Patents by Inventor Yoshiki Sakamoto
Yoshiki Sakamoto 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: 20140099227Abstract: A pump apparatus includes: a housing; a pump unit; a suction passage; a discharge passage member including a discharge hydraulic passage which is formed therein, and which is arranged to discharge the hydraulic fluid pressurized by the pump unit to an outside of the housing; a first discharge passage insertion hole which is formed in the pump unit, and into which the discharge passage member is inserted through an elastic member; a second discharge passage insertion hole which is formed in the housing, and into which the discharge passage member is inserted through an elastic member; and an axial position adjusting mechanism arranged to adjust an axial position of the discharge passage member within the first discharge passage insertion hole and the second discharge passage insertion hole.Type: ApplicationFiled: July 9, 2013Publication date: April 10, 2014Inventors: Hideaki TAKAHASHI, Yoshiki SAKAMOTO
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Patent number: 8684473Abstract: A gear pump includes: a drive shaft; a first gear; a second gear; a first plate disposed between the first gear and the second gear, and arranged to liquid-tightly seal the first surfaces of the first and second gear; a pair of second plates disposed, respectively, on the second surfaces of the first and second gears, and arranged to liquid-tightly seal the second surfaces of the first and second gears, each of the second plates including a tooth top sealing portion having a seal surface arranged to seal a tooth top of the first gear and a tooth top of the second gear, and to form a suction portion with the first plate and the second plate; and an urging member arranged to urge the drive shaft toward the seal surface of the tooth top sealing portion of one of the first and second plates.Type: GrantFiled: March 19, 2010Date of Patent: April 1, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Chiharu Nakazawa, Yoshiki Sakamoto, Ryohei Maruo, Toshihiro Koizumi
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Publication number: 20140076429Abstract: A pump apparatus including a discharge valve including a case member, a valve body within the case member, a seat member having a concaved valve seat, a retainer serving to retain the valve body on the valve seat on a side of one end of the retainer, an elastic member disposed on a side of the other end of the retainer, the elastic member serving to apply a biasing force to the valve body toward the seat member, and a guide portion formed on the retainer, the guide portion serving to guide the retainer relative to the case member when the valve body is moved to an open position, the guide portion being disposed on a radial outside of the elastic member or a radial inside thereof and overlapped with the elastic member in an axial direction thereof.Type: ApplicationFiled: September 3, 2013Publication date: March 20, 2014Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: YOHEI MASUI, HIDEAKI TAKAHASHI, YOSHIKI SAKAMOTO, TADAHARU YOKOTA
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Patent number: 8586214Abstract: A cutting tool with excellent resistance to adhesion and wear. The cutting tool has a cutting edge on the intersecting ridge line of the rake face and the flank face, and is covered on the surface of the base thereof by a coating layer comprising TiaAlbNbdMe(C1-xNx). M is at least one selected from Si, W, Mo, Ta, Hf, Cr, Zr, and Y, with the content ranges 0.3?a?0.8, 0?b?0.6, 0.01?d?0.25, 0?e?0.25, a+b+d+e=1, and 0?x?1). Droplets provided on the surface of the coating layer have a higher Nb content ratio on the rake face compared to the flank face.Type: GrantFiled: March 28, 2011Date of Patent: November 19, 2013Assignee: Kyocera CorporationInventors: Yoshiki Sakamoto, Masahiro Waki
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Patent number: 8540496Abstract: A fan apparatus is provided and includes: a housing having a hollow cylindrical shape; a circuit board holding structure which is disposed in the housing so as to be located at the radially central part of the housing and which includes a plurality of slits extending axially; a circuit board disposed inside the circuit board holding structure in parallel with the axial direction; a plurality of fixed blades disposed so as to bridge between the housing and the circuit board holding structure; and a motor which includes a rotary shaft and an impeller and which is disposed at the front end of the circuit board holding structure, wherein the impeller is connected to the rotary shaft so as to move air.Type: GrantFiled: February 19, 2010Date of Patent: September 24, 2013Assignee: Minebea Co., Ltd.Inventors: Yuzuru Suzuki, Yuuki Takahashi, Yoshiki Sakamoto
