Patents by Inventor Katsumi Tamura

Katsumi Tamura 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: 10897062
    Abstract: In order to provide a lithium ion secondary battery having both high energy density and an excellent charging-rate characteristic, in the lithium ion secondary battery comprising a positive electrode, a negative electrode and an electrolyte solution, the electrolyte solution comprises 0.5 mol/l or more of Li[(FSO2)2N], 0.5 mol/l or more of LiPF6, and LiPO2F2; and the negative electrode comprises graphite deposited with amorphous carbon or graphite coated with amorphous carbon and having a specific surface area of 4 m2/g or less, as a negative electrode active material.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: January 19, 2021
    Assignee: NEC Corporation
    Inventors: Noriyuki Tamura, Katsumi Maeda, Qian Cheng
  • Publication number: 20200352648
    Abstract: An abnormality detection system for highly precise detection of an abnormality in a laser treatment device includes a laser transmission tube coupled with a laser treatment unit, oscillating laser light, a discharge-side water pressure sensor, and a water pressure detection liquid surface level meter detecting a change in a pressure of cooling water flowing through forward-direction and a backward-direction spaces in the laser transmission tube. The laser transmission tube includes a hollow wavelength path having a lightguide space formed in a longitudinal direction, and an outer case enclosing an outer circumferential surface of the hollow waveguide path and extending in the longitudinal direction. The discharge-side water pressure sensor and the water pressure detection liquid surface level meter detect the change in the pressure of the cooling water flowing through in a forward-direction space and a backward-direction space to detect any abnormality.
    Type: Application
    Filed: July 30, 2020
    Publication date: November 12, 2020
    Applicant: J. MORITA MFG. CORP.
    Inventors: Yoshiteru TAMURA, Yoshihide OKAGAMI, Akihito HONGO, Katsumi HIYOSHI, Haruhiko MURAKAMI
  • Patent number: 10792102
    Abstract: A laser tip, a laser treatment tool, a laser treatment device and a laser treatment system are provided for performing laser treatment surgery and minimizing any bleeding. A laser tip is attachable to a laser radiation opening located at the tip end of a laser transmission tube. The laser tip includes an attaching portion detachable from the laser radiation opening and a contact portion contactable with biological tissue. The contact portion is at the front of the attaching portion in the direction in which the laser light exits the laser radiation opening. An open space is located between the contact portion and the attaching portion, and a coupler couples a part of the contact portion and a part of the attaching portion. The contact portion has a reflective surface at a rear end thereof which reflects the laser light toward the coupler.
    Type: Grant
    Filed: March 18, 2018
    Date of Patent: October 6, 2020
    Assignees: J. Morita Mfg. Corp., National University Corporation Kobe University
    Inventors: Yoshihide Okagami, Akihito Hongo, Yoshiteru Tamura, Katsumi Hiyoshi, Haruhiko Murakami, Takeshi Azuma, Yoshinori Morita
  • Patent number: 10753357
    Abstract: A fuel pump includes an intake valve unit which is provided between a low-pressure chamber and a pressurizing chamber. The intake valve unit includes an intake valve configured to move in an axial direction of the intake valve unit and a valve stopper arranged between the intake valve and the pressurizing chamber. A plurality of fuel passages configured to allow fuel to communicate between the low-pressure chamber and the pressurizing chamber are formed on a radially outward of an outer peripheral surface of the valve stopper.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: August 25, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Satoshi Usui, Kenichiro Tokuo, Tatsuo Kawano, Masahiko Hayatani, Shingo Tamura, Hiroyuki Yamada, Katsumi Miyazaki
  • Publication number: 20200203767
    Abstract: The invention provides a lithium ion battery, including an anode, a cathode and an electrolytic solution including imide anion based lithium salt and LiPO2F2. The cathode includes a cathode active material particle and a carbon conductive additive forming an island-bridge structure on the surface of the cathode active material particle. The carbon conductive additive includes graphenes partially covered with the surface of the cathode active material particle to form an island structure, carbon blacks attached on the surface of the graphene and carbon nanotubes connecting between graphenes as a bridge structure.
