Patents by Inventor Tadakatsu Sugimoto

Tadakatsu Sugimoto 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).

  • Two blade type impulse wrench
    Patent number: 4920836
    Abstract: This invention relates to an impulse wrench which has two blades but generates only one impact pulse on the main shaft per one rotation of a liner. In this invention, a liner has at least four seals and a main shaft has at least two seals. And the shape of both or one of the two seals out of at least two seals of main shaft is other than a linear shape parallel to the axial center.If both of said two seals of main shaft are in said shape, two of at least four seals of liner are in the same shape. The other seals of liner are in a linear shape parallel to the axial center.If one of said two seals of main shaft is in said shape, one of at least four seals of liner is in the same shape as this. All of the other seals of liner are in a linear shape parallel to the axial center.In this way, said two seals of liner and said two seals of main shaft coincide with each other only once per one rotation of the liner.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: May 1, 1990
    Assignee: Yokota Industrial Co., Ltd.
    Inventors: Tadakatsu Sugimoto, Yoshiaki Igarashi, Shiro Saito, Eiichi Wada, Keiji Murai
  • Two-blade type impulse wrench
    Patent number: 4766787
    Abstract: This invention relates to an impulse wrench which has two blades but generates only one impact pulse on the main shaft per one rotation of a liner. In this invention, a liner has at least four seals and a main shaft has at least two seals. And the shape of both or one of the two seals out of at least two seals of main shaft is other than a linear shape parallel to the axial center.If both of said two seals of main shaft are in said shape, two of at least four seals of liner are in the same shape. The other seals of liner are in a linear shape parallel to the axial center.If one of said two seals of main shaft is in said shape, one of at least four seals of liner is in the same shape as this. All of the other seals of liner are in a linear shape parallel to the axial center.In this way, said two seals of liner and said two seals of main shaft coincide with each other only once per one rotation of the liner.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: August 30, 1988
    Assignee: Yokota Industrial Co., Ltd.
    Inventors: Tadakatsu Sugimoto, Yoshiaki Igarashi, Shiro Saito, Eiichi Wada, Keiji Murai