Patents by Inventor Siro Shirasaki

Siro Shirasaki 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).

  • Powder molding press
    Patent number: 5498147
    Abstract: A powder molding press a die plate provided with a die having a die hole, a punch device to be inserted into the die hole and a hydraulic cylinder device attached to the punch device for driving the same, the hydraulic cylinder device being arranged coaxially with the punch device. A movable punch plate may be disposed on one side of the die plate in parallel thereto with a predetermined space and a punch adapter for securing the punch device to the punch plate may be also disposed. The punch device includes a plurality of punches disposed axially in series.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: March 12, 1996
    Assignee: Yoshizuka Seiki Co., Ltd.
    Inventors: Takeshi Katagiri, Masao Yamamoto, Tukasa Tajima, Siro Shirasaki
  • Powder molding press
    Patent number: 5326242
    Abstract: A powder molding press includes a die plate provided with a die having a die hole, a punch device to be inserted into the die hole and a hydraulic cylinder device attached to the punch device for driving the same, the hydraulic cylinder device being arranged coaxially with the punch device. A movable punch plate may be disposed on one side of the die plate in parallel thereto with a predetermined space and a punch adapter for securing the punch device to the punch plate may be also disposed. The punch device includes a plurality of punches disposed axially in series.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: July 5, 1994
    Assignee: Yoshizuka Seiki Co., Ltd.
    Inventors: Takeshi Katagiri, Masao Yamamoto, Tukasa Tajima, Siro Shirasaki