Patents by Inventor Takayuki Ohno

Takayuki Ohno 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).

  • Patent number: 10663719
    Abstract: An optical scanning device provided with a casing, a plurality of light sources, a deflection scanning unit that deflects and scans light beams from the plurality of light sources onto a plurality of bodies to be scanned, and a plurality of optical units arranged between the deflection scanning unit and the bodies to be scanned, in which optical unit supporting members that support the optical units are provided, the optical unit supporting members support the plurality of optical units arranged at predetermined intervals, and a thermal expansion coefficient of the optical unit supporting members is lower than a thermal expansion coefficient of the casing.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: May 26, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Yamamoto, Atsushi Ueda, Takayuki Ohno, Atsuo Nakao
  • Patent number: 10533624
    Abstract: A stopper mechanism includes a second cylinder provided at an end portion in an inner cylinder, and a second piston configured to move along with movement of a piston rod to be capable of being fit-inserted through the second cylinder. The second piston includes a stopper coupled to the piston rod, a castle integrated with the stopper by plastic flow to form a ring groove on an outer periphery of the second piston between the castle and the stopper, and a piston ring fixed into a ring groove formed by the stopper and the castle so that the piston ring is displaceable in the ring groove in an axial direction and is retained in the ring groove, and has an annular shape with both ends in a circumferential direction which are formed by partially cutting the piston ring.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: January 14, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yu Ishimaru, Naoki Ishibashi, Takayuki Ohno, Makoto Tajima
  • Publication number: 20190212548
    Abstract: An optical scanning device provided with a casing, a plurality of light sources, a deflection scanning unit that deflects and scans light beams from the plurality of light sources onto a plurality of bodies to be scanned, and a plurality of optical units arranged between the deflection scanning unit and the bodies to be scanned, in which optical unit supporting members that support the optical units are provided, the optical unit supporting members support the plurality of optical units arranged at predetermined intervals, and a thermal expansion coefficient of the optical unit supporting members is lower than a thermal expansion coefficient of the casing.
    Type: Application
    Filed: April 14, 2017
    Publication date: July 11, 2019
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: HIROSHI YAMAMOTO, ATSUSHI UEDA, TAKAYUKI OHNO, ATSUO NAKAO
  • Publication number: 20180195574
    Abstract: A stopper mechanism includes a second cylinder provided at an end portion in an inner cylinder, and a second piston configured to move along with movement of a piston rod to be capable of being fit-inserted through the second cylinder. The second piston includes a stopper coupled to the piston rod, a castle integrated with the stopper by plastic flow to form a ring groove on an outer periphery of the second piston between the castle and the stopper, and a piston ring fixed into a ring groove formed by the stopper and the castle so that the piston ring is displaceable in the ring groove in an axial direction and is retained in the ring groove, and has an annular shape with both ends in a circumferential direction which are formed by partially cutting the piston ring.
    Type: Application
    Filed: June 13, 2016
    Publication date: July 12, 2018
    Inventors: Yu ISHIMARU, Naoki ISHIBASHI, Takayuki OHNO, Makoto TAJIMA
  • Patent number: 9394934
    Abstract: A fastening method for fastening a nut to a bolt by screwing includes preparing a nut including a tool mounting portion formed on a seat surface, and an annular thin portion formed on the tool mounting portion opposite to the seat surface, swaging a plurality of places of the thin portion with punches from an outer circumferential direction, and flowing a thickness of the thin portion so as to extend to a front end of the bolt partially in a circumferential direction to be closely adhered to a screw portion of the bolt.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: July 19, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takayuki Ohno, Makoto Nishimura
  • Patent number: 9169888
    Abstract: A shock absorber includes a cylinder sealingly containing oil, and a piston coupled with a piston rod and inserted in the cylinder. The shock absorber generates a damping force by controlling an oil flow generated according to a movement of the piston with use of a damping force generation mechanism. A separator tube is externally disposed around the cylinder. The oil is transmitted into the damping force generation mechanism via a branch tube integrally formed on a cylindrical sidewall of the separator tube. The branch tube is formed on the cylindrical sidewall of the separator tube by burring processing. Both sides of a proximal portion of the branch tube in a circumferential direction of the cylindrical sidewall of the separator tube are pressed from an interior to concave an inner circumferential surface radially outwardly, thereby forming recesses.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: October 27, 2015
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Makoto Nishimura, Takayuki Ohno
  • Patent number: 9089638
    Abstract: A medical needle device includes a hub having an injection needle fixed at a top end thereof, and a substantially cylindrical sheath which is fit on the hub and having a pair of wings mounted on both sides thereof. The pair of wings are bent along the both sides of the sheath, overlapped and held together at a time of puncturing so that an inner peripheral surface of the sheath strongly presses an outer peripheral surface of the hub, thereby preventing movement of the hub caused by transfer of the hub relative to the sheath both in a rotational direction and a longitudinal direction. sheath has a plurality of protrusions provided on the inner peripheral surface thereof in a circumferential direction, the protrusions being spaced out from each other; and the outer peripheral surface of the hub abuts the protrusions.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: July 28, 2015
    Assignee: JMS CO., LTD.
