Patents by Inventor Ryoji Tokieda

Ryoji Tokieda 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).

  • Method for brazing metal components for use in medical equipment, metal assembly produced by the method and endoscope provided with the metal assembly
    Patent number: 7347355
    Abstract: A method for brazing two or more of stainless steel components for use in medical equipment, in which one component is joined to other component using a brazing material containing Au of which amount is 62.5 wt % or higher, the method comprising the steps of: a first step in which the components are subjected to a heat treatment at a temperature of 1,050 to 1,200° C. in a hydrogen containing atmosphere or in a vacuum; a second step in which one of the components is allowed to close to the other component so as to form a gap therebetween; and a third step in which the brazing material in a molten state is supplied into the gap to join the components together to manufacture a metal assembly. The joint portions formed in the metal assembly have excellent chemical resistance and corrosion resistance, and thus the metal assembly is suitably used in an endoscope.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: March 25, 2008
    Assignees: PENTAX Corporation, Shinwa Heat Treatment Co., Ltd.
    Inventors: Yasuyuki Sato, Yoshihiro Obata, Wataru Murai, Ryoji Tokieda, Naoki Kamiya, Hideo Shimizu
  • Method for brazing metal components for use in medical equipment, metal assembly produced by the method and endoscope provided with the metal assembly
    Publication number: 20050077343
    Abstract: A method for brazing two or more of stainless steel components for use in medical equipment, in which one component is joined to other component using a brazing material containing Au of which amount is 62.5 wt % or higher, the method comprising the steps of: a first step in which the components are subjected to a heat treatment at a temperature of 1,050 to 1,200° C. in a hydrogen containing atmosphere or in a vacuum; a second step in which one of the components is allowed to close to the other component so as to form a gap therebetween; and a third step in which the brazing material in a molten state is supplied into the gap to join the components together to manufacture a metal assembly. The joint portions formed in the metal assembly have excellent chemical resistance and corrosion resistance, and thus the metal assembly is suitably used in an endoscope.
    Type: Application
    Filed: August 23, 2004
    Publication date: April 14, 2005
    Applicants: PENTAX Corporation, SHINWA HEAT TREATMENT CO., LTD.
    Inventors: Yasuyuki Sato, Yoshihiro Obata, Wataru Murai, Ryoji Tokieda, Naoki Kamiya, Hideo Shimizu