Patents by Inventor Ryuichi Ikeda
Ryuichi Ikeda 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: 20140113607Abstract: A first communication device determines whether or not reception information indicating reception of predetermined information should be transmitted to a second communication device. The first communication unit transmits the reception information, which has been determined to be information that should be transmitted to the second communication device, to the second communication device. The second communication device produces output based on the reception information that has been transmitted from the first communication device.Type: ApplicationFiled: May 29, 2012Publication date: April 24, 2014Applicant: NEC CASIO MOBILE COMMUNICATIONS, LTD.Inventor: Ryuichi Ikeda
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Publication number: 20030055905Abstract: A method is described for transmitting and receiving electronic mail and a device utilized therefor, which are capable of associating a plurality of data, and transmitting and receiving the associated data via electronic mail. To achieve this object, a filename is attached to a first data and stored on a storage medium, and a filename, at least a portion of which is common to the filename of the first data, is attached to a second data and stored on the storage medium. When instructions for transmitting the first data are inputted, the first data and second data are read from the storage medium, and the first data and second data are transmitted.Type: ApplicationFiled: August 29, 2002Publication date: March 20, 2003Applicant: Hitachi, Ltd.Inventors: Mika Nishiyama, Hiroshi Shimizu, Ryuichi Ikeda, Hitoshi Kobayashi
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Patent number: 6522045Abstract: A vehicular AC generator comprising a pair of cores included in a rotor and supported by a rotating shaft, a plurality of trapezoidal-shaped claws as magnetic poles protruding on the outer periphery edges of the pair of cores, and a pair of fans attached to the front side and the rear side of the cores, at least one of the fans having an outer diameter in the range between 85% and 96% of the outer diameter of each of the cores, each of the claws having a tapered portion for gradually decreasing the outer diameter of a shoulder portion of the claw in the direction toward the end surface of the core so that the outer diameter of at least one of the cores faced to the at least one of the fans becomes substantially the same as the outer diameter of the at least one of the fans, whereby the sound caused by cutting wind by the rotation of the centrifugal fans can be reduced without deteriorating the cooling efficiency of the coil ends of the stator.Type: GrantFiled: November 2, 2001Date of Patent: February 18, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Ryuichi Ikeda, Katsumi Adachi
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Patent number: 6522046Abstract: A vehicular AC generator comprising a pair of cores included in a rotor and supported by a rotating shaft, a plurality of trapezoidal-shaped claws as magnetic poles protruding on the outer periphery edges of the pair of cores, and a pair of fans attached to the front side and the rear side of the cores, at least one of the fans having an outer diameter in the range between 85% and 96% of the outer diameter of each of the cores, each of the claws having a tapered portion for gradually decreasing the outer diameter of a shoulder portion of the claw in the direction toward the end surface of the core so that the outer diameter of at least one of the cores faced to the at least one of the fans becomes substantially the same as the outer diameter of the at least one of the fans, whereby the sound caused by cutting wind by the rotation of the centrifugal fans can be reduced without deteriorating the cooling efficiency of the coil ends of the stator.Type: GrantFiled: March 26, 2002Date of Patent: February 18, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Ryuichi Ikeda, Katsumi Adachi
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Patent number: 6426580Abstract: A vehicular AC generator comprising a pair of cores included in a rotor and supported by a rotating shaft, a plurality of trapezoidal-shaped claws as magnetic poles protruding on the outer periphery edges of the pair of cores, and a pair of fans attached to the front side and the rear side of the cores, at least one of the fans having an outer diameter in the range between 85% and 96% of the outer diameter of each of the cores, each of the claws having a tapered portion for gradually decreasing the outer diameter of a shoulder portion of the claw in the direction toward the end surface of the core so that the outer diameter of at least one of the cores faced to the at least one of the fans becomes substantially the same as the outer diameter of the at least one of the fans, whereby the sound caused by cutting wind by the rotation of the centrifugal fans can be reduced without deteriorating the cooling efficiency of the coil ends of the stator.Type: GrantFiled: April 10, 1997Date of Patent: July 30, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Ryuichi Ikeda, Katsumi Adachi
