Patents by Inventor Kyohei MATSUNAGA

Kyohei MATSUNAGA 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: 11092193
    Abstract: In an angular ball bearing (10), an outer race (12) has at least one diameter-directional hole (15) that supplies lubricating oil and passes through from the outer circumferential surface to the inner circumferential surface along the diameter direction. In a cross-section taken along the axial direction passing through a center (O) of the ball (13), the axial-directional position of a line extending through a central axis (X) of the diameter-directional hole (15) in the outer circumferential surface of a retainer (14) is located between an intersection position (A), at which an outer circumferential surface (14a) of the retainer (14) and a surface of a ball (13) intersect, and an axial-directional end (B) of a pocket (P).
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: August 17, 2021
    Assignee: NSK LTD.
    Inventors: Kyohei Matsunaga, Yoshiaki Katsuno
  • Publication number: 20210148400
    Abstract: In an angular ball bearing (10), an outer race (12) has at least one diameter-directional hole (15) that supplies lubricating oil and passes through from the outer circumferential surface to the inner circumferential surface along the diameter direction. In a cross-section taken along the axial direction passing through a center (O) of the ball (13), the axial-directional position of a line extending through a central axis (X) of the diameter-directional hole (15) in the outer circumferential surface of a retainer (14) is located between an intersection position (A), at which an outer circumferential surface (14a) of the retainer (14) and a surface of a ball (13) intersect, and an axial-directional end (B) of a pocket (P).
    Type: Application
    Filed: August 10, 2017
    Publication date: May 20, 2021
    Applicant: NSK LTD.
    Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
  • Patent number: 10746227
    Abstract: When inner diameter side opening portions are projected on an outer circumferential surface of a retainer along extension lines of central lines of radial holes, at least parts of the inner diameter side opening portions of a plurality of radial holes of an outer ring are positioned within an area of two circles formed by connecting each of axial end portions of adjacent pockets of the retainer in an axial direction. When a central line of any one radial hole coincides with a circumferential phase of a center of a ball, any other radial hole is formed such that the projected inner diameter side opening portion is separated from the ball and an inner circumferential surface of the pocket when viewed from the radial direction of the ball bearing, and a central line of the other radial hole overlaps with the pocket when viewed from the axial direction.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: August 18, 2020
    Assignee: NSK LTD.
    Inventors: Ryosuke Amano, Yoshiaki Katsuno, Kyohei Matsunaga
  • Publication number: 20200217366
    Abstract: When inner diameter side opening portions are projected on an outer circumferential surface of a retainer along extension lines of central lines of radial holes, at least parts of the inner diameter side opening portions of a plurality of radial holes of an outer ring are positioned within an area of two circles formed by connecting each of axial end portions of adjacent pockets of the retainer in an axial direction. When a central line of any one radial hole coincides with a circumferential phase of a center of a ball, any other radial hole is formed such that the projected inner diameter side opening portion is separated from the ball and an inner circumferential surface of the pocket when viewed from the radial direction of the ball bearing, and a central line of the other radial hole overlaps with the pocket when viewed from the axial direction.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 9, 2020
    Applicant: NSK LTD.
    Inventors: Ryosuke AMANO, Yoshiaki KATSUNO, Kyohei MATSUNAGA
  • Patent number: 10690180
    Abstract: When inner diameter side opening portions are projected on an outer circumferential surface of a retainer along extension lines of central lines of radial holes, at least parts of the inner diameter side opening portions of a plurality of radial holes of an outer ring are positioned within an area of two circles formed by connecting each of axial end portions of adjacent pockets of the retainer in an axial direction. When a central line of any one radial hole coincides with a circumferential phase of a center of a ball, any other radial hole is formed such that at least parts of the projected inner diameter side opening portion overlap with an inner circumferential surface of the pocket when viewed from a radial direction of a ball bearing, and a central line of the other radial hole is separated from a circumferential phase of the center.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 23, 2020
    Assignee: NSK LTD.
