Patents by Inventor Shigeya Kawaminami
Shigeya Kawaminami 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: 6838798Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: GrantFiled: January 8, 2003Date of Patent: January 4, 2005Assignee: Hitachi, Ltd.Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Publication number: 20030107291Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: ApplicationFiled: January 8, 2003Publication date: June 12, 2003Applicant: Hitachi, Ltd.Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Patent number: 6552461Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: GrantFiled: March 6, 2002Date of Patent: April 22, 2003Assignee: Hitachi, Ltd.Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Patent number: 6496339Abstract: An electric power supply device 13, combining an overload protector device 3 and a starter device 4 each other, and an equipment using thereof comprises a socket terminal 5 connected to an electric part of the overload protector device 3, and a convex portion 10c opposing to a tip opening portion 5a of the socket terminal 5, which is nearly in conformity with the shape of that tip opening portion and has a little gap therebetween, wherein while keeping superiority in work of assembling external apparatuses onto the terminal pins, prying force caused onto the tip opening portion when the socket terminals of the starter device are fitted onto terminal pins of an external equipment is suppressed, thereby to improve reliability.Type: GrantFiled: May 23, 2001Date of Patent: December 17, 2002Assignees: Hitachi, Ltd., Yamada Electric Mfg. Co. Ltd.Inventors: Wataru Sugawara, Toshio Shimada, Shigeya Kawaminami, Masahiko Niino
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Publication number: 20020130574Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: ApplicationFiled: March 6, 2002Publication date: September 19, 2002Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Publication number: 20020018326Abstract: An electric power supply device 13, combining an overload protector device 3 and a starter device 4 each other, and an equipment using thereof comprises a socket terminal 5 connected to an electric part of the overload protector device 3, and a convex portion 10c opposing to a tip opening portion 5a of the socket terminal 5, which is nearly in conformity with the shape of that tip opening portion and has a little gap therebetween, wherein while keeping superiority in work of assembling external apparatuses onto the terminal pins, prying force caused onto the tip opening portion when the socket terminals of the starter device are fitted onto terminal pins of an external equipment is suppressed, thereby to improve reliability.Type: ApplicationFiled: May 23, 2001Publication date: February 14, 2002Inventors: Wataru Sugawara, Toshio Shimada, Shigeya Kawaminami, Masahiko Niino
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Patent number: 6336336Abstract: In a rotary piston compressor and refrigerating equipment employing the rotary piston compressor, the interior of a cylinder chamber is divided into a suction chamber and a compression chamber by a vane which is formed unitarily with a roller. The rotary bushing on the compression chamber side which supports the vane is so arranged as to be moved with a specific pressure, so that a communicating passage for communication between the compression chamber and a space on the discharge side will be opened and closed with the movement of the rotary bushing on the compression chamber side.Type: GrantFiled: March 20, 2000Date of Patent: January 8, 2002Assignee: Hitachi, Ltd.Inventors: Shigeya Kawaminami, Tatsuya Wakana, Kenichi Oshima, Minoru Oki, Tatsuo Horie
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Patent number: 6270329Abstract: A rotary compressor is provided with a cylinder which defines a cylinder chamber and a piston disposed in the cylinder chamber. The piston includes a roller which performs a revolving motion within the cylinder chamber and a vane which partitions the interior of the cylinder chamber into a suction chamber and a compression chamber. A small space is provided so as to communicate with the compression chamber in only a predetermined section without communicating with the suction chamber so as to suppress noise generated by a pressure fluctuation in the interior of a compression chamber and, at the same time, can prevent the occurrence of a loss induced by re-expansion of a refrigerant remaining in a small space and a loss induced by return of the refrigerant to a suction chamber.Type: GrantFiled: September 20, 1999Date of Patent: August 7, 2001Assignee: Hiatchi, Ltd.Inventors: Kenichi Oshima, Minoru Ooki, Shigeya Kawaminami, Tatuya Wakana
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Patent number: 5304045Abstract: A closed type motor-driven compressor includes a motor accommodated in a closed container and a compression mechanism connected through a crank shaft to the motor. A shielding member having a cylindrical portion substantially concentric with the axis of the compression mechanism is disposed between the motor and the compression mechanism. This shielding member defines a shielding air space between the motor and the compression mechanism for preventing a permeation of a lubricating oil. An inlet of a discharge pipe of the closed type motor-driven compressor is positioned inwardly of this shielding air space.Type: GrantFiled: September 8, 1992Date of Patent: April 19, 1994Assignee: Hitachi, Ltd.Inventors: Nobutoshi Hoshino, Kazuo Ikeda, Kooichi Inaba, Shigeya Kawaminami, Atushi Shimada, Tatuya Wakana, Nobuo Abe, Kunio Fukami, Hidenari Takada, Masanori Wakaizumi, Mitsuaki Haneda, Keiji Taguchi, Toshio Yamanaka, Tatuo Horie, Masami Masuda
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Patent number: 5184269Abstract: An overload protective device to the disposed in an electric circuit serving to supply current to a load has a pair of fixed contacts provided inside of a case and an inversible disk-like bimetal of a curved shape having a pair of movable contacts capable of coming in contact with the fixed contacts, respectively. A shaft is fixed to the case at one end thereof and formed with a head portion at the free end portion. The shaft extends though a hole formed in the central portion of the bimetal. When the bimetal breaks, a circuit breaker breaks the electric circuit permanently to thereby prevent the load and the overload protective device from being burnt out.Type: GrantFiled: April 8, 1991Date of Patent: February 2, 1993Assignee: Hitachi, Ltd.Inventors: Toshio Shimada, Morio Kobayashi, Takemi Tada, Shigeya Kawaminami