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).
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Publication number: 20240100593Abstract: In a case where an FSSS average particle size of a tungsten-containing powder as obtained by an FSSS method is defined as a (?m) and a density TD, which is an inverse number of a tap volume of the tungsten-containing powder, is defined as p (g/cm3), a relational expression of p?0.37a+7.04 is satisfied when a range of the FSSS average particle size a is 0.5 ?m?a?5.0 ?m.Type: ApplicationFiled: December 8, 2021Publication date: March 28, 2024Applicant: A.L.M.T. Corp.Inventors: Masanori OHNO, Takuya KONO, Fumitaka GAMO, Takayuki FUDO
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Publication number: 20220276117Abstract: This seal state detection device includes a plurality of part case members including a cylinder facing part and a rod facing part and are aligned in a circumferential direction of a cylinder by causing the cylinder facing part to face the cylinder and the rod facing part to face a rod so that a housing chamber for housing a part of the cylinder and a part of the rod is formed between the cylinder facing part and the rod facing part. The cylinder facing part includes a seal part which contacts with the cylinder. The seal part includes a protruding part formed at one end and a recessed part formed at the other end in the circumferential direction of the cylinder. The protruding part and the recessed part are fitted to each other when the plurality of part case members are aligned in the circumferential direction of the cylinder.Type: ApplicationFiled: August 25, 2020Publication date: September 1, 2022Inventors: Takanori ITO, Takayuki OHNO, Masafumi IWAMOTO
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Patent number: 10663719Abstract: 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: GrantFiled: April 14, 2017Date of Patent: May 26, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Hiroshi Yamamoto, Atsushi Ueda, Takayuki Ohno, Atsuo Nakao
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Patent number: 10533624Abstract: 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: GrantFiled: June 13, 2016Date of Patent: January 14, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yu Ishimaru, Naoki Ishibashi, Takayuki Ohno, Makoto Tajima
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Publication number: 20190212548Abstract: 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: ApplicationFiled: April 14, 2017Publication date: July 11, 2019Applicant: SHARP KABUSHIKI KAISHAInventors: HIROSHI YAMAMOTO, ATSUSHI UEDA, TAKAYUKI OHNO, ATSUO NAKAO
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Publication number: 20180195574Abstract: 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: ApplicationFiled: June 13, 2016Publication date: July 12, 2018Inventors: Yu ISHIMARU, Naoki ISHIBASHI, Takayuki OHNO, Makoto TAJIMA
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Patent number: 9394934Abstract: 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: GrantFiled: September 24, 2012Date of Patent: July 19, 2016Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Takayuki Ohno, Makoto Nishimura
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Patent number: 9169888Abstract: 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: GrantFiled: August 13, 2013Date of Patent: October 27, 2015Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Makoto Nishimura, Takayuki Ohno
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Patent number: 9089638Abstract: 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: GrantFiled: September 18, 2007Date of Patent: July 28, 2015Assignee: JMS CO., LTD.Inventors: Takafumi Kiyono, Takayuki Ohno, Takahide Nakanishi, Toru Fukushima, Eiji Sanada
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Patent number: 8959908Abstract: 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: GrantFiled: November 30, 2009Date of Patent: February 24, 2015Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenji Kikuchi, Daisuke Yasukawa, Hirofumi Watanabe, Takuya Obata, Takayuki Ohno
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Publication number: 20140048364Abstract: 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: ApplicationFiled: August 13, 2013Publication date: February 20, 2014Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Makoto NISHIMURA, Takayuki OHNO
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Patent number: 8555634Abstract: 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: GrantFiled: January 31, 2013Date of Patent: October 15, 2013Assignee: Hitachi, Ltd.Inventors: Takayuki Ohno, Takuya Obata, Daisuke Yasukawa, Hirohumi Watanabe
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Patent number: 8506020Abstract: 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: GrantFiled: February 18, 2010Date of Patent: August 13, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kimio Nishino, Toshiyuki Innami, Norikazu Matsuzaki, Masayuki Kikawa, Takuya Obata, Takayuki Ohno
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Patent number: 8387381Abstract: 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: GrantFiled: January 28, 2009Date of Patent: March 5, 2013Assignee: Hitachi, Ltd.Inventors: Takayuki Ohno, Takuya Obata, Daisuke Yasukawa, Hirofumi Watanabe
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Patent number: 8096122Abstract: 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: GrantFiled: December 22, 2008Date of Patent: January 17, 2012Assignee: Hitachi, Ltd.Inventors: Junichi Ikeda, Hirotaka Oikawa, Takayuki Ohno
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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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Patent number: 8011184Abstract: 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: GrantFiled: June 3, 2008Date of Patent: September 6, 2011Assignee: Hitachi, Ltd.Inventors: Yukio Ohtani, Takuya Obata, Takayuki Ohno, Naoki Shirakawa
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Publication number: 20110152027Abstract: 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: ApplicationFiled: September 28, 2010Publication date: June 23, 2011Inventors: Takayuki Ohno, Naoki Shirakawa, Yukio Ohtani, Takuya Usui
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Publication number: 20110025119Abstract: 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: ApplicationFiled: February 18, 2010Publication date: February 3, 2011Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kimio NISHINO, Toshiyuki Innami, Norikazu Matsuzaki, Masayuki Kikawa, Takuya Obata, Takayuki Ohno
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Patent number: 7861522Abstract: 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: GrantFiled: May 28, 2008Date of Patent: January 4, 2011Assignee: Hitachi, Ltd.Inventors: Takuya Obata, Toshio Takayama, Takayuki Ohno, Yukio Ohtani