Patents by Inventor Toshio Kizawa

Toshio Kizawa 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).

  • Pipe handling apparatus for oil drilling operations
    Patent number: 4610315
    Abstract: This invention relates to a pipe handling apparatus for oil drilling operations, which is designed so as to handle simply without errors the pipes used for oil drilling operations, and which is provided with a pipe transfer unit for transferring a pipe mechanically between a pipe storage space and the oil well center, a pipe lift unit capable of lowering a pipe, which has been carried to the oil well center by the pipe transfer unit, thereinto and withdrawing a pipe from the oil well center, and a pipe transfer unit for transferring a pipe, which has been withdrawn from the oil well center by the pipe lift unit, to a pipe rack unit automatically so as to store the pipe therein.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: September 9, 1986
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Minoru Koga, Toshio Kizawa, Toshio Hirose