Patents by Inventor Hidemi Horimoto

Hidemi Horimoto 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).

  • Method for inserting balls and spacers into ball screw device
    Patent number: 6643932
    Abstract: A ball screw device utilizes spacers having concave ball-contacting surfaces with distributed protrusions or dimples. Balls having needle-like recesses may also be used. The spacers are provided in two thicknesses, and the relative numbers of the thinner and thicker spacers are selected in order to ensure retention of the spacers in their proper positions, while providing a small clearance between the balls and spacers to avoid fluctuations or sharp increases in dynamic torque.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: November 11, 2003
    Assignee: Tsubaki Nakashima Co., Ltd.
    Inventors: Hiroyuki Takagi, Hidemi Horimoto, Soichiro Ohga
  • Method for inserting balls and spacers into ball screw device
    Publication number: 20020139209
    Abstract: A ball screw device utilizes spacers having concave ball-contacting surfaces with distributed protrusions or dimples. Balls having needle-like recesses may also be used. The spacers are provided in two thicknesses, and the relative numbers of the thinner and thicker spacers are selected in order to ensure retention of the spacers in their proper positions, while providing a small clearance between the balls and spacers to avoid fluctuations or sharp increases in dynamic torque.
    Type: Application
    Filed: May 23, 2002
    Publication date: October 3, 2002
    Applicant: Tsubaki Nakashima Co., Ltd.
    Inventors: Hiroyuki Takagi, Hidemi Horimoto, Soichiro Ohga
  • Ball screw device having spacers
    Patent number: 6415676
    Abstract: A ball screw device utilizes spacers having concave ball-contacting surfaces with distributed protrusions or dimples. Balls having needle-like recesses may also be used. The spacers are provided in two thicknesses, and the relative numbers of the thinner and thicker spacers are selected in order to ensure retention of the spacers in their proper positions, while providing a small clearance between the balls and spacers to avoid fluctuations or sharp increases in dynamic torque.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: July 9, 2002
    Assignee: Tsubaki Nakashima Co., Ltd.
    Inventors: Hirouyki Takagi, Hidemi Horimoto, Soichiro Ohga
  • Linear guideway having spacers and spacer ball
    Patent number: 6113274
    Abstract: Spacers 10 of the same size are each disposed between adjacent ones of balls 6 which are loaded into each of endless circulation paths 8 formed in a carriage 3, and a spacer ball 12 having a diameter slightly smaller than a nominal diameter of each of the balls is disposed in a gap formed between the ball positioned at a start end as a start-end ball 6A and the ball positioned at a terminal end as a terminal-end ball 6B.Both axial end faces of each spacer 10 are formed as concave faces 20 conforming to the spherical surface of each ball 6 and thus there is no fear of disengagement of the spacers 10 and the balls 6 from each other during rolling of the balls.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: September 5, 2000
    Assignee: Tsubaki Nakashima Co., Ltd.
    Inventor: Hidemi Horimoto