    Type: Application
    Filed: July 20, 2017
    Publication date: June 25, 2020
    Applicant: NEC CORPORATION
    Inventors: Qian CHENG, Katsumi MAEDA, Noriyki TAMURA, Mika SHIBA
  • Patent number: 10655585
    Abstract: A high-pressure fuel supply pump includes a pressurizing chamber, a piston plunger, and an electromagnetically-driven intake valve mechanism. The piston plunger reciprocates within the pressurizing chamber. The electromagnetically-driven intake valve mechanism is provided at an inlet of the pressurizing chamber. The electromagnetically-driven intake valve mechanism includes an anchor which pulls a plunger rod, a fixed core which attracts the anchor, and a yoke in which inner peripheral part has the fixed core and the anchor. The fixed core is fixed to a bottom part of the yoke. A through hole is formed at a bottom part of the fixed core.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: May 19, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Satoshi Usui, Kenichiro Tokuo, Tatsuo Kawano, Masahiko Hayatani, Shingo Tamura, Hiroyuki Yamada, Katsumi Miyazaki
  • Patent number: 10622678
    Abstract: In terms of a lithium ion secondary battery using, in a positive electrode, a lithium transition metal composite oxide containing an over-stoichiometric amount of lithium, a lithium ion secondary battery in which an amount of a gas generated during charge/discharge cycles is reduced and capacity retention is improved is provided. The lithium ion secondary battery includes a positive electrode containing a lithium transition metal composite oxide containing Fe and containing an over-stoichiometric amount of lithium, and a nonaqueous electrolyte solution, and the nonaqueous electrolyte solution contains a nonaqueous organic solvent, an electrolyte, and lithium difluorophosphate.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: April 14, 2020
    Assignee: NEC CORPORATION
    Inventors: Katsumi Maeda, Noriyuki Tamura, Sadanori Hattori
  • Patent number: 10513182
    Abstract: A vehicle display apparatus includes an image display panel, a backlight, and a translucent plate. The image display panel displays an image in a display area. The backlight emits a light in a direction from a back surface of the image display panel toward the display area. The translucent plate has a plate shape and is disposed between the image display panel and the backlight. The translucent plate transmits the light emitted from the backlight. The translucent plate has a three-dimensional indicator configured to be visually recognized through the image display panel, and a periphery portion of the translucent plate is disposed out of the display area.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: December 24, 2019
    Assignee: DENSO CORPORATION
    Inventors: Masashi Toyota, Satoru Tamura, Katsumi Fujita, Seigo Tane
  • Publication number: 20190312306
    Abstract: In order to provide a lithium ion secondary battery having both high energy density and an excellent charging-rate characteristic, in the lithium ion secondary battery comprising a positive electrode, a negative electrode and an electrolyte solution, the electrolyte solution comprises 0.5 mol/l or more of Li[(FSO2)2N], 0.5 mol/l or more of LiPF6, and LiPO2F2; and the negative electrode comprises graphite deposited with amorphous carbon or graphite coated with amorphous carbon and having a specific surface area of 4 m2/g or less, as a negative electrode active material.
    Type: Application
    Filed: June 13, 2017
    Publication date: October 10, 2019
    Applicant: NEC Corporation
    Inventors: Noriyuki TAMURA, Katsumi MAEDA, Qian CHENG
  • Publication number: 20190305317
    Abstract: The object of the invention is to provide a new lithium ion battery system that can have both high energy density and fast chargeable capability. The invention provides a lithium ion battery, comprising an anode comprising an anode active material layer on an anode current collector, the anode active material layer having a mass load higher than 60 g/m2, a cathode comprising a cathode active material layer on a cathode current collector, the cathode active material layer having a mass load higher than 100 g/m2, and an electrolytic solution comprising an imide anion based lithium salt and LiPO2F2, wherein at least one of the anode and cathode active material layers comprises a spacer composed of a hard carbon.
