magnetic material and disposed at the end faces of the rotor. The end plates made of a magnetic material provide part of the magnetic flux generated from the permanent magnets with short circuits within the inside of the rotor. The magnetic flux that links with the coil can be adjusted by using end plates of different thickness. Therefore, the highest revolving speed of a motor can be finely adjusted with ease.Type: GrantFiled: March 3, 2003Date of Patent: October 5, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroshi Murakami, Hisakazu Kataoka, Osaaki Morino, Yoshinari Asano, Toshiyuki Tamamura, Haruhiko Kado, Akihiko Yamazaki, Yukio Honda
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Publication number: 20040004408Abstract: A low-vibration/noise brushless motor capable of limiting the height of coil ends, and a low-current-leak hermetic compressor includes the brushless motor. This brushless motor is of a three-phase full-pitch-winding type including a stator having coils (20) inserted in slots in a one coil per one slot manner. Coil ends (21) of the coils (20) are arranged such that the first coil (201) is arranged outside the second and third coils (202, 203) in a place (A) where the second and third coils (202, 203) are inserted in a pair of slots adjacent to each other, the second coil (202) is arranged from inside of the first coil (201) to outside of the third coil (203) in a place (B) where the first and third coils are inserted in another pair of slots adjacent, and the third coil (203) is arranged inside the first and second coils (201, 202) in a place (C) where the first and second coils (201, 202) are inserted in still another pair of adjacent slots. The coil ends (21) are shaped in the axial direction.Type: ApplicationFiled: July 1, 2003Publication date: January 8, 2004Applicants: MATSUSHITA ELEC. IND. CO. LTD., KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Akihiko Yamazaki, Shinichi Okuyama, Yasutake Seki, Hiroshi Murakami, Hisakazu Kataoka, Osaaki Morino, Yasuharu Odachi, Ken Suitou
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Publication number: 20030230948Abstract: A motor and a method for manufacturing thereof use a rotor having permanent magnets and stators. The highest revolving speed of a motor is adjusted by using end plates of different thickness. The end plates are made of a magnetic material and disposed at the end faces of the rotor. The end plates made of a magnetic material provide part of the magnetic flux generated from the permanent magnets with short circuits within the inside of the rotor. The magnetic flux that links with the coil can be adjusted by using end plates of different thickness. Therefore, the highest revolving speed of a motor can be finely adjusted with ease.Type: ApplicationFiled: March 3, 2003Publication date: December 18, 2003Inventors: Hiroshi Murakami, Hisakazu Kataoka, Osaaki Morino, Yoshinari Asano, Toshiyuki Tamamura, Haruhiko Kado, Akihiko Yamazaki, Yukio Honda
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Publication number: 20030168924Abstract: A structure of a rotor used in a synchronous motor employing both of permanent magnets and a stator using concentrated windings is disclosed. Slits (13) provided in a section of a rotor laminated in a direction of a rotary shaft are shaped like an arc or a bow, and the shape protrudes toward an outside rim of rotor (12). Permanent magnets (14) are inserted into slits (13). This structure produces less magnetic salient poles than a conventional rotor, so that a magnetic flux density can be lowered, and an efficient motor with less loss is obtainable.Type: ApplicationFiled: April 28, 2003Publication date: September 11, 2003Inventors: Hiroshi Murakami, Noriyoshi Nishiyama, Taro Kishibe, Haruhiko Kado, Toshiyuki Tamamura, Hisakazu Kataoka, Masayuki Shinto, Osaaki Morino
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Patent number: 6544009Abstract: A compressor and an electric motor in which their weights are successfully reduced by employing a light-metal conductor wire for a winding, by reducing constituent components of a stator and a rotor of the electric motor, by providing a notch or a hole, and by eliminating the need for components necessary to mount the stator in a housing or a casing.Type: GrantFiled: March 29, 2001Date of Patent: April 8, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiko Makino, Tatsuhisa Taguchi, Yoshifumi Abe, Hisakazu Kataoka, Yoshinari Asano
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Patent number: 6517328Abstract: An electric motor accommodated fixedly in position within its own casing or a housing of a compressor is provided with a non-conductive member between its stator and the casing or the housing, for preventing the stator and the casing or housing from making contact with each other. The non-conductive member is made of a material having a thermal expansion coefficient greater than that of the stator, such as resin.Type: GrantFiled: April 3, 2001Date of Patent: February 11, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masahiko Makino, Tatsuhisa Taguchi, Nobuaki Ogawa, Hisakazu Kataoka, Yoshinari Asano
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Publication number: 20030011272Abstract: To provide a motor which can suppress vibration and noise during an operation of a concentrated winding motor and can achieve low vibration and low noise with high efficiency. Skew is formed on at least one of a stator (10) provided with concentrated windings and a rotor (20), and the windings (13-13) of different phases in a groove (19) for windings are brought into contact with each other directly or via an insulating material.Type: ApplicationFiled: July 11, 2002Publication date: January 16, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hisakazu Kataoka, Hiroshi Murakami, Hideharu Hiwaki, Sunao Hashimoto, Yasuharu Odachi, Hirohito Hayashi
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Publication number: 20010038797Abstract: An electric motor accommodated fixedly in position within its own casing or a housing of a compressor is provided with a non-conductive member between its stator and the casing or the housing, for preventing the stator and the casing or housing from making contact with each other. The non-conductive member is made of a material having a thermal expansion coefficient greater than that of the stator, such as resin.Type: ApplicationFiled: April 3, 2001Publication date: November 8, 2001Applicant: MATSUSHIA ELECTRIC INDUSTRIAL CO., Ltd..Inventors: Masahiko Makino, Tatsuhisa Taguchi, Nobuaki Ogawa, Hisakazu Kataoka, Yoshinari Asano
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Publication number: 20010036414Abstract: A compressor and an electric motor in which their weights are successfully reduced by employing a light-metal conductor wire for a winding, by reducing constituent components of a stator and a rotor of the electric motor, by providing a notch or a hole, and by eliminating the need for components necessary to mount the stator in a housing or a casing.Type: ApplicationFiled: March 29, 2001Publication date: November 1, 2001Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Masahiko Makino, Tatsuhisa Taguchi, Yoshifumi Abe, Hisakazu Kataoka, Yoshinari Asano