Patents by Inventor Yasutomo Aman

Yasutomo Aman 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).

  • Publication number: 20200114574
    Abstract: A resin powder contains a resin contains columnar particles, wherein the proportion of the columnar particles having a ratio (L/W) of less than 1 is 50 percent by volume or more in the total volume of the resin powder, where W represents the width in the radial direction of the columnar particles and L represents the length in the axis direction of the columnar particles.
    Type: Application
    Filed: September 6, 2019
    Publication date: April 16, 2020
    Inventors: Kiichi KAMODA, Akira SAITO, Yasutomo AMAN, Hitoshi IWATSUKI
  • Publication number: 20200016827
    Abstract: Provided is a resin powder for producing a three-dimensional object, wherein the resin powder has a number-average equivalent circle diameter of 10 micrometers or greater but 150 micrometers or less, and wherein a median in an equivalent circle diameter-based particle size distribution of the resin powder is higher than the average equivalent circle diameter.
    Type: Application
    Filed: March 7, 2018
    Publication date: January 16, 2020
    Inventors: Yasuyuki YAMASHITA, Akira SAITO, Sohichiroh IIDA, Hitoshi IWATSUKI, Yasuo SUZUKI, Nozomu TAMOTO, Kiichi KAMODA, Shigenori YAGUCHI, Shinzo HIGUCHI, Toshiyuki ISEKI, Yasutomo AMAN, Toshiyuki MUTOH, Mitsuru NARUSE
  • Publication number: 20190241734
    Abstract: A powder for solid freeform fabrication includes a first resin particle and a second resin particle, wherein MFR2 is greater than MFR1 and a ratio of MFR2 to MFR1 is from 2 to 5, where MFR1 represents a melt mass-flow rate (MFR) of the first resin particle and MFR2 represents a melt mass-flow rate of the second resin particle.
    Type: Application
    Filed: February 6, 2019
    Publication date: August 8, 2019
    Inventors: Mitsuru Naruse, Akira Saito, Hitoshi Iwatsuki, Yasuyuki Yamashita, Toshiyuki Mutoh, Yasutomo Aman, Kiichi Kamoda, Sohichiroh Iida, Shinzo Higuchi, Toshiyuki Iseki
  • Publication number: 20190134853
    Abstract: A particle for solid freeform fabrication having a columnar form has end surfaces and a side surface, wherein one of the end surfaces partially covers the side surface.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 9, 2019
    Inventors: Hitoshi IWATSUKI, Yasuyuki YAMASHITA, Kiichi KAMODA, Toshiyuki MUTOH, Yasutomo AMAN, Toshiyuki ISEKI, Mitsuru NARUSE, Akira SAITO, Shinzo HIGUCHI, Sohichiroh IIDA
  • Publication number: 20160327315
    Abstract: A heat exchanger includes a plurality of plate fins including a plurality of flow channels in which a heat medium flows; a plurality of corrugated fins, the plurality of plate fins and the plurality of corrugated fins being arranged alternately; and a reaction portion solidified by crystallization of reaction material slurry filling gaps between the plurality of plate fins and the plurality of the corrugated fins, the reaction material slurry including a reaction material that reversibly reacts with a reaction medium in an exothermic manner and in an endothermic manner to exchange heat with the heat medium.