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Publication number: 20130022419Abstract: A cutting tool with excellent resistance to adhesion and wear. The cutting tool has a cutting edge on the intersecting ridge line of the rake face and the flank face, and is covered on the surface of the base thereof by a coating layer comprising TiaAlbNbdMe(C1-xNx). M is at least one selected from Si, W, Mo, Ta, Hf, Cr, Zr, and Y, with the content ranges 0.3?a?0.8, 0?b?0.6, 0.01?d?0.25, 0?e?0.25, a+b+d+e=1, and 0?x?1). Droplets provided on the surface of the coating layer have a higher Nb content ratio on the rake face compared to the flank face.Type: ApplicationFiled: March 28, 2011Publication date: January 24, 2013Applicant: Kyocera CorporationInventors: Yoshiki Sakamoto, Masahiro Waki
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Publication number: 20120249127Abstract: A VR resolver 120 and an MR sensor 114 are mounted to a shaft 103. The VR resolver 120 and the MR sensor 114 are formed so as to have a shaft angle multiplier of not less than 2. The difference of the shaft angle multiplier between the VR resolver 120 and the MR sensor 114 is made to be 1. An absolute angle of the shaft 103 is calculated based on a difference between an angle calculated from an output of the VR resolver 120 and an angle calculated from an output of the MR sensor 114. Since the VR resolver 120 and the MR sensor 114 have a different failure mode, redundancy against failure is reliably obtained.Type: ApplicationFiled: February 15, 2012Publication date: October 4, 2012Applicant: MINEBEA CO., LTD.Inventors: Yoshiki SAKAMOTO, Wataru NOGAMIDA
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Patent number: 8159098Abstract: A motor control apparatus including: a motor including a rotating member and a stator; a housing member including a motor housing portion and a power system substrate housing portion, the motor housing portion enclosing the motor and extending in an axial direction of the rotating member, the power system substrate housing portion being integrally formed with the motor housing portion and being located is radially outside of the motor; a control system board supporting a component of a control circuit to control the motor, and including a first board portion facing the motor in the axial direction, and a second board portion extending radially from the first board portion; and a power system substrate supporting a component of a power supply circuit to supply power to the motor, the power system substrate being provided in the power system substrate housing portion.Type: GrantFiled: July 8, 2011Date of Patent: April 17, 2012Assignee: Hitachi, Ltd.Inventors: Kohtaro Shiino, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
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Publication number: 20110266928Abstract: A motor control apparatus including: a motor including a rotating member and a stator; a housing member including a motor housing portion and a power system substrate housing portion, the motor housing portion enclosing the motor and extending in an axial direction of the rotating member, the power system substrate housing portion being integrally formed with the motor housing portion and being located is radially outside of the motor; a control system board supporting a component of a control circuit to control the motor, and including a first board portion facing the motor in the axial direction, and a second board portion extending radially from the first board portion; and a power system substrate supporting a component of a power supply circuit to supply power to the motor, the power system substrate being provided in the power system substrate housing portion.Type: ApplicationFiled: July 8, 2011Publication date: November 3, 2011Inventors: Kohtaro SHIINO, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
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Patent number: 7982347Abstract: An electric power steering apparatus including: a power system board which is received in a housing, which supports a component of a power supply circuit to supply power to a motor; a control system board which is received in the housing, which supports a component of a control circuit to control the motor, and which extends radially with respect to an axis of the motor output shaft; a rotation sensor which is provided in the housing, which is located, in an axial direction of a motor output shaft, between the motor and the control system board, and which is arranged to sense a rotational position of the motor output shaft; and an output terminal which is provided with the rotation sensor, which is connected electrically with the control system board to supply a rotational position signal of the rotation sensor to the control circuit.Type: GrantFiled: January 25, 2010Date of Patent: July 19, 2011Assignee: Hitachi, Ltd.Inventors: Kohtaro Shiino, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
