Patents by Inventor Hiroyasu Nishikawa

Hiroyasu Nishikawa 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: 10274047
    Abstract: In a planetary gear device including: a sun gear; a plurality of planet gears; a ring gear; and a tubular support member connected to the ring gear so as to rotate together with the ring gear; an outward flange provided at the ring gear and projecting radially outward and extend over an entire periphery thereof; an wavy inward flange provided at the tubular support member and having a plurality of projection pieces projecting radially inward over an entire periphery thereof, the outward flange and the inward flange are fastened to each other by means of bolts and nuts, and the inward flange has a plurality of recesses formed between the plurality of projection pieces and the plurality of recesses include shallow first recesses and second recesses deeper than the first recesses such that depth of the recesses becomes greater at regular intervals.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: April 30, 2019
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Tetsuya Matsuoka, Hiroyasu Nishikawa, Takahiko Banno, Masato Asahara, Kazuhiro Sato
  • Patent number: 10259538
    Abstract: A liquefied gas tank installed in a surrounding structural body includes: a tank main body in which a liquefied gas is storable, the tank main body including a plurality of planar portions and corner portions between the planar portions, the corner portions having less rigidity than that of the planar portions; a bottom supporting body that supports the tank main body from below the tank main body; and a plurality of side supporting bodies that support the tank main body from side of the tank main body. The tank main body is configured to stand by itself by being supported by the bottom supporting body when the tank main body stores no cargo, and be supported by the bottom supporting body and the side supporting bodies when the liquefied gas is stored in the tank main body.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: April 16, 2019
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi Sano, Naruyoshi Izumi, Yukichi Takaoka, Toshifumi Fukasawa, Hiroyasu Nishikawa, Hideki Kumamoto, Hiroaki Mori
  • Publication number: 20180038448
    Abstract: In a planetary gear device including: a sun gear; a plurality of planet gears; a ring gear; and a tubular support member connected to the ring gear so as to rotate together with the ring gear; an outward flange provided at the ring gear and projecting radially outward and extend over an entire periphery thereof; an wavy inward flange provided at the tubular support member and having a plurality of projection pieces projecting radially inward over an entire periphery thereof, the outward flange and the inward flange are fastened to each other by means of bolts and nuts, and the inward flange has a plurality of recesses formed between the plurality of projection pieces and the plurality of recesses include shallow first recesses and second recesses deeper than the first recesses such that depth of the recesses becomes greater at regular intervals.
    Type: Application
    Filed: September 27, 2017
    Publication date: February 8, 2018
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Tetsuya MATSUOKA, Hiroyasu NISHIKAWA, Takahiko BANNO, Masato ASAHARA, Kazuhiro SATO
  • Patent number: 9726062
    Abstract: An engine device in which an exhaust gas purification device can be disposed without substantially increasing mounting width dimensions (height, lateral width, front and rear width) of an engine. The engine device includes the exhaust gas purification device connected to an exhaust manifold of the engine, an oil pan disposed on a bottom of the engine, a support body for linking the exhaust gas purification device to the oil pan, so that the exhaust gas purification device is supported by the oil pan.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 8, 2017
    Assignee: Yanmar Co., Ltd.
    Inventors: Shinji Nishimura, Taichi Togashi, Hiroyasu Nishikawa
  • Publication number: 20160280335
    Abstract: A liquefied gas tank installed in a surrounding structural body includes: a tank main body in which a liquefied gas is storable, the tank main body including a plurality of planar portions and corner portions between the planar portions, the corner portions having less rigidity than that of the planar portions; a bottom supporting body that supports the tank main body from below the tank main body; and a plurality of side supporting bodies that support the tank main body from side of the tank main body. The tank main body is configured to stand by itself by being supported by the bottom supporting body when the tank main body stores no cargo, and be supported by the bottom supporting body and the side supporting bodies when the liquefied gas is stored in the tank main body.
