Patents by Inventor Kazuyoshi Date

Kazuyoshi Date 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).

  • Regulating cylinder unit in a single-crystal pulling apparatus and a jig for installing them
    Patent number: 5928422
    Abstract: Regulating cylinder unit is divided into three parts, a third regulating cylinder shaped essentially like a cylinder and installed on the protection cylinder; a first regulating cylinder and a second regulating cylinder which are shaped like reversed truncated cones with different diameters and are capable of engaging with the third regulating cylinder. In addition, the second and third regulating cylinders are brought together in a preset ordering, that is, a flange formed at the outer peripheral rim of the upper end of the second regulating cylinder is engaged with a stepped portion of the third regulating cylinder, and a flange formed at the outer peripheral rim of the upper end of the first regulating cylinder is engaged with a flange formed at the inner peripheral rim of the lower end of the second regulating cylinder.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: July 27, 1999
    Assignee: Komatsu Electronic Metals Co., Ltd.
    Inventors: Teruhiko Uchiyama, Yoshiyuki Suzuki, Kazuyoshi Date