Patents by Inventor Tatsuo Shimakawa

Tatsuo Shimakawa 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).

  • Gasket for cylinder head
    Patent number: 9127768
    Abstract: A gasket for arrangement between a cylinder block and cylinder head of an internal combustion engine. The gasket includes a lubricant hole through which lubricant is supplied to the cylinder head. A high pressure bead extends around the lubricant hole. A low pressure bead is extends around the high pressure bead and at least partially extends around a hollow portion, which is in communication with a lubricant reservoir of the engine, when the gasket is arranged between the cylinder block and the cylinder head.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: September 8, 2015
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, TOYOTA JIDOSHA KABUSHIKI KAISHA, ISHIKAWA GASKET CO., LTD.
    Inventors: Keisuke Nishimura, Tatsuo Shimakawa, Yoshinori Kodera, Kisho Yasuda
  • GASKET FOR CYLINDER HEAD
    Publication number: 20110163508
    Abstract: A gasket for arrangement between a cylinder block and cylinder head of an internal combustion engine. The gasket includes a lubricant hole through which lubricant is supplied to the cylinder head. A high pressure bead extends around the lubricant hole. A low pressure bead is extends around the high pressure bead and at least partially extends around a hollow portion, which is in communication with a lubricant reservoir of the engine, when the gasket is arranged between the cylinder block and the cylinder head.
    Type: Application
    Filed: January 4, 2011
    Publication date: July 7, 2011
    Applicants: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, TOYOTA JIDOSHA KABUSHIKI KAISHA, ISHIKAWA GASKET CO., LTD.
    Inventors: Keisuke NISHIMURA, Tatsuo Shimakawa, Yoshinori Kodera, Kisho Yasuda
  • Fluid passage structure of internal combustion engine
    Patent number: 6901891
    Abstract: In a fluid passage structure of an internal combustion engine wherein oil flows from an in-block flow passage formed in a cylinder block to an in-head flow passage formed in a cylinder head, a groove that is generally rectangular in cross section is so formed in a top face of the cylinder block as to extend from a position corresponding to an opening of the in-block flow passage formed in the top face to a position corresponding to an opening of the in-head flow passage formed in a bottom face of the cylinder head, by machining or the like. Thus, a flow passage arrangement in which the openings of the flow passages are offset from each other is allowed. As a result, the degree of freedom in designing the fluid passage structure is enhanced.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: June 7, 2005
    Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masao Suzuki, Tatsuo Shimakawa
  • Fluid passage structure of internal combustion engine
    Publication number: 20040083990
    Abstract: In a fluid passage structure of an internal combustion engine wherein oil flows from an in-block flow passage formed in a cylinder block to an in-head flow passage formed in a cylinder head, a groove that is generally rectangular in cross section is so formed in a top face of the cylinder block as to extend from a position corresponding to an opening of the in-block flow passage formed in the top face to a position corresponding to an opening of the in-head flow passage formed in a bottom face of the cylinder head, by machining or the like. Thus, a flow passage arrangement in which the openings of the flow passages are offset from each other is allowed. As a result, the degree of freedom in designing the fluid passage structure is enhanced.
    Type: Application
    Filed: October 29, 2003
    Publication date: May 6, 2004
    Inventors: Masao Suzuki, Tatsuo Shimakawa