Patents by Inventor Nobuaki Onagi

Nobuaki Onagi 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: 9831521
    Abstract: To provide a nonaqueous electrolytic storage element, which contains: a positive electrode, which contains a positive electrode material layer including a positive electrode active material capable of reversibly accumulating and releasing anions; a negative electrode, which contains a negative electrode material layer including a negative electrode active material capable of reversibly accumulating and releasing cations; a separator provided between the positive electrode and the negative electrode; and a nonaqueous electrolyte containing an electrolyte salt, wherein a pore volume of the negative electrode material layer per unit area of the negative electrode is larger than a pore volume of the positive electrode material layer per unit area of the positive electrode.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: November 28, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Okitoshi Kimura, Nobuaki Onagi, Eiko Hibino, Hisamitsu Kamezaki, Anna Hirowatari, Yasunori Sugimoto
  • Patent number: 9754726
    Abstract: To provide a nonaqueous electrolytic capacitor element, which contains: a positive electrode containing a positive electrode active material capable of intercalating or deintercalating anions; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte, which contains a nonaqueous solvent, an electrolyte salt containing a halogen atom, and a compound having a site capable of bonding to an anion containing a halogen atom.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: September 5, 2017
    Assignees: Ricoh Company, Ltd., Kyushu University
    Inventors: Nobuaki Onagi, Okitoshi Kimura, Eiko Hibino, Hisamitsu Kamezaki, Tatsumi Ishihara
  • Publication number: 20170047583
    Abstract: A non-aqueous electrolyte storage element, which contains a positive electrode; a negative electrode; and a non-aqueous electrolyte, wherein the positive electrode is an electrode, which contains: graphite-carbon composite particles composed of graphite particles and a carbon layer covering the graphite particles, and containing crystalline carbon; and activated carbon, and wherein the positive electrode is capable of accumulating and releasing anions.
    Type: Application
    Filed: May 1, 2015
    Publication date: February 16, 2017
    Inventors: Hisamitsu KAMEZAKI, Nobuaki ONAGI, Masaki YOSHIO
  • Publication number: 20170005361
    Abstract: A nonaqueous electrolyte secondary battery, which contains: an anode capable of accumulating or releasing metal lithium, or a lithium ion, or both; a cathode relative to the anode; and a nonaqueous electrolyte, in which a lithium salt is dissolved in a nonaqueous solvent, wherein, after repeating charge of the nonaqueous electrolyte secondary battery to an overcharge region and discharge for the charge 20 times, a charge capacity of the nonaqueous electrolyte secondary battery for 21st charge is a capacity equal to or greater than 100% SOC (State of Charge), where 100% SOC is an arbitrary capacity indicating that electric potential of the anode is reduced by 5% or greater based on a relative value, compared to electric potential thereof when SOC is 0%.
    Type: Application
    Filed: December 5, 2014
    Publication date: January 5, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Hisamitsu KAMEZAKI, Nobuaki ONAGI, Masaki YOSHIO
  • Publication number: 20160260972
    Abstract: To provide a non-aqueous electrolyte storage element including a positive electrode containing a positive electrode active material capable of inserting and eliminating anions, a negative electrode containing a negative electrode active material capable of inserting and eliminating cations, and a non-aqueous electrolyte prepared by dissolving an electrolyte salt in a non-aqueous solvent, wherein the positive electrode active material contains a carbon material, where a distance between (002) planes, d(002), of the carbon material as measured by X-ray diffraction is 0.340 nm or greater but 0.360 nm or less, and the carbon material has a BET specific surface area of greater than 1 m2/g but smaller than 30 m2/g, and the negative electrode active material contains a material capable of inserting and eliminating lithium ions.
