Patents by Inventor Teizou Suzuki

Teizou 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).

  • Cutter head, tunnel excavating machine, and cutter replacing method
    Patent number: 6382732
    Abstract: A cutter head is rotationally drivably mounted on a front portion of a tunnel excavating machine body, a plurality of cutter spokes are provided radially on the cutter head, a plurality of mounting holes are formed in a front surface portion of each of the cutter spokes, a valve plate is turnably mounted and has through-holes formed in correspondence with the mounting holes, relay bits are mounted movably to the through-holes and the mounting holes and rearwardly withdrawably, the relay bit can be fixed by bolts at a position at which the relay bit protrudes from the front surface portion of the cutter spoke, and when the relay bit is withdrawn rearward from the mounting hole, the valve plate is turned to close the mounting hole, whereafter the relay bit is detached and can be replaced.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: May 7, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Junichi Tanaka, Mitsunori Tsuda, Hisaya Nakada, Syuichi Setsukinai, Teizou Suzuki