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Publication number: 20100237689Abstract: A gear pump includes: a drive shaft; a first gear; a second gear; a first plate disposed between the first gear and the second gear, and arranged to liquid-tightly seal the first surfaces of the first and second gear; a pair of second plates disposed, respectively, on the second surfaces of the first and second gears, and arranged to liquid-tightly seal the second surfaces of the first and second gears, each of the second plates including a tooth top sealing portion having a seal surface arranged to seal a tooth top of the first gear and a tooth top of the second gear, and to form a suction portion with the first plate and the second plate; and an urging member arranged to urge the drive shaft toward the seal surface of the tooth top sealing portion of one of the first and second plates.Type: ApplicationFiled: March 19, 2010Publication date: September 23, 2010Inventors: Chiharu NAKAZAWA, Yoshiki Sakamoto, Ryohei Maruo, Toshihiro Koizumi
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Publication number: 20100215527Abstract: A fan apparatus is provided and includes: a housing having a hollow cylindrical shape; a circuit board holding structure which is disposed in the housing so as to be located at the radially central part of the housing and which includes a plurality of slits extending axially; a circuit board disposed inside the circuit board holding structure in parallel with the axial direction; a plurality of fixed blades disposed so as to bridge between the housing and the circuit board holding structure; and a motor which includes a rotary shaft and an impeller and which is disposed at the front end of the circuit board holding structure, wherein the impeller is connected to the rotary shaft so as to move air.Type: ApplicationFiled: February 19, 2010Publication date: August 26, 2010Inventors: Yuzuru Suzuki, Yuuki Takahashi, Yoshiki Sakamoto
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Publication number: 20100126794Abstract: An electric power steering apparatus including: a power system board which is received in a housing, which supports a component of a power supply circuit to supply power to a motor; a control system board which is received in the housing, which supports a component of a control circuit to control the motor, and which extends radially with respect to an axis of the motor output shaft; a rotation sensor which is provided in the housing, which is located, in an axial direction of a motor output shaft, between the motor and the control system board, and which is arranged to sense a rotational position of the motor output shaft; and an output terminal which is provided with the rotation sensor, which is connected electrically with the control system board to supply a rotational position signal of the rotation sensor to the control circuit.Type: ApplicationFiled: January 25, 2010Publication date: May 27, 2010Inventors: Kohtaro SHIINO, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
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Publication number: 20100061872Abstract: A gear pump includes a drive shaft, a rotatable pump element mounted on the drive shaft, a side wall member disposed on one side of the pump element, and formed with a shaft hole through which the drive shaft extends, and a side plate disposed on the other side of the pump element. The gear pump further includes a connecting section connecting the drive shaft with the pump element in a manner to prevent relative rotation and to allow relative axial movement between the drive shaft and the pump element. The connecting section includes a drive recess formed in the pump element, and a drive projection projecting radially outwards from the drive shaft, and engaging in the drive recess to prevent the relative rotation. The drive projection is arranged to limit the axial movement of the drive shaft relative to the pump element with one of the side wall member and the side plate.Type: ApplicationFiled: September 4, 2009Publication date: March 11, 2010Applicant: Hitachi Automotive Systems, Ltd.Inventors: Yoshiki SAKAMOTO, Chiharu NAKAZAWA
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Patent number: 7663273Abstract: A motor control apparatus includes a motor, and a control system board supporting a control circuit to control the motor. The apparatus may further include a power system board supporting a power supply circuit to supply power to the motor. The control system board includes a first board portion facing in a direction along a rotation axis of the motor, and a second board portion extending radially from the first board portion.Type: GrantFiled: November 18, 2005Date of Patent: February 16, 2010Assignee: Hitachi, Ltd.Inventors: Kohtaro Shiino, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