    Type: Application
    Filed: November 5, 2014
    Publication date: September 29, 2016
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi SANO, Naruyoshi IZUMI, Yukichi TAKAOKA, Toshifumi FUKASAWA, Hiroyasu NISHIKAWA, Hideki KUMAMOTO, Hiroaki MORI
  • Patent number: 9309649
    Abstract: A work machine equipped with an automatic hammering function is capable of preventing breakage of the hammer caused by blank firing. Hydraulic oil fed to a hydraulic breaker at the distal end of a work machine is controlled by first and second spools. Operating an operation lever so as to contract single rod type boom cylinders to press the hydraulic breaker against an object to be crushed. Head-side pressure and rod-side pressure of the boom cylinders are respectively detected by pressure sensors. Any one of switches is used to switch the mode of automatic hammering operation between an automatic hammering inhibiting mode and an automatic hammering authorizing mode. In the automatic hammering authorizing mode, a controller controls the first and second spools of the hydraulic breaker so as to open them only when head-side pressure and rod-side pressure of the boom cylinders are in a given range of pressing force.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: April 12, 2016
    Assignee: Caterpillar SARL
    Inventors: Hiroyasu Nishikawa, Sei Shimahara, Manabu Nakanishi, Masashi Shibata
  • Publication number: 20150226101
    Abstract: An engine device in which an exhaust gas purification device can be disposed without substantially increasing mounting width dimensions (height, lateral width, front and rear width) of an engine. The engine device includes the exhaust gas purification device connected to an exhaust manifold of the engine, an oil pan disposed on a bottom of the engine, a support body for linking the exhaust gas purification device to the oil pan, so that the exhaust gas purification device is supported by the oil pan.
    Type: Application
    Filed: September 14, 2012
    Publication date: August 13, 2015
    Inventors: Shinji Nishimura, Taichi Togashi, Hiroyasu Nishikawa
  • Patent number: 9103095
    Abstract: A controller controls the solenoid-operated variable pressure relief valves that are provided to control, at set pressures that can be electrically commanded, pressure of hydraulic oil fed to an attachment cylinder. The controller is provided with a control logic that is capable of controlling the aforementioned solenoid-operated variable pressure relief valves. The control logic performs the aforementioned calculation by compensating for pressure override characteristics of each solenoid-operated variable pressure relief valve based on input signals related to the set relief pressure for and a relief valve passing flow rate of the solenoid-operated variable pressure relief valve, and outputting to the solenoid-operated variable pressure relief valve command signals related to the adjusted set relief pressure resulting from the compensation of the pressure override characteristics.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: August 11, 2015
    Assignee: Caterpillar SARL
    Inventors: Hiroyasu Nishikawa, Sei Shimahara, Manabu Nakanishi, Masashi Shibata
  • Patent number: 9051904
    Abstract: An engine includes an EGR apparatus which refluxes a portion of exhaust gas from an exhaust manifold to an intake manifold as EGR gas. A differential pressure sensor detects a differential pressure between intake pressure of the intake manifold and exhaust pressure in the exhaust manifold. The differential pressure sensor is mounted on a head cover which covers an upper portion of a cylinder head. An intake pressure taking-out passage which is in communication with the intake manifold is formed in the cylinder head. An intake pressure introducing passage which is connected to the differential pressure sensor is formed in the head cover. The intake pressure taking-out passage and the intake pressure introducing passage are in communication with each other.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: June 9, 2015
    Assignee: Yanmar Co., Ltd.
