Patents by Inventor Masaru Yamakawa

Masaru Yamakawa 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).

  • Gripping mechanism, assembly apparatus and component
    Patent number: 11969884
    Abstract: A gripping mechanism (3) includes a gripping roller (32) and a holder (31) that houses the gripping roller (32). A gripped portion (42) of a first component (4) is gripped between an outer surface of the gripping roller (32) and an inner surface of the holder (31) through action of gravity acting on the gripping roller (32). Preferably, the gripping roller (32) includes a core (321) that is cylindrical or columnar in shape and a covering section (322) that is an elastic body covering a circumferential surface of the core (321). Preferably, the covering section (322) has a circumferential surface with a friction coefficient greater than a friction coefficient of the circumferential surface of the core (321).
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: April 30, 2024
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomohiko Yamakawa, Koji Izumi, Masaru Takagi, Hayato Mori
  • Method of constructing information correspondence pipe, constructed structure, and construction member
    Patent number: 7341403
    Abstract: The object is to provide a construction method of an information-communicable underground pipe whereby communication cables can be readily laid in an underground pipeline having a main pipe and branch pipes branched therefrom thereby allowing the underground pipeline to be used as an information-communicable underground pipe, and to provide a construction structure and a construction member therefor.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: March 11, 2008
    Assignees: Sanki Engineering Co., Ltd., Ashimori Industry Co., Ltd., Ashimori Engineering Co., Ltd.
    Inventors: Fumiaki Tsuchiya, Isaburo Yagi, Masaru Yamakawa, Yasuhiro Ueda, Osamu Ishizuka, Koji Aso, Yukikazu Maemoto, Takaaki Hirokawa, Hirofumi Nakatsuka
  • Method of constructing information correspondence pipe, constructed structure, and construction member
    Publication number: 20040253057
    Abstract: The object is to provide a construction method of an information-communicable underground pipe whereby communication cables can be readily laid in an underground pipeline having a main pipe and branch pipes branched therefrom thereby allowing the underground pipeline to be used as an information-communicable underground pipe, and to provide a construction structure and a construction member therefor.
    Type: Application
    Filed: February 25, 2004
    Publication date: December 16, 2004
    Inventors: Fumiaki Tsuchiya, Isaburo Yagi, Masaru Yamakawa, Yasuhiro Ueda
  • Boring device for lining material in branched portions of lined conduit
    Patent number: 5197540
    Abstract: The present invention relates to a boring device adapted to bore the lining material blocking a branched portion where there is an opening for connecting a main pipeline with a branched pipeline (33), after the inner surface of a pipe (31), such as a gas conduit, a city water conduit or a sewerage pipe, in particular, a conduit buried in the ground, has been lined with lining material (30) for maintenance, repairs and reinforcement purposes.The features of the boring device reside in improvements of the mode of attachment of the television camera (8) for projecting the position of the leading end of the borer (28) on its screen, the mode of attachment of the borer (28) to the body (9), the driving system of the borer (28), and also of the cutting blades of the borer (28) for cutting off the lining material.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: March 30, 1993
    Assignee: Ashimori Kogyo Kabushiki Kaisha
    Inventors: Isaburo Yagi, Hideo Maruyama, Masaru Yamakawa, Yoshifumi Osaka