Patents by Inventor Toshihiko Hayashizaki

Toshihiko Hayashizaki 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: 8161859
    Abstract: A miter saw which prevents deterioration in perpendicularity of a cutting blade to the upper surface of a base part when slide of a pipe is regulated by pressing a pipe. In a miter saw, a pair of pipes support a cutting part, on one end side. On the other end side, the pipes are surrounded and supported slidably by a first slide support part of a support member of a turntable. A virtual plane including the axes of the pair of pipes is substantially parallel to the pivotal direction of a disc saw blade. A first screw is screwed in the first slide support part. An end part of the first screw contacts and presses a pipe. This end part is engaged with the pipe so as to restrict slide of the pipe relative to the first slide support part.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: April 24, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Toshihiko Hayashizaki
  • Patent number: 8127650
    Abstract: A miter saw includes a base unit, a cutting unit having a rotary cutting blade, a motor for driving the rotary cutting blade, and a housing having a blade cover for covering a part of the cutting blade and a motor housing connected to the blade cover, a supporting unit supported to the base unit for pivotably supporting the cutting unit, the supporting unit being configured to move the cutting unit toward and away from the base unit in a first direction, the supporting unit including a guide unit supported with respect to the base unit, and a sliding unit having a pivot shaft pivotably supporting the cutting unit, the sliding unit being slidable on the guide unit to move between a front position and a rear position in the second direction and the pivot shaft extending in a third direction which is perpendicular to the first and second directions.
    Type: Grant
    Filed: February 19, 2007
    Date of Patent: March 6, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Kenichi Matsunaga, Toshihiko Hayashizaki
  • Patent number: 8047111
    Abstract: A miter saw including a base, a turntable, a support section extending from the turntable, and a circular saw unit supported to the support section. An adjustment mechanism is provided between the base and the turntable for performing fine-adjustment to the rotation angle of the turntable relative to the base. The adjustment mechanism is located at a front side of the turntable, and a digital display is provided near the adjustment mechanism for displaying the rotation angle.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: November 1, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Hiromi Ozawa, Toshihiko Hayashizaki
  • Patent number: 7905167
    Abstract: A miter saw which prevents deterioration in perpendicularity of a cutting blade to the upper surface of a base part when slide of a pipe is regulated by pressing a pipe. In a miter saw, a pair of pipes support a cutting part, on one end side. On the other end side, the pipes are surrounded and supported slidably by a first slide support part of a support member of a turntable. A virtual plane including the axes of the pair of pipes is substantially parallel to the pivotal direction of a disc saw blade. A first screw is screwed in the first slide support part. An end part of the first screw contacts and presses a pipe. This end part is engaged with the pipe so as to restrict slide of the pipe relative to the first slide support part.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: March 15, 2011
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Toshihiko Hayashizaki
  • Publication number: 20110041665
    Abstract: A miter saw which prevents deterioration in perpendicularity of a cutting blade to the upper surface of a base part when slide of a pipe is regulated by pressing a pipe. In a miter saw, a pair of pipes support a cutting part, on one end side. On the other end side, the pipes are surrounded and supported slidably by a first slide support part of a support member of a turntable. A virtual plane including the axes of the pair of pipes is substantially parallel to the pivotal direction of a disc saw blade. A first screw is screwed in the first slide support part. An end part of the first screw contacts and presses a pipe. This end part is engaged with the pipe so as to restrict slide of the pipe relative to the first slide support part.
    Type: Application
    Filed: November 2, 2010
    Publication date: February 24, 2011
    Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Toshihiko Hayashizaki
  • Publication number: 20090031875
    Abstract: A miter saw has a base unit, a cutting unit, and a supporting unit. The base unit supports a workpiece. The cutting unit has a rotary cutting blade having two side faces, a motor for driving the rotary cutting blade, and a housing having a blade cover for covering a part of the cutting blade and a motor housing provided to the blade cover on one side face of the rotary cutting blade for accommodating the motor. The supporting unit is supported to the base unit for pivotably supporting the cutting unit. The supporting unit is configured to move the cutting unit toward and away from the base unit in a first direction. The support unit has a guide unit supported to the base unit, and a sliding unit having a pivot shaft pivotably supporting the cutting unit. The guide unit extends parallel to a second direction and having a front end. The sliding unit is guided by the guide unit to move between a front position and a rear position in the second direction.
    Type: Application
    Filed: February 19, 2007
    Publication date: February 5, 2009
    Applicant: HITACHI KOKI, CO., LTD.
    Inventors: Shigeharu Ushiwata, Kenichi Matsunaga, Toshihiko Hayashizaki
  • Publication number: 20060156888
    Abstract: A miter saw which prevents deterioration in perpendicularity of a cutting blade to the upper surface of a base part when slide of a pipe is regulated by pressing a pipe. In a miter saw, a pair of pipes support a cutting part, on one end side. On the other end side, the pipes are surrounded and supported slidably by a first slide support part of a support member of a turntable. A virtual plane including the axes of the pair of pipes is substantially parallel to the pivotal direction of a disc saw blade. A first screw is screwed in the first slide support part. An end part of the first screw contacts and presses a pipe. This end part is engaged with the pipe so as to restrict slide of the pipe relative to the first slide support part.
    Type: Application
    Filed: January 19, 2006
    Publication date: July 20, 2006
    Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Toshihiko Hayashizaki
  • Publication number: 20060011036
    Abstract: A miter saw including a base, a turntable, a support section extending from the turntable, and a circular saw unit supported to the support section. An adjustment mechanism is provided between the base and the turntable for performing fine-adjustment to the rotation angle of the turntable relative to the base. The adjustment mechanism is located at a front side of the turntable, and a digital display is provided near the adjustment mechanism for displaying the rotation angle.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 19, 2006
    Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Hiromi Ozawa, Toshihiko Hayashizaki
  • Publication number: 20060005676
    Abstract: A miter saw including a base section, a support section extending from the base section, and a circular saw unit supported to the support section and having a handle and a motor housing. The circular saw unit rotatably supports a circular saw blade. A digital display is provided at an upper portion and a front side of the motor housing. The digital display displays a first angle of a side surface of the circular saw blade relative to a fence, and/or a second angle of the side surface relative to the upper surface of the base section.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 12, 2006
    Inventors: Hideaki Terashima, Shigeharu Ushiwata, Hiromi Ozawa, Ryuichi Imamura, Toshihiko Hayashizaki
  • 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