Patents by Inventor Tomio Ishikawa

Tomio Ishikawa 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).

  • Safety device for backward movement of vibration roller
    Patent number: 7416365
    Abstract: The present invention provides a safety device of vibration roller wherein a travel switching device of the roller is switched to a neutral position automatically and the roller stops automatically when the operator is caught between the roller and an obstacle, and a safety switch is activated, even if the travel lever is placed in the reverse position continuously. A back end (16a) of an outer tube of an operation cable (7) is locked in front of the travel lever (4) in the case (2) when a safety switch (22) is not activated, the back end (16a) of the outer tube is released and displaced to a direction of the travel lever (4) when the safety switch (22) is activated.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: August 26, 2008
    Assignee: Mikasa Sangyo Co., Ltd.
    Inventors: Hideki Mochigi, Tomio Ishikawa
  • Safety device for backward movement of vibration roller
    Publication number: 20050254898
    Abstract: The present invention provides a safety device of vibration roller wherein a travel switching device of the roller is switched to a neutral position automatically and the roller stops automatically when the operator is caught between the roller and an obstacle, and a safety switch is activated, even if the travel lever is placed in the reverse position continuously. A back end (16a) of an outer tube of an operation cable (7) is locked in front of the travel lever (4) in the case (2) when a safety switch (22) is not activated, the back end (16a) of the outer tube is released and displaced to a direction of the travel lever (4) when the safety switch (22) is activated.
    Type: Application
    Filed: June 18, 2003
    Publication date: November 17, 2005
    Applicant: Mikasa Sangyo Col, Ltd.
    Inventors: Hideki Mochigi, Tomio Ishikawa