    Type: Application
    Filed: February 22, 2016
    Publication date: September 8, 2016
    Inventors: Eiko HIBINO, Okitoshi KIMURA, Nobuaki ONAGI, Satoshi NAKAJIMA, Anna HIROWATARI, Takashi YAMAGATA, Tatsumi ISHIHARA, Yoshihisa TANAKA, Ryo OSHIMA, Toshihiro NAKABO
  • Publication number: 20160013488
    Abstract: Provided is a power storage element, including: a positive electrode; a negative electrode containing a carbonaceous material as a negative-electrode active material; and a non-aqueous electrolytic solution obtained by dissolving an electrolyte in a non-aqueous solvent, wherein a crystallite size Lc(002) of the carbonaceous material in a c-axis direction is from 1.65 nm to 241.1 nm, and wherein cations of electrolyte ions are intercalated into and deintercalated from the negative electrode, and anions thereof are intercalated into and deintercalated from the positive electrode.
    Type: Application
    Filed: July 9, 2015
    Publication date: January 14, 2016
    Inventors: Hisamitsu KAMEZAKI, Nobuaki ONAGI, Masaki YOSHIO
  • Publication number: 20150303513
    Abstract: To provide nonaqueous electrolytic storage element, containing: a positive electrode, which contains a positive electrode active material capable of accumulating and releasing anions; a negative electrode containing a negative electrode active material capable of accumulating and releasing cations; and a nonaqueous electrolyte containing an electrolyte salt, wherein a capacity of the negative electrode per unit area is larger than a capacity of the positive electrode per unit area, and wherein an amount of the electrolyte salt in the nonaqueous electrode at the time of completion of charging after 50 cycles of charging and discharging is 0.2 mol/L to 1 mol/L, where the cycle of charging and discharging contains charging the nonaqueous electrolytic storage element to 5.2 V with constant electric current of 0.5 mA/cm2, followed by discharging the nonaqueous electrolytic storage element to 2.5 V with constant electric current of 0.5 mA/cm2.
    Type: Application
    Filed: December 25, 2013
    Publication date: October 22, 2015
    Inventors: Anna HIROWATARI, Eiko HIBINO, Nobuaki ONAGI, Okitoshi KIMURA, Hisamitsu KAMEZAKI, Yasunori SUGIMOTO
  • Publication number: 20150303512
    Abstract: To provide a nonaqueous electrolytic storage element, which contains: a positive electrode, which contains a positive electrode material layer including a positive electrode active material capable of reversibly accumulating and releasing anions; a negative electrode, which contains a negative electrode material layer including a negative electrode active material capable of reversibly accumulating and releasing cations; a separator provided between the positive electrode and the negative electrode; and a nonaqueous electrolyte containing an electrolyte salt, wherein a pore volume of the negative electrode material layer per unit area of the negative electrode is larger than a pore volume of the positive electrode material layer per unit area of the positive electrode.
    Type: Application
    Filed: December 12, 2013
    Publication date: October 22, 2015
    Inventors: Okitoshi KIMURA, Nobuaki ONAGI, Eiko HIBINO, Hisamitsu KAMEZAKI, Anna HIROWATARI, Yasunori SUGIMOTO
  • Publication number: 20150287537
    Abstract: To provide a nonaqueous electrolytic capacitor element, which contains: a positive electrode containing a positive electrode active material capable of intercalating or deintercalating anions; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte, which contains a nonaqueous solvent, an electrolyte salt containing a halogen atom, and a compound having a site capable of bonding to an anion containing a halogen atom.