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Publication number: 20020096965Abstract: A vehicular AC generator comprising a pair of cores included in a rotor and supported by a rotating shaft, a plurality of trapezoidal-shaped claws as magnetic poles protruding on the outer periphery edges of the pair of cores, and a pair of fans attached to the front side and the rear side of the cores, at least one of the fans having an outer diameter in the range between 85% and 96% of the outer diameter of each of the cores, each of the claws having a tapered portion for gradually decreasing the outer diameter of a shoulder portion of the claw in the direction toward the end surface of the core so that the outer diameter of at least one of the cores faced to the at least one of the fans becomes substantially the same as the outer diameter of the at least one of the fans, whereby the sound caused by cutting wind by the rotation of the centrifugal fans can be reduced without deteriorating the cooling efficiency of the coil ends of the stator.Type: ApplicationFiled: March 26, 2002Publication date: July 25, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Ryuichi Ikeda, Katsumi Adachi
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Patent number: 6388354Abstract: A motor for an electric power steering assembly includes a yoke, a multi-polar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator including a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.Type: GrantFiled: May 18, 1999Date of Patent: May 14, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto
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Patent number: 6388355Abstract: A motor for an electric power steering assembly includes a yoke, a multipolar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator comprising a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.Type: GrantFiled: July 2, 2001Date of Patent: May 14, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto
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Publication number: 20020047487Abstract: A vehicular AC generator comprising a pair of cores included in a rotor and supported by a rotating shaft, a plurality of trapezoidal-shaped claws as magnetic poles protruding on the outer periphery edges of the pair of cores, and a pair of fans attached to the front side and the rear side of the cores, at least one of the fans having an outer diameter in the range between 85% and 96% of the outer diameter of each of the cores, each of the claws having a tapered portion for gradually decreasing the outer diameter of a shoulder portion of the claw in the direction toward the end surface of the core so that the outer diameter of at least one of the cores faced to the at least one of the fans becomes substantially the same as the outer diameter of the at least one of the fans, whereby the sound caused by cutting wind by the rotation of the centrifugal fans can be reduced without deteriorating the cooling efficiency of the coil ends of the stator.Type: ApplicationFiled: November 2, 2001Publication date: April 25, 2002Inventors: Ryuichi Ikeda, Katsumi Adachi
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Publication number: 20020008430Abstract: A motor for an electric power steering assembly comprises a yoke, a multi-polar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator comprising a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.Type: ApplicationFiled: July 2, 2001Publication date: January 24, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto
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Patent number: 6218755Abstract: A dynamo-electric machine comprises a shaft, a core secured to the shaft having slots formed therein extending in the axial direction, a winding composed of a wiring wound by a lap winding method through the slots, a commutator having commutator segments disposed at one end of the core and secured to the shaft, and equalizing connectors electrically connecting commutator segments which should have the same electric potential to each other, wherein the equalizing connectors are disposed in close contact with an end surface of the commutator.Type: GrantFiled: May 24, 1999Date of Patent: April 17, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Akihiro Daikoku, Yuji Nakahara, Kyouhei Yamamoto, Kazuhisa Takashima
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Patent number: 6181046Abstract: A commutator assembly for an electric motor includes a commutator having commutator segments arranged circumferentially, brushes contacting the commutator segments, and an equalizer connecting commutator segments so they have the same electric potential, the equalizer including printed circuit boards with insulating substrates and a connecting plate having an electrically conducting film on the insulating substrate, electrically connected to the commutator segments.Type: GrantFiled: August 9, 1999Date of Patent: January 30, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akihiro Daikoku, Shigekazu Sakabe, Toshinori Tanaka, Ryuichi Ikeda, Yuji Nakahara, Kyouhei Yamamoto
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Patent number: 6057623Abstract: A dynamo-electric machine comprises an armature having a winding composed of a wire or wires wound by a lap winding method through slots extending in the axial direction formed on the outer circumferential surface of a core secured to a shaft, a commutator having commutator segments secured to the shaft, and an equalize disposed adjacent to the commutator in the direction of the axis of the commutator having terminals stacked in the axial direction which electrically connect commutator segments which should have the same electric potential.Type: GrantFiled: March 16, 1999Date of Patent: May 2, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Kyouhei Yamamoto, Akihiro Daikoku