    Type: Application
    Filed: April 28, 2016
    Publication date: November 10, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Masahiro MASUZAWA, Yasutomo AMAN, Yohei SHIREN, Hiroko OHKURA, Tomiko TAKAHASHI, Yoshifumi OHBA, Kohji TSUKAHARA
  • Publication number: 20160290685
    Abstract: A heat storage and release unit includes a reactant formed body for reacting with a reaction medium to store and release heat; a reaction vessel for accommodating the reactant formed body and exchanging heat with the reactant formed body; a reaction medium flow path structure, connected to the reaction vessel, for supplying the reaction medium to the reaction vessel or discharging the reaction medium from the reaction vessel. The reactant formed body includes a plate-like heat transfer plate that contacts the reaction vessel, heat transfer elements extending from a surface of the heat transfer plate at substantially right angles, and a reactant formed unit that encloses the heat transfer elements in such a way that the heat transfer elements are partially exposed from the reactant formed unit, and the reaction vessel can change form by a pressure difference between the outside and the inside of the reaction vessel.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 6, 2016
    Inventors: Yasutomo AMAN, Yohei SHIREN, Masahiro MASUZAWA, Hiroko OHKURA, Tomiko TAKAHASHI, Yoshifumi OHBA, Kohji TSUKAHARA, Kenichi HAYAKAWA
  • Patent number: 9453659
    Abstract: A reaction material formed body into which a reaction material reacting with a reaction medium to store or release heat is formed includes first and second opposite surfaces and multiple heat transfer enhancing members extending at least from the first surface to the second surface. At least two or more of the heat transfer enhancing members are oriented in a predetermined single direction.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: September 27, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasutomo Aman, Yohei Shiren, Masahiro Masuzawa, Hiroko Ohkura, Yoshifumi Ohba
  • Patent number: 9243179
    Abstract: A reaction material for a chemical heat pump includes type III anhydrous gypsum, a magnesium compound, and CaxMg1-xSO4. The reaction material for the chemical heat pump structurally changes between a compound including type III anhydrous gypsum, the magnesium compound, and CaxMg1-xSO4, and a compound including hemihydrate gypsum, a hydrate of the magnesium compound, and a hydrate of CaxMg1-xSO4 when subjected to heat storage process and heat release process. x is 0<x<1.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: January 26, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yohei Shiren, Masahiro Masuzawa, Hiroko Ohkura, Yasutomo Aman, Yoshifumi Ohba
  • Publication number: 20140305142
    Abstract: A reaction material formed body into which a reaction material reacting with a reaction medium to store or release heat is formed includes first and second opposite surfaces and multiple heat transfer enhancing members extending at least from the first surface to the second surface. At least two or more of the heat transfer enhancing members are oriented in a predetermined single direction.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 16, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yasutomo AMAN, Yohei SHIREN, Masahiro MASUZAWA, Hiroko OHKURA, Yoshifumi OHBA
  • Publication number: 20140231698
    Abstract: A reaction material for a chemical heat pump includes type III anhydrous gypsum, a magnesium compound, and CaxMg1-xSO4. The reaction material for the chemical heat pump structurally changes between a compound including type III anhydrous gypsum, the magnesium compound, and CaxMg1-xSO4, and a compound including hemihydrate gypsum, a hydrate of the magnesium compound, and a hydrate of CaxMg1-xSO4 when subjected to heat storage process and heat release process. x is 0<x<1.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 21, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yohei Shiren, Masahiro Masuzawa, Hiroko Ohkura, Yasutomo Aman, Yoshifumi Ohba
  • 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: 8077576
    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: March 6, 2009
    Date of Patent: December 13, 2011
    Assignees: Ricoh Company, Ltd., Nippon Hoso Kyokai
    Inventors: Nobuaki Onagi, Yasutomo Aman, Minoru Takahashi, Haruki Tokumaru, Yoshimichi Takano, Daiichi Koide
  • Publication number: 20110072446
    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: Application
    Filed: September 15, 2010
    Publication date: March 24, 2011
    Inventors: Nobuaki Onagi, Yasutomo Aman, Haruki Tokumaru, Yoshimichi Takano, Daiichi Koide, Takeshi Kajiyama, Masami Nishida
  • Patent number: 7852723
    Abstract: A stabilization part stabilizes surface vibration of a flexible optical disk along a rotation axis direction of the optical disk by means of pressure difference of air flow created according to Bernoulli's law at a portion on which information writing/reading is performed, provided on a side of the optical disk opposite to a side on which information recording/reproducing is performed. In this case, areas are provide on the upstream side and down stream side along the disk rotation direction of the portion of the optical disk which is stabilized by said stabilization part, said areas of the optical disk not having pressure difference created thereon by the air flow.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: December 14, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuaki Onagi, Yasutomo Aman, Shozo Murata
  • Patent number: 7823172
    Abstract: A disk apparatus includes a head configured to move along a recording surface of a rotating disk; and a stabilizing member provided so as to face the disk. A facing surface of the stabilizing member facing the disk includes a curved surface whose symmetrical axis is a center generating line passing through a center of the facing surface. The head reciprocally moves along a path which is offset from the center generating line.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: October 26, 2010
    Assignees: Ricoh Company, Ltd., Chotaro Engineering, Co.
    Inventors: Yasutomo Aman, Masami Nishida