    Type: Application
    Filed: November 11, 2013
    Publication date: October 8, 2015
    Applicants: Ricoh Company, Ltd., Kyushu University
    Inventors: Nobuaki Onagi, Okitoshi Kimura, Eiko Hibino, Hisamitsu Kamezaki, Tatsumi Ishihara
  • Patent number: 9111684
    Abstract: To provide a non-aqueous electrolyte storage element, including: a positive electrode which includes a positive-electrode active material capable of intercalating or deintercalating anions; a negative electrode which includes a negative-electrode active material capable of storing or releasing metallic lithium or lithium ion, or both thereof; a first separator between the positive electrode and the negative electrode; and a non-aqueous electrolyte which includes a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, wherein the non-aqueous electrolyte storage element includes a solid lithium salt at 25° C. and a discharge voltage of 4.0 V, wherein the non-aqueous electrolyte storage element includes an ion-exchange membrane between the first separator and the positive electrode, between the first separator and the negative electrode, or between the first separator and the positive electrode and between the first separator and the negative electrode.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: August 18, 2015
    Assignees: Ricoh Company, Ltd., Kyushu University
    Inventors: Nobuaki Onagi, Eiko Hibino, Tatsumi Ishihara
  • Publication number: 20140186696
    Abstract: To provide a nonaqueous electrolyte secondary battery, containing: a positive electrode, which contains a positive electrode active material capable of inserting and detaching anions; a negative electrode, which contains a negative electrode active material capable of accumulating and releasing metal lithium, or lithium ions, or both thereof; and a nonaqueous electrolyte formed by dissolving a lithium salt in a nonaqueous solvent, wherein the nonaqueous electrolyte secondary battery contains a solid lithium salt at 25° C., and discharge voltage of 4.0 V.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 3, 2014
    Inventors: Nobuaki ONAGI, Eiko Hibino, Susumu Okada, Tatsumi Ishihara
  • Patent number: 8607259
    Abstract: A disk laminate includes thin disks laminated to each other, which are to be suctioned and conveyed; and spacers provided between the thin disks to prevent the thin disks from directly contacting each other, the spacers having air permeability.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: December 10, 2013
    Assignees: Ricoh Company, Ltd., Chotaro Engineering, Co.
    Inventors: Yoshimichi Takano, Nobuaki Onagi, Kohji Tsukahara, Haruki Tokumaru, Daiichi Koide, Takeshi Kajiyama, Masami Nishida
  • Publication number: 20130288113
    Abstract: To provide a non-aqueous electrolyte storage element, including: a positive electrode which includes a positive-electrode active material capable of intercalating or deintercalating anions; a negative electrode which includes a negative-electrode active material capable of storing or releasing metallic lithium or lithium ion, or both thereof, a first separator between the positive electrode and the negative electrode; and a non-aqueous electrolyte which includes a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, wherein the non-aqueous electrolyte storage element includes a solid lithium salt at 25° C. and a discharge voltage of 4.0V, wherein the non-aqueous electrolyte storage element includes an ion-exchange membrane between the first separator and the positive electrode, between the first separator and the negative electrode, or between the first separator and the positive electrode and between the first separator and the negative electrode.
    Type: Application
    Filed: April 25, 2013
    Publication date: October 31, 2013
    Inventors: Nobuaki Onagi, Eiko Hibino, Susumu Okada, Tatsumi Ishihara
  • Patent number: 8549547
    Abstract: A disclosed disk clamping mechanism includes a turntable fixed on a rotational shaft of a spindle motor to rotate a flexible thin optical disk, a stabilizer member configured to suppress a run-out of the flexible thin optical disk by an applying aerodynamic force to the rotating flexible thin optical disk so as to stabilize the run-out of the rotating flexible thin optical disk, and a clamper movably supported in a center of the stabilizer member in a direction perpendicular to a surface of the flexible thin optical disk. In the disclosed disk clamping mechanism, the flexible thin optical disk is sandwiched between the turntable and the clamper such that the turntable and the clamper rotate the flexible thin optical member sandwiched in-between.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: October 1, 2013
    Assignees: Ricoh Company, Ltd., Chotaro Engineering Co.
    Inventors: Nobuaki Onagi, Yasutomo Aman, Haruki Tokumaru, Yoshimichi Takano, Daiichi Koide, Takeshi Kajiyama, Masami Nishida
  • Patent number: 8495669
    Abstract: A disk rotating device includes a flexible disk in which information is recordable, a turntable on which the disk is held, a spindle that rotates the disk held on the turntable, and a stabilizer that stabilizes the rotating disk. In the disk rotating device, a rotation transmitting device transmits the rotation of the spindle to the disk via the turntable, and a disk holding device holds the disk so that the disk is elastically deformable from a center of the rotation of the disk in a radial direction of the disk.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: July 23, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasutomo Aman, Nobuaki Onagi, Shozo Murata, Yasunori Sugimoto, Haruki Tokumaru, Daiichi Koide, Yoshimichi Takano
  • Patent number: 8259543
    Abstract: A data recording/reproduction method for performing a data recording/reproduction process on a flexible optical disk by rotating the flexible optical disk while controlling an axial runout of the flexible optical disk with a stabilizing member that applies an aerodynamic force to the flexible optical disk, and irradiating an optical beam and focusing the optical beam to the flexible optical disk is disclosed that includes the steps of a) generating a first axial runout, b) generating a focus error signal forming an S-curve when the first axial runout is generated, c) determining a position of the optical beam according to the focus error signal, d) generating a second axial runout that is smaller than the first axial runout after step c), and e) conducting at least one of the data recording process and the data reproduction process after step d).
