Patents by Inventor Yoshifumi Ohba

Yoshifumi Ohba 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: 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: 6026063
    Abstract: A library apparatus having a rotatable cell drum adapted to store a plurality of recording media cartridges, the cell drum having a plurality of columns and each column having plural cells configured to receive the recording media cartridges. The library apparatus further includes a door configured to selectively provide direct operator access to all of the cells of a selected column without the assistance of a media transport device. The library apparatus is provided with a cell drum locking mechanism configured to selectively lock the cell drum and prevent rotational movement of the cell drum, and a door locking mechanism configured to selectively lock the door and prevent opening of the door. A link operably interconnects the drum locking mechanism and the door locking mechanism such that the cell drum locking mechanism must assume a locked state before the door locking mechanism may assume an unlocked state.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: February 15, 2000
    Assignee: Fujitsu Limited
    Inventors: Yoshifumi Ohba, Manabu Kobayashi, Kenji Nakajima, Masayoshi Tanaka, Tsuyoshi Miura, Kazuyuki Mikawa, Masaaki Hashizume, Koji Yasuda
  • Patent number: 5936918
    Abstract: A direct entry/exit (DEE) door exposes several cells in the cell drum when the door is open. The DEE door is provided so that several storage media can be placed in or removed from the cell drum at once, either manually or automatically. The library apparatus automatically rearranges the storage media to fill the cells nearest the drive, which reduces the time required to locate storage media in the cell drum and place them in the drive. A locking mechanism locks the DEE door when the cell drum rotates, and locks the cell drum when the DEE door is open. Each cell in the cell drum has a skew mounting preventing mechanism and inverse mounting preventing mechanism which prevent incorrect mounting of a cartridge in the cell drum.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: August 10, 1999
    Assignees: Fujitsu Limited, Fujitsu Peripherals Limited
    Inventors: Yoshifumi Ohba, Manabu Kobayashi, Kenji Nakajima, Masayoshi Tanaka, Tsuyoshi Miura, Kazuyuki Mikawa
  • Patent number: 5757738
    Abstract: A library apparatus for storage media such as optical disks includes a rotatable cell drum having several columns of cells for storing the storage media, a load/unload device for inserting and removing cartridges one at a time, at least one drive for reading from or writing to selected media, and an accessor which moves the storage media between the load/unload device and the cell drum, and between the cell drum and the drive. The load/unload device rotates in a collinear arrangement with the cell drum, and can rotate in unison with the cell drum, or independently of the cell drum. The collinear arrangement of the cell drum and the load/unload device reduces the overall size of the library.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: May 26, 1998
    Assignees: Fujitsu Limited, Fujitsu Peripherals Limited
    Inventors: Yoshifumi Ohba, Manabu Kobayashi, Kenji Nakajima, Masayoshi Tanaka, Tsuyoshi Miura, Kazuyuki Mikawa, Masaaki Hashizume, Koji Yasuda