    Inventor: Hiroyasu Nishikawa
  • Patent number: 8968148
    Abstract: Provided is a planetary gear reducer including: a sun gear fixed concentrically to a power input shaft; a plurality of planet gears meshing with the sun gear; a ring gear meshing with the planet gears; a planet carrier configured to support a plurality of planet shafts, each of which is a rotational axis of a corresponding one of the planet gear, and to output revolution of the plurality of planet gears as first power; and a cylindrical support connected to the ring gear, non-rotatable relative to the ring gear, and configured to output rotation of the ring gear as second power. The cylindrical support includes, at one part along the direction of a central axis, a flexible structure which is curved radially inward and has a V-shaped longitudinal section. This configuration improves rigidity and prevents misalignment without increasing the weight of the gear reducer.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: March 3, 2015
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Tetsuya Matsuoka, Hiroyasu Nishikawa, Kazuhiro Sato, Hideyuki Imai, Tatsuhiko Goi
  • Patent number: 8899035
    Abstract: A hydraulic pump driven by an engine, a hydraulic actuator, and a negative control circuit are provided on an open center hydraulic circuit, for guiding the hydraulic pressure in the center bypass to the hydraulic pump, as a negative control pressure. A negative control pressure control device controls the negative control pressure to an arbitrary value is also provided. The pump characteristic of the hydraulic pump is set such that the discharge flow rate is minimized when the negative control pressure in the negative control circuit is equal to or greater than a first predetermined pressure. Furthermore, an idling detection device that detects whether the hydraulic actuator is in a non-operated state or not is provided. The negative control pressure is forcefully controlled to the first predetermined pressure or higher when the non-operating state is detected.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: December 2, 2014
    Assignee: Caterpillar SARL
    Inventors: Hiroyasu Nishikawa, Seiichi Akiyama, Yusuke Shimizu, Atsunobu Doi, Sei Shimahara, Manabu Nakanishi, Masashi Shibata
  • Publication number: 20130310213
    Abstract: A planetary gear reducer (1) includes: a sun gear (5) having external teeth and fixed concentrically to a power input shaft (3); a plurality of planet gears (7) having external teeth and mashing with the sun gear (5); a ring gear (9) having internal teeth and meshing with the planet gears (7); a planet carrier (11) configured to support a plurality of planet shafts (13), each of which is a rotational axis of a corresponding one of the planet gears (7), and to output revolution of the plurality of planet gears (7) as first power; and a cylindrical support (27) connected to the ring gear (9) such that the cylindrical support (27) is non-rotatable relative to the ring gear (9), the cylindrical support (27) being configured to output rotation of the ring gear (9) as second power. The cylindrical support (27) includes, at its one part along the direction of a central axis, a flexible structure (41) which is curved radially inward and has a V-shaped longitudinal section.
    Type: Application
    Filed: November 15, 2011
    Publication date: November 21, 2013
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Tetsuya Matsuoka, Hiroyasu Nishikawa, Kazuhiro Sato, Hideyuki Imai, Tatsuhiko Goi
  • Patent number: 8539762
    Abstract: A hydraulic control circuit includes a hydraulic cylinder, a control valve, a recovery oil passage, a hydraulic pump, an engine rotation speed setting unit, a recovery control valve, and a controller that reduces an engine rotation speed to not more than a preset reduction control engine rotation speed when the load is lowered; and adjusts an increase or decrease in an opening amount of the recovery control valve in accordance with a level of the target rotation speed set by the engine rotation speed setting unit.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: September 24, 2013
    Assignee: Caterpillar Japan Ltd.
    Inventors: Yoshiyuki Shimada, Hiroyasu Nishikawa, Masaru Mishima, Yutaka Yokoyama
  • Publication number: 20130206121
    Abstract: An engine includes an EGR apparatus which refluxes a portion of exhaust gas from an exhaust manifold to an intake manifold as EGR gas. A differential pressure sensor detects a differential pressure between intake pressure of the intake manifold and exhaust pressure in the exhaust manifold. The differential pressure sensor is mounted on a head cover which covers an upper portion of a cylinder head. An intake pressure taking-out passage which is in communication with the intake manifold is formed in the cylinder head. An intake pressure introducing passage which is connected to the differential pressure sensor is formed in the head cover. The intake pressure taking-out passage and the intake pressure introducing passage are in communication with each other.