    Type: Application
    Filed: October 6, 2016
    Publication date: October 3, 2019
    Applicant: NEC CORPORATION
    Inventors: Qian CHENG, Katsumi MAEDA, Noriyuki TAMURA
  • Publication number: 20190280300
    Abstract: An electrode for lithium ion secondary batteries, including a porous glass particle and a positive electrode active material or negative electrode active material that is capable of occluding and releasing lithium ions wherein the pore volume of the porous glass particle is from 0.1 ml/g to 2 ml/g, is used to provide a lithium ion secondary battery excellent in a charge rate property.
    Type: Application
    Filed: October 25, 2017
    Publication date: September 12, 2019
    Applicant: NEC CORPORATION
    Inventors: Katsumi MAEDA, Noriyuki TAMURA, Mika SHIBA
  • Patent number: 9435392
    Abstract: A parking brake control device for a transport vehicle is attached to a vehicle body including a parking brake (17) of a negative control type for maintaining a state in which rotation of wheels is stopped, the parking brake control device including a control unit (32) for controlling movement of a spool (21) for magnetizing or demagnetizing a solenoid valve (25) to release or actuate the parking brake (17). The control unit (32) includes a stop determining section (33) that determines whether the vehicle body stops traveling, an actuation command section (34) that actuates the parking brake (17) when the stop determining section (33) determines that the vehicle body is stopped, and a release command section (35) that releases the parking brake (17) after elapse of a preset setting time after the actuation of the parking brake (17) is started by the actuation command section (34).
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: September 6, 2016
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Toshikazu Minoshima, Katsumi Tamura, Takao Kurosawa, Yudai Itai
  • Publication number: 20140374199
    Abstract: A parking brake control device for a transport vehicle is attached to a vehicle body including a parking brake (17) of a negative control type for maintaining a state in which rotation of wheels is stopped, the parking brake control device including a control unit (32) for controlling movement of a spool (21) for magnetizing or demagnetizing a solenoid valve (25) to release or actuate the parking brake (17). The control unit (32) includes a stop determining section (33) that determines whether the vehicle body stops traveling, an actuation command section (34) that actuates the parking brake (17) when the stop determining section (33) determines that the vehicle body is stopped, and a release command section (35) that releases the parking brake (17) after elapse of a preset setting time after the actuation of the parking brake (17) is started by the actuation command section (34).
    Type: Application
    Filed: November 30, 2012
    Publication date: December 25, 2014
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Toshikazu Minoshima, Katsumi Tamura, Takao Kurosawa, Yudai Itai
  • Patent number: 8840189
    Abstract: In case a burden is discharged from a vessel (3), the vessel (3) is raised obliquely backward with respect to a vehicle body (2) by a hoist cylinder (10). However, when discharging work is stopped on the way, the vessel (3) is temporarily lowered to a position at which this sits on the vehicle body (2). When the vessel (3) lowers, a weight of the burden left loaded thereon acts on the hoist cylinder (10) as a load in addition to the weight of the vessel (3). A controller (35) determines whether the vessel (3) lowers in a burden loading state based on various detection signals. When the vessel (3) lowers in the burden loading state, switching of directional control valves (20) and (21) is controlled so as to decrease a contracting speed of the hoist cylinder (10), thereby prevent the vessel (3) from colliding against the vehicle body (2).