    Inventors: Takafumi Kiyono, Takayuki Ohno, Takahide Nakanishi, Toru Fukushima, Eiji Sanada
  • Patent number: 8959908
    Abstract: 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: Grant
    Filed: November 30, 2009
    Date of Patent: February 24, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kenji Kikuchi, Daisuke Yasukawa, Hirofumi Watanabe, Takuya Obata, Takayuki Ohno
  • Publication number: 20140048364
    Abstract: A shock absorber includes a cylinder sealingly containing oil, and a piston coupled with a piston rod and inserted in the cylinder. The shock absorber generates a damping force by controlling the oil flow generated according to movement of the piston with the use of a damping force generation mechanism. A separator tube is externally disposed around the cylinder. The oil is transmitted into the damping force generation mechanism via a branch tube integrally formed on a cylindrical sidewall of the separator tube. Both sides of a proximal portion of the branch tube in a circumferential direction of the sidewall of the separator tube are pressed from an inside to concave an inner circumferential surface radially outwardly, thereby forming recesses.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 20, 2014
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Makoto NISHIMURA, Takayuki OHNO
  • Patent number: 8555634
    Abstract: An electric booster in which a rotation of an electric motor is converted into linear motion and transmitted to an output member by a rotation-linear motion mechanism. The output member pushes a piston of a master cylinder to generate brake fluid pressure in a pressure chamber in the master cylinder. An ECU casing containing boards 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 side, and a space between the male connector and an interference area of the ECU casing is utilized as a space for attachment/detachment of the male connector.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: October 15, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Ohno, Takuya Obata, Daisuke Yasukawa, Hirohumi Watanabe
  • Patent number: 8506020
    Abstract: A brake control system that enables accurate brake control is provided that precisely detects a master-cylinder pressure and includes a back-up function. The brake control system includes a master-cylinder operated by a brake operation of a driver; a first mechanism that regulates a pressure inside the master-cylinder according to the brake operation amount; a first control apparatus that controls operation of the first mechanism; a second mechanism that regulates communication of the pressure inside the master-cylinder to a wheel-cylinder; and a second control apparatus that controls operation of the second mechanism and operation of a pump apparatus that increases a pressure communicated to the wheel-cylinder. The first and second control apparatuses each have a power supply circuit and CPU.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: August 13, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kimio Nishino, Toshiyuki Innami, Norikazu Matsuzaki, Masayuki Kikawa, Takuya Obata, Takayuki Ohno
  • Patent number: 8387381
    Abstract: 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: Grant
    Filed: January 28, 2009
    Date of Patent: March 5, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Ohno, Takuya Obata, Daisuke Yasukawa, Hirofumi Watanabe
  • Patent number: 8096122
    Abstract: An electric booster according to the present invention comprises a booster piston disposed around an input piston so as to movable relative to the input piston. The booster piston and input piston also serve as a primacy piston of a tandem master cylinder. A brake fluid pressure is generated in the tandem master cylinder by an input thrust force provided from a brake pedal to the input piston and a booster thrust force provided from the electronic actuator to the booster piston. In this electric booster, a slide hole is formed through the secondary piston of the tamed master cylinder in the axial direction therefore, and a rod member is slidably disposed through the slide hole. When the fluid pressure is not increased in the primary pressure chamber, due to the fluid pressure in the secondary pressure chamber, the rod member comes to abut against the input piston, and a reactive force in the secondary pressure chamber is returned to the brake pedal.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: January 17, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Junichi Ikeda, Hirotaka Oikawa, Takayuki Ohno
  • Publication number: 20110259005
    Abstract: 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: Application
    Filed: November 30, 2009
    Publication date: October 27, 2011
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Kenji Kikuchi, Daisuke Yasukawa, HIrofumi Watanabe, Takuya Obata, Takayuki Ohno
  • Patent number: 8011184
    Abstract: An electric booster which drives an electric motor (40) in response to a movement of an input member (9) moving together with a brake pedal (B), and generates a brake hydraulic pressure in a master cylinder (10) through a ball screw mechanism (50). The electric motor (40) includes a stator (41) having a coil therein, a rotor (42) which rotates by applying current to the stator (41), and an annular motor casing (2) containing the stator (41) and the rotor (42). The ball screw mechanism (50) is fittedly disposed in the rotor (42). An opening (3b) on one axial end side of the motor casing (2) has a larger diameter than an outer diameter of the ball screw mechanism (50). In manufacturing, after the electric motor (40) alone is tested, the ball screw mechanism (50) is inserted through the opening (3b) and installed without the need of disassembling the motor casing (2).
