Patents by Inventor Keitarou Emura

Keitarou Emura 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).

  • Resin seal ring and manufacturing method
    Patent number: 8028997
    Abstract: The present invention provides a seal ring which can be prevented from being broken by an expansion and a shock applied thereto when the seal ring is fitted on a rotary shaft and does not have a configurative disadvantage such as a burr. Therefore no post-processing is required. The present invention also provides materials of the seal ring and a method of manufacturing the seal ring. The seal ring is made of resin and having two abutments confronting each other and a gate mark formed in an injection molding operation.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: October 4, 2011
    Assignee: NTN Corporation
    Inventors: Eiichirou Shimazu, Keitarou Emura, Masaki Egami
  • Resin seal ring and manufacturing method
    Publication number: 20090243224
    Abstract: The present invention provides a seal ring which can be prevented from being broken by an expansion and a shock applied thereto when the seal ring is fitted on a rotary shaft and does not have a configurative disadvantage such as a burr. Therefore no post-processing is required. The present invention also provides materials of the seal ring and a method of manufacturing the seal ring. The seal ring is made of resin and having two abutments confronting each other and a gate mark formed in an injection molding operation.
    Type: Application
    Filed: June 4, 2009
    Publication date: October 1, 2009
    Applicant: NTN CORPORATION
    Inventors: Eiichirou Shimazu, Keitarou Emura, Masaki Egami
  • Resin seal ring and manufacturing method
    Patent number: 7559555
    Abstract: The present invention provides a seal ring which can be prevented from being broken by an expansion and a shock applied thereto when the seal ring is fitted on a rotary shaft and does not have a configurative disadvantage such as a burr. Therefore no post-processing is required. The present invention also provides materials of the seal ring and a method of manufacturing the seal ring. The seal ring is made of resin and having two abutments confronting each other and a gate mark formed in an injection molding operation.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: July 14, 2009
    Assignee: NTN Corporation
    Inventors: Eiichirou Shimazu, Keitarou Emura, Masaki Egami
  • Resin seal ring and manufacturing method
    Publication number: 20040251634
    Abstract: The present invention provides a seal ring which can be prevented from being broken by an expansion and a shock applied thereto when the seal ring is fitted on a rotary shaft and does not have a configurative disadvantage such as a burr. Therefore no post-processing is required. The present invention also provides materials of the seal ring and a method of manufacturing the seal ring. The seal ring is made of resin and having two abutments confronting each other and a gate mark formed in an injection molding operation.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 16, 2004
    Inventors: Eiichirou Shimazu, Keitarou Emura, Masaki Egami