Patents by Inventor Ryokuya Suzuki

Ryokuya Suzuki 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).

  • Drilling system and method of pulling it up
    Patent number: 3952816
    Abstract: A drilling system includes a drill pipe and a cutting means located therein. A locking mechanism with said drill pipe is provided on said cutting means and is operatively connected with a spearhead engageable with an engaging mechanism of a pulling-up device so that, when the spearhead is pulled, an inner tube and outer tube forming a part of the locking mechanism may move relative to each other to unlock the drill pipe and cutting means for quickly and easily pulling up the latter.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: April 27, 1976
    Assignee: Sumitomo Metal Mining Company Limited
    Inventors: Sho Takano, Yasushi Okuyama, Ryokuya Suzuki, Ikuma Kinoshita