Patents by Inventor Daisuke Yasukawa
Daisuke Yasukawa 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: 20120067638Abstract: First and second terminals project from a circuit board and lie adjacent to each other with an interspace formed between the first and second terminals. An electronic apparatus further includes a projecting member projecting along a neighboring terminal which is one of the first and second terminals at such a position that the neighboring terminal is located between the projecting member and the interspace. The projecting member is located at an adjacent position adjacent to the neighboring terminal, to attract molten solder from the interspace toward the projecting member during soldering to join the first and second terminals to the circuit board.Type: ApplicationFiled: September 14, 2011Publication date: March 22, 2012Inventors: Daisuke YASUKAWA, Kazuhiko NAKANO, Hirofumi Watanabe, Atsushi YAMAGUCHI
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Patent number: 8070238Abstract: An electro mechanical brake apparatus is provided, in which a counter-measure for the heat of the driving circuit is much improved when configured to be integrated with an electric circuit. An electric circuit portion is provided by sandwiching a motor with brake pads, and a power module is provided so that a heat dissipating surface is opposed to the inner surface of the metallic outer case of the electric circuit portion, and a control circuit board is disposed at the motor side for the power module.Type: GrantFiled: April 2, 2007Date of Patent: December 6, 2011Assignee: Hitachi, Ltd.Inventors: Daisuke Yasukawa, Kazumoto Sano
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Publication number: 20110259005Abstract: Provided is a brake controller which can be made smaller. The brake controller (100) has a hydraulic control mechanism (150), which comprises a master cylinder (250) which generates a hydraulic fluid pressure on the basis of an input piston (182) and a control piston (190) that move when a braking operation is performed, motors (290, 296), and a moving mechanism (200) which moves the aforementioned control piston as the aforementioned motors turn, and a motor control unit (300) for regulating the turning of the aforementioned motors.Type: ApplicationFiled: November 30, 2009Publication date: October 27, 2011Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kenji Kikuchi, Daisuke Yasukawa, HIrofumi Watanabe, Takuya Obata, Takayuki Ohno
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Publication number: 20110235289Abstract: An electronic controller for a vehicle includes a box-shaped frame having only one opened side that has a notch portion into which an electric connector whose connection port protrudes toward an outside fits and a cover that closes an opening of the frame, in which while a groove filled with a sealant is provided at least on a bonded surface of an electric connector to which the cover is bonded, a first convex portion that fits into the groove is provided in a circumferential portion of the cover. Moreover, the electric connector has a flange portion opposite to an inner wall of the frame around the notch portion, and the flange portion is provided with a second convex portion protruding toward the inner wall to surround the notch portion.Type: ApplicationFiled: March 21, 2011Publication date: September 29, 2011Inventors: Hirofumi WATANABE, Kazuhiko Nakano, Daisuke Yasukawa
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Patent number: 8002090Abstract: The invention provides a brake apparatus in which a vibration resistance and a heat resistance are improved, in a control apparatus of an integrally structured brake in which an electric circuit portion is attached to a brake force generating portion of the brake apparatus. In the control apparatus of the integrally structured brake in which the electric circuit portion is attached to the brake force generating portion of the brake apparatus, the structure is made such that an opening is provided in a circuit side case and a connected portion is arranged in a space within the opening, in order to secure an assured electric connection after attaching the circuit portion. A connecting work can be executed from the opening portion, a vibration resistance can be improved, and a heat resistance can be improved.Type: GrantFiled: January 17, 2007Date of Patent: August 23, 2011Assignee: Hitachi, Ltd.Inventor: Daisuke Yasukawa
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Publication number: 20110155414Abstract: An actuator control device includes a circuit device that is resin-molded by a plurality of metal molds including at least one movable metal mold to include a first bus bar and a second bus bar. The first bus bar and the second bus bar each include a flat plate-like portion that includes two main flat-face portions having large surface areas, and two sub flat-face portions that are adjacent to the main flat-face portions and have smaller surface areas than the surface areas of the main flat-face portions. One of the main flat-face portions of the first bus bar faces one of the main flat-face portions of the second bus bar. The facing direction differs from the mold release direction of the movable metal mold.Type: ApplicationFiled: December 22, 2010Publication date: June 30, 2011Applicant: Hitachi Automotive Systems, Ltd.Inventors: Daisuke YASUKAWA, Hirofumi Watanabe, Kazuhiko Nakano, Kenji Kikuchi
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Publication number: 20090217659Abstract: The present invention relates to an electric booster in which a rotation of an electric motor is converted into a linear motion and transmitted to an output member by a rotation-linear motion mechanism, and the output member pushes a piston of a master cylinder to generate a brake fluid pressure in a pressure chamber in the master cylinder. The present invention is characterized in that an ECU casing containing boards and the like such as a board for controlling the electric motor is coupled to the top of a motor casing constituting the electric motor. The ECU casing is offset in one direction in a plane perpendicular to a plane containing an axis of the master cylinder. A male connector is provided at a side surface of the ECU casing on the opposite side from the offset direction F side, and a space between the male connector and an interference area of the ECU casing with the other components and devices is utilized as a space for attachment/detachment of the male connector to/from the female connector.Type: ApplicationFiled: January 28, 2009Publication date: September 3, 2009Inventors: Takayuki Ohno, Takuya Obata, Daisuke Yasukawa, Hirofumi Watanabe
