Patents by Inventor Masao Kohzaki

Masao Kohzaki 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: 7189475
    Abstract: The present invention provides a secondary battery which is less expensive, whose safety is extremely high, which is of large capacity as well as good cyclic characteristic, and which uses an aqueous solution for the electrolytic solution. A lithium secondary battery according to the present invention is constituted by including a positive electrode, formed by binding a positive-electrode raw-material mixture including a positive electrode active material, a negative electrode, formed by binding a negative-electrode raw-material mixture including a negative electrode active material, and an electrolytic solution, comprising an aqueous solution in which a lithium salt is dissolved, said positive electrode active material including at least one of a layered structure lithium-manganese composite oxide whose basic composition is LiMnO2 and an olivine structure lithium-iron composite phosphorus oxide whose basic composition is LiFePO4.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: March 13, 2007
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Tsuyoshi Sasaki, Yoshio Ukyo, Hideyuki Nakano, Masao Kohzaki
  • Patent number: 7025907
    Abstract: A carbon-containing lithium-iron composite phosphorus oxide for a lithium secondary battery positive electrode active material, includes particles being composed of a lithium-iron composite phosphorus oxide having an olivine structure whose basic composition is LiFePO4, and being composited with carbonaceous fine particles. A process for producing the same includes the steps of mixing a lithium compound making a lithium source, an iron compound making an iron source, a phosphorus-containing ammonium salt making a phosphorus source and carbonaceous fine particles, thereby preparing a mixture, and calcicing the mixture at a temperature of from 600° C. or more to 750° C. or less.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: April 11, 2006
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Masao Kohzaki, Youji Takeuchi, Yoshio Ukyo
  • Publication number: 20030124423
    Abstract: The present invention provides a secondary battery which is less expensive, whose safety is extremely high, which is of large capacity as well as good cyclic characteristic, and which uses an aqueous solution for the electrolytic solution. A lithium secondary battery according to the present invention is constituted by including a positive electrode, formed by binding a positive-electrode raw-material mixture including a positive electrode active material, a negative electrode, formed by binding a negative-electrode raw-material mixture including a negative electrode active material, and an electrolytic solution, comprising an aqueous solution in which a lithium salt is dissolved, said positive electrode active material including at least one of a layered structure lithium-manganese composite oxide whose basic composition is LiMnO2 and an olivine structure lithium-iron composite phosphorus oxide whose basic composition is LiFePO4.
    Type: Application
    Filed: January 24, 2003
    Publication date: July 3, 2003
    Inventors: Tsuyoshi Sasaki, Yoshio Ukyo, Hideyuki Nakano, Masao Kohzaki
  • Publication number: 20020182497
    Abstract: A carbon-containing lithium-iron composite phosphorus oxide for a lithium secondary battery positive electrode active material, includes particles being composed of a lithium-iron composite phosphorus oxide having an olivine structure whose basic composition is LiFePO4, and being composited with carbonaceous fine particles. A process for producing the same includes the steps of mixing a lithium compound making a lithium source, an iron compound making an iron source, a phosphorus-containing ammonium salt making a phosphorus source and carbonaceous fine particles, thereby preparing a mixture, and calcicing the mixture at a temperature of from 600° C. or more to 750° C. or less.
    Type: Application
    Filed: May 14, 2002
    Publication date: December 5, 2002
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Masao Kohzaki, Youji Takeuchi, Yoshio Ukyo
  • Patent number: 5108813
    Abstract: A sliding member which ensures a low coefficient of friction and a high degree of wear resistance, and is suitable for use in a bearing, mechanical seal, etc. It comprises a ceramic or metallic base, a diamond film formed on a surface of the base and having a rugged surface defining concavities, and a soft metal filling those concavities. When a relative sliding motion is made between it and a mating part formed from a hard material, only a low coefficient of friction occurs and the abrasive wear of the mating part is greatly reduced. It can maintain its high wear resistance for a long time even when it is used in a dry mode not involving the use of any lubricating oil, coolant, etc., since the diamond film does not undergo any change under heat to graphite having a lower degree of hardness.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: April 28, 1992
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Shoji Noda, Kazuo Higuchi, Masao Kohzaki
  • Patent number: 5093647
    Abstract: A sliding electric part includes a set of two sliding members, wherein one of the sliding members is composed of a diamond substrate with an electric conductive portion formed by ion implanation or by the deposition of boron-doped p-type diamond on the sliding surface which slides along the other sliding member, and the other sliding member has an electric conductive portion formed on the sliding surface which slides along the one sliding member.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: March 3, 1992
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Shoji Noda, Kazuo Higuchi, Masao Kohzaki
  • Patent number: 4894411
    Abstract: Provided herein is a composite material which comprises a polyamide-containing resin, a layered silicate dispersed therein, and a substance such as polyamine which controls the crystalline structure or molecular structure of the resin. The composite material has improved mechanical strength and toughness and high clarity or transparency.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: January 16, 1990
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Akane Okada, Masaya Kawasumi, Masao Kohzaki, Megumi Fujimoto, Yoshitsugu Kojima, Toshio Kurauchi, Osami Kamigaito
  • Patent number: 4810734
    Abstract: Provided herein is a process for producing a composite material composed of a polymer and the layered silicate constituting the clay mineral being connected to the polymer through ionic bonding. The process comprises contacting a layered clay mineral with a swelling agent in the presence of a dispersion medium, thereby forming a complex, mixing said complex containing said dispersion medium with a monomer, and polymerizing said monomer contained in said mixture. The process permits the economical and efficient production of a composite material in which the layered silicate is uniformly dispersed.
    Type: Grant
    Filed: March 15, 1988
    Date of Patent: March 7, 1989
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Masaya Kawasumi, Masao Kohzaki, Yoshitsugu Kojima, Akane Okada, Osami Kamigaito