Patents by Inventor Jyunichi Chajima

Jyunichi Chajima 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).

  • Friction clamping apparatus
    Patent number: 5226753
    Abstract: A friction clamping apparatus includes: a rod; a plurality of friction clamping units serially connected in the axial direction of the rod, each of the friction clamping units including a radially elastically transformable sleeve and a ram into which the sleeve is fittingly inserted, the rod being fittingly inserted through the respective sleeves of the friction clamping units; and restraint pressure chambers defined by an inner circumferential surfaces of the ram and outer circumferential surfaces of the sleeve respectively, so that an oil pressure is made to act upon the restraint pressure chambers to restrain the rod with the sleeves or the oil pressure is made so as not to act upon the restraint pressure chambers to release the rod from the sleeves.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: July 13, 1993
    Assignee: The Japan Steel Works Ltd.
    Inventors: Jyunichi Chajima, Toshio Nakayama
  • Friction clamping apparatus
    Patent number: 5178480
    Abstract: A friction clamping apparatus includes: a rod; a plurality of friction clamping units serially connected in the axial direction of the rod, each of the friction clamping units including a radially elastically transformable sleeve and a ram into which the sleeve is fittingly inserted, the rod being fittingly inserted through the respective sleeves of the friction clamping units; and restraint pressure chambers defined by an inner circumferential surfaces of the ram and outer circumferential surfaces of the sleeve respectively, so that an oil pressure is made to act upon the restraint pressure chambers to restrain the rod with the sleeves or the oil pressure is made so as not to act upon the restraint pressure chambers to release the rod from the sleeves.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: January 12, 1993
    Assignee: The Japan Steel Works Ltd.
    Inventors: Jyunichi Chajima, Toshio Nakayama