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: September 23, 2014
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Toshikazu Minoshima, Michio Fushiki, Katsumi Tamura, Takao Kurosawa
  • Patent number: 8731787
    Abstract: A control valve device comprises two direction control valves. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. When a hoist cylinder is telescopically operated to raise or lower a vessel, as the hoist cylinder approaches a stop position, a controller determines that the hoist cylinder gets close to the stop position. Based upon this determination, the controller variably adjusts a flow passage area of the direction control valve using the variable throttle portions or variably adjusts a flow passage area of the direction control valve using the variable throttle portions in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder corresponding to the weight in the side of vessel.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: May 20, 2014
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Katsumi Tamura, Toshikazu Minoshima, Michio Fushiki, Takao Kurosawa
  • Patent number: 8668044
    Abstract: There is provided a circulation line (39) for circulating pressurized oil from an accumulator (11) into a housing (15) of a steering valve (14). An orifice joint (41) is provided along the path of the circulation line (39). The orifice joint (41) is removably mounted on the housing (15) of the steering valve (14) from outside. An orifice portion (42) of the orifice joint (41) applies a throttling function to the circulating oil liquid whereby a frictional heat is generated therein. The oil liquid in a warm state flows through a communication passage (21), passages in a spool valve (16), and a low pressure side passage (18B), thus enabling the steering valve (14) to be always in a warm state.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: March 11, 2014
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Katsumi Tamura, Kazumasa Horii, Knud Jensen Meldgaard
  • Publication number: 20130035828
    Abstract: A control valve device comprises two direction control valves. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. When a hoist cylinder is telescopically operated to raise or lower a vessel, as the hoist cylinder (10) approaches a stop position, a controller determines that the hoist cylinder gets close to the stop position. Based upon this determination, the controller variably adjusts a flow passage area of the direction control valve using the variable throttle portions or variably adjusts a flow passage area of the direction control valve using the variable throttle portions in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder corresponding to the weight in the side of vessel.
    Type: Application
    Filed: March 29, 2011
    Publication date: February 7, 2013
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Katsumi Tamura, Toshikazu Minoshima, Michio Fushiki, Takao Kurosawa
  • Publication number: 20120274121
    Abstract: In case a burden is discharged from a vessel (3), the vessel (3) is raised obliquely backward with respect to a vehicle body (2) by a hoist cylinder (10). However, when discharging work is stopped on the way, the vessel (3) is temporarily lowered to a position at which this sits on the vehicle body (2). When the vessel (3) lowers, a weight of the burden left loaded thereon acts on the hoist cylinder (10) as a load in addition to the weight of the vessel (3). A controller (35) determines whether the vessel (3) lowers in a burden loading state based on various detection signals. When the vessel (3) lowers in the burden loading state, switching of directional control valves (20) and (21) is controlled so as to decrease a contracting speed of the hoist cylinder (10), thereby prevent the vessel (3) from colliding against the vehicle body (2).
    Type: Application
    Filed: December 9, 2010
    Publication date: November 1, 2012
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Toshikazu Minoshima, Michio Fushiki, Katsumi Tamura, Takao Kurosawa
  • Publication number: 20110308882
    Abstract: There is provided a circulation line (39) for circulating pressurized oil from an accumulator (11) into a housing (15) of a steering valve (14). An orifice joint (41) is provided along the path of the circulation line (39). The orifice joint (41) is removably mounted on the housing (15) of the steering valve (14) from outside. An orifice portion (42) of the orifice joint (41) applies a throttling function to the circulating oil liquid whereby a frictional heat is generated therein. The oil liquid in a warm state flows through a communication passage (21), passages in a spool valve (16), and a low pressure side passage (18B), thus enabling the steering valve (14) to be always in a warm state.
    Type: Application
    Filed: July 1, 2010
    Publication date: December 22, 2011
    Applicants: SAUER-DANFOSS-DAIKIN LTD., HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Katsumi Tamura, Kazumasa Horii, Knud Jensen Meldgaard
  • Patent number: 8042876
    Abstract: A branch line branching from midway of a hydraulic conduit or each of actuator side oil passages to connect a bottom side oil chamber of a hoist cylinder to a tank is provided to the hydraulic conduit or each of the actuator side oil passages. A manual operation valve for variably adjusting the flow rate in accordance with the operation of a lever handle is provided in the branch line. Maintenance work is performed with an engine stopped in this state. Subsequently, when a vessel is lowered onto a vehicle body, hydraulic oil can be discharged through the branch line from the bottom side oil chamber of the hoist cylinder to the tank by opening the manual operation valve, so that the hoist cylinder can be automatically contracted.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: October 25, 2011
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Katsumi Tamura, Satoru Kaneko