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Patent number: 7457105Abstract: A vacuum switchgear system, which comprises a plurality of vacuum switchgears each comprising a vacuum container for accommodating the desired number of vacuum switches selected from a disconnecting switch or load break switch, an earth switch and an vacuum circuit breaker. Each of the vacuum switches has connecting terminals. The switchgears constitute different types of switchgears, the switchgears being classified into the power receiving side and power distribution side. The switchgears are connected with the adjoining switchgear or an element selected from an arrester and a PCT by means of an insulated connecting conductor having terminals around both ends thereof. The terminals are electrically connectable with and detachable from the connecting terminals of the switchgears.Type: GrantFiled: December 23, 2004Date of Patent: November 25, 2008Assignee: Hitachi, Ltd.Inventors: Shuuichi Kikukawa, Kenji Tsuchiya, Satoru Kajiwara, Masato Kobayashi, Yoshiki Sakamoto
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Publication number: 20070194622Abstract: A brake control apparatus includes a master cylinder, wheel cylinders provided for each vehicle wheel, first and second hydraulic actuators provided separately from the master cylinder and adjusting a hydraulic pressure of the wheel cylinder. The first and second hydraulic actuators respectively have first and second hydraulic pressure sources and each have a wheel cylinder system. The first hydraulic actuator adjusts the hydraulic pressure of the wheel cylinder belonging to the one wheel cylinder system between the wheel cylinders by the first hydraulic pressure source. The second hydraulic actuator adjusts the hydraulic pressure of the wheel cylinder belonging to the other wheel cylinder system than the above wheel cylinder system by the second hydraulic pressure source.Type: ApplicationFiled: February 16, 2007Publication date: August 23, 2007Inventors: Chiharu NAKAZAWA, Yoshiki Sakamoto, Takayuki Furuya, Hitoshi Kobayashi, Toshiya Oosawa, Toshiyuki Innami
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Publication number: 20060108884Abstract: A motor control apparatus includes a motor, and a control system board supporting a control circuit to control the motor. The apparatus may further include a power system board supporting a power supply circuit to supply power to the motor. The control system board includes a first board portion facing in a direction along a rotation axis of the motor, and a second board portion extending radially from the first board portion.Type: ApplicationFiled: November 18, 2005Publication date: May 25, 2006Inventors: Kohtaro Shiino, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
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Publication number: 20050141176Abstract: A vacuum switchgear system, which comprises a plurality of vacuum switchgears each comprising a vacuum container for accommodating the desired number of vacuum switches selected from a disconnecting switch or load break switch, an earth switch and an vacuum circuit breaker. Each of the vacuum switches has connecting terminals. The switchgears constitute different types of switchgears, the switchgears being classified into the power receiving side and power distribution side. The switchgears are connected with the adjoining switchgear or an element selected from an arrester and a PCT by means of an insulated connecting conductor having terminals around both ends thereof. The terminals are electrically connectable with and detachable from the connecting terminals of the switchgears.Type: ApplicationFiled: December 23, 2004Publication date: June 30, 2005Inventors: Shuuichi Kikukawa, Kenji Tsuchiya, Satoru Kajiwara, Masato Kobayashi, Yoshiki Sakamoto
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Publication number: 20050139579Abstract: A vacuum switchgear system for a three phase electric power system, wherein a switchgear comprises a vacuum switch comprising a vacuum container and switches accommodated in the vacuum switch and an operation unit. Each of the switches and each of the operation units is coaxially connected with an operating rod of each of the switches. A link mechanism of the operation unit is connected with a link of the adjoining operation units of the switchgears. Each of the link mechanisms transmits a force of the driving rod assisted by an electro-magnet to the adjoining driving rods through the link mechanisms so that the operation units and the switches in the same phase and the same vacuum container are operated in synchronism in response to a switch-on signal or a switch-off signal.Type: ApplicationFiled: December 23, 2004Publication date: June 30, 2005Inventors: Yoshiki Sakamoto, Kenji Tsuchiya, Masato Kobayashi, Shuuichi Kikukawa, Kozo Kato