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: September 4, 2012
    Assignees: Ricoh Company, Ltd., Nippon Hoso Kyokai
    Inventors: Daiichi Koide, Nobuaki Onagi, Yasutomo Aman, Yoshimichi Takano, Haruki Tokumaru
  • Patent number: 8228772
    Abstract: A recording/reproducing apparatus is disclosed that includes a spindle motor unit including a spindle on which a flexible recording disk is placed, a stabilizer plate disposed so as to face the recording disk, a torque detection unit configured to detect a drive torque applied to the spindle motor unit, an adjustment unit configured to adjust a gap between the recording disk and the stabilizer plate, and a determination unit configured to determine an optimal gap to be set to the gap based on the drive torque detected by the torque detection unit, in which the adjustment unit sets the optimum gap determined by the determination unit to the gap.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: July 24, 2012
    Assignees: Ricoh Company, Ltd., Nippon Hoso' Kyokai
    Inventors: Nobuaki Onagi, Yasutomo Aman, Minoru Takahashi, Haruki Tokumaru, Yoshimichi Takano, Daiichi Koide
  • Patent number: 8174946
    Abstract: An optical disk apparatus includes a rotary driving unit rotating an optical disk which is flexible, an optical pickup irradiating light upon a recording surface of the optical disk on which writing/reading of information is performed, a stabilizing unit stabilizing vibration of the optical disk in a rotary axial direction by using pressure difference of air flow at least on a portion where writing/reading is performed, and being disposed on a side of the optical disk opposite to a side on which the recording surface is provided, and a control-adjustment unit analyzing a value of a tracking error signal of the optical disk obtained by scanning along a groove of the optical disk with use of the optical pickup, comparing the analyzed value of the tracking error signal of the optical disk and a value priorly obtained by scanning along a groove of a standard disk prepared beforehand, and adjusting a positional relation between the optical disk and the stabilizing member in a three dimensional space according to t
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: May 8, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasutomo Aman, Nobuaki Onagi, Shozo Murata
  • Publication number: 20120060174
    Abstract: A recording/reproducing apparatus is disclosed that includes a spindle motor unit including a spindle on which a flexible recording disk is placed, a stabilizer plate disposed so as to face the recording disk, a torque detection unit configured to detect a drive torque applied to the spindle motor unit, an adjustment unit configured to adjust a gap between the recording disk and the stabilizer plate, and a determination unit configured to determine an optimal gap to be set to the gap based on the drive torque detected by the torque detection unit, in which the adjustment unit sets the optimum gap determined by the determination unit to the gap.
    Type: Application
    Filed: November 9, 2011
    Publication date: March 8, 2012
    Inventors: Nobuaki Onagi, Yasutomo Aman, Minoru Takahashi, Haruki Tokumaru, Yoshimichi Takano, Daiichi Koide
  • Patent number: RE43056
    Abstract: An optical disk includes: a substrate shaped in a disk, and having a recording surface; a plurality of recording tracks formed substantially coaxially on the recording surface; a plurality of information pits, which are reproducible by a super resolution reproduction, recorded on the plurality of recording tracks in a recording operation of the optical disk; and an address pit for address reproduction formed in advance to the recording operation on the recording surface with respect to one set of recording tracks adjacent to each other in a radial direction of the optical disk.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: January 3, 2012
    Assignee: Pioneer Electronic Corporation
    Inventor: Nobuaki Onagi