    Type: Application
    Filed: February 17, 2011
    Publication date: August 15, 2013
    Inventor: Hiroyasu Nishikawa
  • Patent number: 8398525
    Abstract: A planetary gear reduction system has a sun gear, a plurality of planet gears, a ring gear, and a planet carrier. The planet carrier has a first plate supporting one ends of planet shafts supporting the planet gears, a second plate supporting the other ends of the planet shafts, and a cylindrical drum connecting the first and second plates.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: March 19, 2013
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Tetsuya Matsuoka, Hiroyasu Nishikawa, Tooru Nishida, Hirofumi Akahori, Hideyuki Imai, Tatsuhiko Goi
  • Patent number: 8348803
    Abstract: A planetary reduction gear apparatus has a sun gear having external teeth; planetary gears, each having external teeth and configured to be meshed with the sun gear; planetary shafts, each being a rotation shaft of the planetary gear; a ring gear having internal teeth and configured to be meshed with the planetary gears; and a planetary carrier including an annular base plate and an annular back plate. The planetary carrier supports the planetary shafts between the annular base plate and the annular back plate and determines a relative position between planetary gears. The annular base plate is integrally formed with one end of the planetary shaft to support the one end. The annular back plate supports the other end of the planetary shaft. At least one of the planetary shaft and the planetary carrier has lower stiffness in its part adjacent to the one end of the planetary shaft than stiffness of its part adjacent to the other end thereof.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: January 8, 2013
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Tetsuya Matsuoka, Hiroyasu Nishikawa, Tooru Nishida, Hirofumi Akahori, Tatsuhiko Goi
  • Publication number: 20120260646
    Abstract: A controller controls the solenoid-operated variable pressure relief valves that are provided to control, at set pressures that can be electrically commanded, pressure of hydraulic oil fed to an attachment cylinder. The controller is provided with a control logic that is capable of controlling the aforementioned solenoid-operated variable pressure relief valves. The control logic performs the aforementioned calculation by compensating for pressure override characteristics of each solenoid-operated variable pressure relief valve based on input signals related to the set relief pressure for and a relief valve passing flow rate of the solenoid-operated variable pressure relief valve, and outputting to the solenoid-operated variable pressure relief valve command signals related to the adjusted set relief pressure resulting from the compensation of the pressure override characteristics.
    Type: Application
    Filed: December 27, 2011
    Publication date: October 18, 2012
    Applicant: Caterpillar Sarl
    Inventors: Hiroyasu Nishikawa, Sei Shimahara, Manabu Nakanishi, Masashi Shibata
  • Publication number: 20120036845
    Abstract: A hydraulic pump driven by an engine, a hydraulic actuator, and a negative control circuit are provided on an open center hydraulic circuit, for guiding the hydraulic pressure in the center bypass to the hydraulic pump, as a negative control pressure. A negative control pressure control device controls the negative control pressure to an arbitrary value is also provided. The pump characteristic of the hydraulic pump is set such that the discharge flow rate is minimized when the negative control pressure in the negative control circuit is equal to or greater than a first predetermined pressure. Furthermore, an idling detection device that detects whether the hydraulic actuator is in a non-operated state or not is provided. The negative control pressure is forcefully controlled to the first predetermined pressure or higher when the non-operating state is detected.
    Type: Application
    Filed: August 17, 2010
    Publication date: February 16, 2012
    Inventors: Hiroyasu Nishikawa, Seiichi Akiyama, Yusuke Shimizu, Atsunobu Doi, Sei Shimahara, Manabu Nakanishi, Masashi Shibata
  • Publication number: 20110315415
    Abstract: A work machine equipped with an automatic hammering function is capable of preventing breakage of the hammer caused by blank firing. Hydraulic oil fed to a hydraulic breaker at the distal end of a work machine is controlled by first and second spools. Operating an operation lever so as to contract single rod type boom cylinders to press the hydraulic breaker against an object to be crushed. Head-side pressure and rod-side pressure of the boom cylinders are respectively detected by pressure sensors. Any one of switches is used to switch the mode of automatic hammering operation between an automatic hammering inhibiting mode and an automatic hammering authorizing mode. In the automatic hammering authorizing mode, a controller controls the first and second spools of the hydraulic breaker so as to open them only when head-side pressure and rod-side pressure of the boom cylinders are in a given range of pressing force.
    Type: Application
    Filed: February 2, 2010
    Publication date: December 29, 2011
    Applicant: CATERPILLAR JAPAN LTD.
    Inventors: Hiroyasu Nishikawa, Sei Shimahara, Manabu Nakanishi, Masashi Shibata
  • Patent number: 7958907
    Abstract: A fluid pressure circuit that can, in either case where a first actuator that is fed from a first pump or a second actuator that is fed from a second pump is operated, by allowing feeding of the hydraulic fluid to a specific actuator from either the first or second pump, improve interlockability with the specific actuator. A control valve is incorporated with a plurality of first-group spools fed from a drive pump and a plurality of second-group spools fed from an idle pump. A solenoid selector valve unit switches a pilot line of a second-group tool controlling spool to a communicating state at the time of detection of a spool operation by a first pressure switch and switches a pilot line of a first-group tool controlling spool to a communicating state at the time of detection of a spool operation by a second pressure switch.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: June 14, 2011
    Assignee: Caterpillar S.A.R.L.
    Inventors: Hiroyasu Nishikawa, Sei Shimahara