Patents by Inventor Eisaku Oka

Eisaku Oka 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).

  • Patent number: 8230768
    Abstract: A miter saw having good workability without decrease in angle visibility is disclosed. The miter saw includes a display unit provided on a turntable. The display unit 600 is positioned between an operating handle protruding outward from the turntable and a rotation axis of the turntable. The display unit is positioned below the upper surfaces of a base and the turntable not so as to protrude above the upper surface of the turntable. The display unit displays an inclination angle of a circular saw blade with respect to the upper surface of the base and a rotation angle of the turntable with respect to the base in a line.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: July 31, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiromi Ozawa, Eisaku Oka, Nobuhiro Takano, Hideaki Terashima
  • Patent number: 7778796
    Abstract: A digital miter saw for cutting a workpiece includes a base, a member supported on the base and moveable relative to the base, and a cutting member moveable with the member. A detector is provided for detecting at least one of a miter angle and a bevel angle between the cutting member and the workpiece, and for outputting a signal indicative of the at least one detected angle, and a digital controller is provided which has an interface operable to receive the signal.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: August 17, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Eisaku Oka, Hiromi Ozawa, Yoshikazu Kawano, Kenrou Ishimaru, Tomoyuki Kawahara, Hiroyuki Saitou
  • Publication number: 20060149497
    Abstract: A digital miter saw for cutting a workpiece includes a base, a member supported on the base and moveable relative to the base, and a cutting member moveable with the member. A detector is provided for detecting at least one of a miter angle and a bevel angle between the cutting member and the workpiece, and for outputting a signal indicative of the at least one detected angle, and a digital controller is provided which has an interface operable to receive the signal.
    Type: Application
    Filed: March 1, 2006
    Publication date: July 6, 2006
    Inventors: Nobuhiro Takano, Eisaku Oka, Hiromi Ozawa, Yoshikazu Kawano, Kenrou Ishimaru, Tomoyuki Kawahara, Hiroyuki Saitou
  • Patent number: 7039548
    Abstract: A miter saw for displaying angle of a cutter blade cutting the workpiece. The miter saw has a base mounting a workpiece thereon, a movable member movably supported to the base, and a cutting unit connected to the movable member for supporting the cutter blade. A positioning portion is associated with the movable member and provides a predetermined nominal position of the movable member with respect to the base. The predetermined nominal position includes a reference position and other positions labeled angle. A detector detects the position of the movable member with respect to the base. A processor sets an angle between the reference position and the predetermined nominal position as a displayed moving amount when the movable member is positioned at the predetermined nominal position. Otherwise, the processor computes the moving amount based on the output signal from the detector.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: May 2, 2006
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Eisaku Oka, Hiromi Ozawa, Yoshikazu Kawano, Kenrou Ishimaru, Tomoyuki Kawahara, Hiroyuki Saitou
  • Publication number: 20050155477
    Abstract: A miter saw having good workability without decrease in angle visibility is disclosed. The miter saw includes a display unit provided on a turntable. The display unit 600 is positioned between an operating handle protruding outward from the turntable and a rotation axis of the turntable. The display unit is positioned below the upper surfaces of a base and the turntable not so as to protrude above the upper surface of the turntable. The display unit displays an inclination angle of a circular saw blade with respect to the upper surface of the base and a rotation angle of the turntable with respect to the base in a line.
    Type: Application
    Filed: January 18, 2005
    Publication date: July 21, 2005
    Inventors: Hiromi Ozawa, Eisaku Oka, Nobuhiro Takano, Hideaki Terashima
  • Publication number: 20050076760
    Abstract: A miter saw for displaying angle of a cutter blade cutting the workpiece. The miter saw has a base mounting a workpiece thereon, a movable member movably supported to the base, and a cutting unit connected to the movable member for supporting the cutter blade. A positioning portion is associated with the movable member and provides a predetermined nominal position of the movable member with respect to the base. The predetermined nominal position includes a reference position and other positions labeled angle. A detector detects the position of the movable member with respect to the base. A processor sets an angle between the reference position and the predetermined nominal position as a displayed moving amount when the movable member is positioned at the predetermined nominal position. Otherwise, the processor computes the moving amount based on the output signal from the detector.
    Type: Application
    Filed: October 8, 2004
    Publication date: April 14, 2005
    Inventors: Nobuhiro Takano, Eisaku Oka, Hiromi Ozawa, Yoshikazu Kawano, Kenrou Ishimaru, Tomoyuki Kawahara, Hiroyuki Saitou
  • Patent number: 6543323
    Abstract: The vice device includes a vice holder 24 composed of two side parts connected together at a given angle and, in these two side parts of the vice holder 24, there are respectively formed two holes 24a, 24b which extend at right angles to their associated side parts. By selectively switching these holes 24a, 24b over to each other, the pressing direction of a vice plate 26 can be changed.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: April 8, 2003
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Toshihiko Hayashizaki, Hiromi Ozawa, Eisaku Oka
  • Publication number: 20020007712
    Abstract: The vice device includes a vice holder 24 composed of two side parts connected together at a given angle and, in these two side parts of the vice holder 24, there are respectively formed two holes 24a, 24b which extend at right angles to their associated side parts. By selectively switching these holes 24a, 24b over to each other, the pressing direction of a vice plate 26 can be changed.
    Type: Application
    Filed: June 27, 2001
    Publication date: January 24, 2002
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Toshihiko Hayashizaki, Hiromi Ozawa, Eisaku Oka
  • Patent number: D328080
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: July 21, 1992
    Assignee: Hitachi Koki Haramachi Co., Ltd.
    Inventors: Eisaku Oka, Hiromi Ozawa, Yoshio Matsumoto, Yoshimasa Hayama