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Patent number: 6057626Abstract: A commutator for a dynamo-electric machine according to the present invention comprises a cylindrical commutator main body provided with a plurality of commutator segments disposed around the circumference thereof, an equalizer assembly disposed inside the commutator main body provided with equalizer segments electrically connecting commutator segments which are to have the same electric potential, and an insulating resin portion disposed within the space inside the commutator main body integrating the commutator main body and the equalizer assembly.Type: GrantFiled: August 5, 1999Date of Patent: May 2, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Akihiro Daikoku, Yuji Nakahara, Nobuaki Miyake, Kyouhei Yamamoto
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Patent number: 5842944Abstract: To perform the change-over smoothly between a uniform velocity mode and an acceleration mode and to relieve a shock at the time of changing-over the velocity, there are provided, in an auxiliary machine driving apparatus, a plurality of planet gears (2) rotatably supported on a carrier (21) connected to an input shaft (6), an internal gear (3) which meshes with the outer circumferences of the respective planet gears (2) and rotatably supported on a stationary portion, an electromagnetic powder brake (50) for connecting/disconnecting the internal gear (3) to/from the stationary portion, an output shaft (4) having a sun gear (41) which meshes with the inner circumferences of the respective planet gears (2) so as to be rotatably supported thereby, and a one-way clutch (8) provided between the carrier (21) and the output shaft (41).Type: GrantFiled: September 5, 1996Date of Patent: December 1, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Morishita, Katsumi Adachi, Ryuichi Ikeda, Kyoko Kurusu, Hideki Morikaku
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Patent number: 5744916Abstract: In order to detect a fault which would result in heating or fuming of a discharge tube lighting circuit and to break the lighting circuit, input voltage and current are measured and multiplied to compute the input power. The discharge tube 3 is extinguished when an input power reaches a predetermined value.Type: GrantFiled: October 16, 1995Date of Patent: April 28, 1998Assignee: International Business Machines CorporationInventors: Kenji Kawabata, Shuzo Matsumoto, Ryuichi Ikeda, Motohiro Sugino, Takashi Okada, Yoshiteru Watanabe
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Patent number: 5705920Abstract: A power supply apparatus which stabilizes the output by feeding it back is provided which suppresses variations of the output for abrupt variations of the input. The power supply apparatus comprises output sensing means for sensing output current and output voltage, first output control means for controlling the output with the increment or decrement of the value obtained from said output sensing means, second output control means for controlling the output from an absolute value of the input voltage, and selection means for selecting either said first output control means or said second output control means.Type: GrantFiled: September 27, 1996Date of Patent: January 6, 1998Assignee: International Business Machines CorporationInventors: Yoshiteru Watanabe, Motohiro Sugino, Ryuichi Ikeda, Shuzo Matsumoto, Kenji Kawabata, Takashi Okada
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Patent number: 5686780Abstract: A voltage regulating circuit is provided in a single mold package, which is attached to the case directly or by a heat conductive material such that it is sandwiched between the case of a voltage regulator and a heat sink, conductors which serve as internal wirings and form terminals are insert-molded with the case of the voltage regulator and the brush holder to be superimposed upon the case of the voltage regulator, out of the terminals formed in the conductors, specific terminals on respective sides are aligned, and the brush holder is installed in the case of the voltage regulator in such a manner that they are superimposed upon each other so that electrical connection of these elements is effected.Type: GrantFiled: October 31, 1995Date of Patent: November 11, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Katsumi Adachi, Ryuichi Ikeda, Kyoko Kurusu
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Patent number: 5621281Abstract: A current feedback type discharge lamp lighting device including a switching circuit which switches an impedance of an impedance device in accordance with the number of connected discharge tubes. In the discharge lamp lighting device, a tube current for each of the connected discharge tubes is maintained constant, and the discharge lamp lighting device tends to not be effected by stray capacitance.Type: GrantFiled: June 5, 1995Date of Patent: April 15, 1997Assignees: International Business Machines Corporation, Hitachi, Ltd.Inventors: Kenji Kawabata, Ryuichi Ikeda, Motohiro Sugino, Takashi Okada, Johji Mamiya
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Patent number: 5384516Abstract: An information processing apparatus employs a liquid crystal display and a fluorescent lamp for backlighting the screen of the liquid crystal display. A lighting circuit for supplying alternating current lighting power to the fluorescent lamp receives input power from either a commercial alternating current power source or from a direct current battery. The level of the lighting power supplied to the fluorescent lamp is determined based upon a determination of whether the input power is being supplied from the commercial power source or from the battery.Type: GrantFiled: November 2, 1992Date of Patent: January 24, 1995Assignees: Hitachi, Ltd., Hitachi Microcomputer System, Ltd., Hitachi Video & Information System, Inc.Inventors: Kenji Kawabata, Soichiro Ogawa, Susumu Iijima, Kunio Seki, Hirotaka Mochizuki, Makoto Goto, Ryuichi Ikeda, Motohiro Sugino, Kenichi Onda