Patents by Inventor Yuzo MINOWA

Yuzo MINOWA 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).

  • Water-resistant structure of a lens barrel
    Patent number: 8508873
    Abstract: A water-resistant structure of a lens barrel includes a sealing member that seals an annular gap between inner and outer annular members, wherein the sealing member is positioned in a vicinity of an open end of the outer annular member and is fixed to one of the inner and outer annular members to be slidable on the other of the inner and outer annular members, and a drain groove formed on the inner annular member and positioned alongside the sealing member at a position closer to the open end of the outer annular member than the sealing member. Furthermore, a frictional resistance of a first sealing member produced between a secondary annular member and a manually-rotatable annular members is greater than a frictional resistance of the second sealing member that urges one of two of the manually-rotatable annular members to follow a rotation of the other thereof when rotated.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: August 13, 2013
    Assignee: Pentax Ricoh Imaging Company, Ltd.
    Inventors: Makoto Iikawa, Yuji Kogure, Yuzo Minowa, Toshiyuki Irie
  • WATER-RESISTANT STRUCTURE OF A LENS BARREL
    Publication number: 20100214679
    Abstract: A water-resistant structure of a lens barrel includes a sealing member that seals an annular gap between inner and outer annular members, wherein the sealing member is positioned in a vicinity of an open end of the outer annular member and is fixed to one of the inner and outer annular members to be slidable on the other of the inner and outer annular members, and a drain groove formed on the inner annular member and positioned alongside the sealing member at a position closer to the open end of the outer annular member than the sealing member. Furthermore, a frictional resistance of a first sealing member produced between a secondary annular member and a manually-rotatable annular members is greater than a frictional resistance of the second sealing member that urges one of two of the manually-rotatable annular members to follow a rotation of the other thereof when rotated.
    Type: Application
    Filed: February 23, 2010
    Publication date: August 26, 2010
    Applicant: HOYA CORPORATION
    Inventors: Makoto IIKAWA, Yuji KOGURE, Yuzo MINOWA, Toshiyuki IRIE