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Publication number: 20080236963Abstract: The invention achieves a further downsizing of an actuator control unit. The actuator control unit has a control circuit controlling an actuator, and a bus bar electrically connected to the control circuit and arranged such as to be partially embedded in an inner portion of a resin case and be partially exposed to an outer portion of the resin case. It is preferable to have a projection portion extending in a wiring direction of the bus bar between two bus bars wired adjacently, having a greater height than an embedded plane of the bus bar in the resin case, and made of an insulating material.Type: ApplicationFiled: January 23, 2008Publication date: October 2, 2008Applicant: Hitachi, Ltd.Inventors: Daisuke YASUKAWA, Hirofumi Watanabe
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Publication number: 20080091326Abstract: When a caliper and an ECU are separately configured in an electro mechanical brake, the number of harness is increased, and therefore, the wiring layout of the harness becomes difficult, and when bending and twisting are applied to the harness, a problem of a breaking of the wiring and the like arises. Further, a voltage drop is caused by the electric resistance of the harness, and moreover, there is a risk of infiltration of noises. The ECU and the caliper are integrated, thereby making the distance between various sensors and control devices short. Further, the frame body of the ECU incorporates an inverter module driving a motor and its control device, thereby simplifying a wiring connection to the motor.Type: ApplicationFiled: October 15, 2007Publication date: April 17, 2008Applicant: Hitachi, Ltd.Inventors: Hirofumi WATANABE, Takafumi Suzuki, Daisuke Yasukawa
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Publication number: 20070228824Abstract: An electro mechanical brake apparatus is provided, in which a counter-measure for the heat of the driving circuit is much improved when configured to be integrated with an electric circuit. An electric circuit portion is provided by sandwiching a motor with brake pads, and a power module is provided so that a heat dissipating surface is opposed to the inner surface of the metallic outer case of the electric circuit portion, and a control circuit board is disposed at the motor side for the power module.Type: ApplicationFiled: April 2, 2007Publication date: October 4, 2007Applicant: Hitachi, Ltd.Inventors: Daisuke Yasukawa, Kazumoto Sano
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Publication number: 20070199926Abstract: The invention stabilizes a quality of a laser welding in a terminal in which an outer appearance characteristic is not stabilized, and achieves an improvement of a positioning characteristic at a time of executing the laser welding without generating a cost increase. A hole is formed in a terminal of an integrated circuit sealed by a plastic molding. At a time of welding, a welding operation position is positioned by recognizing the hole in accordance with an image recognition, and a laser welding is executed by irradiating a laser beam to a portion of a terminal and a bus bar positioned near an edge portion of the hole. The hole is preferably formed in a circular shape or a similar shape thereto.Type: ApplicationFiled: February 23, 2007Publication date: August 30, 2007Applicant: HITACHI, LTD.Inventors: Hirofumi Watanabe, Daisuke Yasukawa, Masaaki Suzuku
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Publication number: 20070199775Abstract: The invention provides a brake apparatus in which a vibration resistance and a heat resistance are improved, in a control apparatus of an integrally structured brake in which an electric circuit portion is attached to a brake force generating portion of the brake apparatus. In the control apparatus of the integrally structured brake in which the electric circuit portion is attached to the brake force generating portion of the brake apparatus, the structure is made such that an opening is provided in a circuit side case and a connected portion is arranged in a space within the opening, in order to secure an assured electric connection after attaching the circuit portion. A connecting work can be executed from the opening portion, a vibration resistance can be improved, and a heat resistance can be improved.Type: ApplicationFiled: January 17, 2007Publication date: August 30, 2007Applicant: Hitachi, Ltd.Inventor: Daisuke Yasukawa
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Publication number: 20060180365Abstract: Motors are disposed in an unsprung part of the vehicle with reference to a suspension. Drive circuits which rectangular-wave drive the motors are disposed in the unsprung part. Voltage control circuits which control voltage supplied from a battery to the drive circuits are disposed in the sprung part of the vehicle with reference to the suspension. The motors are three-phase synchronous motors.Type: ApplicationFiled: August 25, 2005Publication date: August 17, 2006Applicant: Hitachi Ltd.Inventors: Toshiyuki Innami, Hiroyuki Sato, Yuuzou Kadomukai, Daisuke Yasukawa, Yuichi Kuramochi, Hideki Miyazaki
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Publication number: 20050119010Abstract: A traffic-information providing method includes steps of accepting registration from a terminal to a center concerning ID information for identifying a vehicle, billing both information associated with the ID information and information about a travel route along which the vehicle is scheduled to drive and which includes a toll road, calculating, at the center, future traffic information based on the travel route registered into the center, and providing the calculated future traffic information via a communications line. The traffic amount is predicted based on the travel route which the user has registered. It then becomes possible to provide the fine-grained traffic information.Type: ApplicationFiled: September 29, 2004Publication date: June 2, 2005Inventor: Daisuke Yasukawa