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: September 6, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yukio Ohtani, Takuya Obata, Takayuki Ohno, Naoki Shirakawa
  • Publication number: 20110152027
    Abstract: In an electric booster according to one embodiment of the present invention, a brake pedal is connected to a sun gear of a differential transmission mechanism corresponding to a planetary gear mechanism. An electric motor is connected to a ring gear, and an output rod is connected to a planetary carrier, and the output rod is connected to a piston of a master cylinder. When the brake pedal is operated to rotate the sun gear, planetary pinions rotate and revolve around the sun gear. As a result, the planetary carrier rotates to move the output rod forward to push the piston. As a result, a hydraulic pressure is generated in the master cylinder. At this time, the electric motor is controlled according to the rotation of the sun gear to rotate the ring gear so that the ring gear follows the sun gear. In this manner, a servo force of the electric motor is applied to the rotation of the planetary carrier.
    Type: Application
    Filed: September 28, 2010
    Publication date: June 23, 2011
    Inventors: Takayuki Ohno, Naoki Shirakawa, Yukio Ohtani, Takuya Usui
  • Publication number: 20110025119
    Abstract: A brake control system that enables accurate brake control is provided that precisely detects a master-cylinder pressure and includes a back-up function. The brake control system includes a master-cylinder operated by a brake operation of a driver; a first mechanism that regulates a pressure inside the master-cylinder according to the brake operation amount; a first control apparatus that controls operation of the first mechanism; a second mechanism that regulates communication of the pressure inside the master-cylinder to a wheel-cylinder; and a second control apparatus that controls operation of the second mechanism and operation of a pump apparatus that increases a pressure communicated to the wheel-cylinder. The first and second control apparatuses each have a power supply circuit and CPU.
    Type: Application
    Filed: February 18, 2010
    Publication date: February 3, 2011
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Kimio NISHINO, Toshiyuki Innami, Norikazu Matsuzaki, Masayuki Kikawa, Takuya Obata, Takayuki Ohno
  • Patent number: 7861522
    Abstract: The present invention relates to an electrically driven brake booster in which boost control is performed as follows; when an input piston is displaced forward by an input rod upon an operation of a brake pedal, an electric motor is operated according to the input, and a primary piston is displaced forward by a ball-screw mechanism, and then a primary and secondary pressure chamber in a master cylinder main body are pressurized. A first seal and a second seal are disposed at a seal portion between the primary piston and the input piston. A portion between the first seal and the second seal is in communication with an outside through a discharge passage. Brake fluid which leaks from the first seal is sealed off by the second seal, and is discharged to the outside through the discharge passage, whereby it becomes possible to prevent that the electric motor and the ball-screw mechanism otherwise might be corroded by the leaking brake fluid.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: January 4, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Takuya Obata, Toshio Takayama, Takayuki Ohno, Yukio Ohtani
  • Publication number: 20100326072
    Abstract: An input rod and an input piston are advanced in response to an operation of a brake pedal, and an electric motor is driven according to the movement of the input piston to push a primary piston forward in a master cylinder through a ball-screw mechanism, thereby generating desired hydraulic pressures in a primary chamber and a secondary chamber and supplying the hydraulic pressure to the brake caliper of each wheel. At this time, a part of the hydraulic pressure in the primary chamber is received by the input piston to feed back to the brake pedal a part of the reaction force of hydraulic pressure during braking. A retainer of a spring assembly interposed between the primary and secondary pistons has a hollow structure to insert therein the forward end portion of the input piston, thereby allowing a reduction in the axial length of the primary piston.
    Type: Application
    Filed: June 28, 2010
    Publication date: December 30, 2010
    Inventors: Hideaki ISHII, Takayuki Ohno
  • Patent number: 7791633
    Abstract: An optical scanning unit irradiates a polygon mirror with a plurality of light beams emitted from a light source according to image data, and scans and exposes a plurality of photoreceptors with the plurality of light beams as scanning lights. The optical scanning unit comprises a primary optical system unit including an optical system that emits the plurality of light beams, which are emitted from the light source toward the polygon mirror, and a secondary optical system unit including an optical system that emits the light beams, which are reflected by the polygon mirror toward the photoreceptors. The arrangement is such that the primary optical system unit is fitted removably to the secondary optical system unit, and that a combined unit of the primary optical system unit and the secondary optical system unit is removably fitted to an image forming apparatus having the photoreceptors.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: September 7, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takasumi Wada, Takayuki Ohno, Yasuhiro Ono, Ayumu Oda, Takahisa Narikiyo