Patents by Inventor Takio Kojima

Takio Kojima 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).

  • Metal piston and ceramic piston pin assembly
    Patent number: 4796517
    Abstract: A piston pin made of ceramics is journalled in piston bosses of a piston made of aluminium alloy. Intermediate members are installed in bearing bores to receive therein terminal end portions of the piston pin. The intermediate members are made of metal which is intermediate in thermal expansion coefficient between the aluminium alloy forming the piston and the ceramics forming the piston pin.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: January 10, 1989
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Shigeaki Akao, Mitsuyoshi Kawamura, Takio Kojima
  • Lubrication mechanism for piston pin and snap ring
    Patent number: 4785720
    Abstract: A piston boss is formed with an oil inlet hole for collecting oil flowing downward along a piston and allowing it to flow toward a snap ring and an end of a ceramic piston pin in contact with the snap ring. The oil having lubricated the snap ring and the end of the piston pin is collected by an oil outlet hole formed in the piston boss and allowed to flow downward therethrough.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: November 22, 1988
    Assignee: NKG Spark Plug Co., Ltd.
    Inventors: Takio Kojima, Mitsuyoshi Kawamura, Shigeaki Akao
  • Mounting structure for ceramic sub-combustion chambers
    Patent number: 4704998
    Abstract: A structure for mounting a ceramic sub-combustion chamber unit which is formed of a chamber element and a mouthpiece element as a unit. The sub-combustion chamber unit being mounted by gasket each of which is of U-shaped cross section on mounting hole formed in a cylinder head.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: November 10, 1987
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takio Kojima, Masato Taniguchi
  • Ceramic auxiliary combustion chamber
    Patent number: 4691673
    Abstract: A ceramic auxiliary combustion chamber for an internal combustion engine where a ceramic nozzle body with an integrally fitted gasket is mounted into an opening in the cylinder head.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: September 8, 1987
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takio Kojima, Masato Taniguchi