    Inventors: Ryosuke Amano, Yoshiaki Katsuno, Kyohei Matsunaga
  • Patent number: 10670078
    Abstract: When inner diameter side opening portions are projected on an outer circumferential surface of a retainer along extension lines of central lines of radial holes, at least parts of the inner diameter side opening portions of a plurality of radial holes of an outer ring are positioned within an area of two circles formed by connecting each of axial end portions of adjacent pockets of the retainer in an axial direction. When a central line of any one radial hole coincides with a circumferential phase of a center of a ball, any other radial hole is formed such that the projected inner diameter side opening portion is separated from the ball and an inner circumferential surface of the pocket when viewed from the radial direction of the ball bearing, and a central line of the other radial hole overlaps with the pocket when viewed from the axial direction.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 2, 2020
    Assignee: NSK LTD.
    Inventors: Ryosuke Amano, Yoshiaki Katsuno, Kyohei Matsunaga
  • Patent number: 10634186
    Abstract: In an angular contact ball bearing (10), an outer ring (12) has at least one radial hole (15) passing through in the radial direction from the outer peripheral surface to the inner peripheral surface of the outer ring (12), and the axial-direction position of an inner-diameter-side opening part of the radial hole (15) is located between the groove bottom of the outer ring (12) and the point of contact between a ball (13) and the outer ring (12), as well as being separated from a contact ellipse between the ball (13) and an outer ring track groove (12a).
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 28, 2020
    Assignee: NSK LTD.
    Inventors: Kyohei Matsunaga, Yoshiaki Katsuno
  • Publication number: 20190211874
    Abstract: Provided is a bearing device (1) wherein an outer ring (12) of an angular contact ball bearing (10) has at least one supply hole (15) for supplying a lubricating oil, and an outer ring spacer (30) comprises, on the inner peripheral surface thereof, a tapered surface (32) which increases in diameter with the distance from an axial end surface (31) contacting the outer ring (12), the outer ring spacer (30) also comprising a discharge hole (34) which passes therethrough in the radial direction and through which the lubricating oil is discharged. Further, the inner diameter dimension (D31) of the axial end surface (31) of the outer ring spacer (30) is set to be equal to or larger than the inner diameter dimension (D12e) of an axial other side end surface (12e) of the outer ring (12) contacting the outer ring spacer (30).
    Type: Application
    Filed: August 10, 2017
    Publication date: July 11, 2019
    Applicant: NSK LTD.
    Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
  • Publication number: 20190195276
    Abstract: When inner diameter side opening portions are projected on an outer circumferential surface of a retainer along extension lines of central lines of radial holes, at least parts of the inner diameter side opening portions of a plurality of radial holes of an outer ring are positioned within an area of two circles formed by connecting each of axial end portions of adjacent pockets of the retainer in an axial direction. When a central line of any one radial hole coincides with a circumferential phase of a center of a ball, any other radial hole is formed such that at least parts of the projected inner diameter side opening portion overlap with an inner circumferential surface of the pocket when viewed from a radial direction of a ball bearing, and a central line of the other radial hole is separated from a circumferential phase of the center.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 27, 2019
    Applicant: NSK LTD.
    Inventors: Ryosuke AMANO, Yoshiaki KATSUNO, Kyohei MATSUNAGA
  • Publication number: 20190186546
    Abstract: When inner diameter side opening portions are projected on an outer circumferential surface of a retainer along extension lines of central lines of radial holes, at least parts of the inner diameter side opening portions of a plurality of radial holes of an outer ring are positioned within an area of two circles formed by connecting each of axial end portions of adjacent pockets of the retainer in an axial direction. When a central line of any one radial hole coincides with a circumferential phase of a center of a ball, any other radial hole is formed such that the projected inner diameter side opening portion is separated from the ball and an inner circumferential surface of the pocket when viewed from the radial direction of the ball bearing, and a central line of the other radial hole overlaps with the pocket when viewed from the axial direction.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 20, 2019
    Applicant: NSK LTD.
    Inventors: Ryosuke AMANO, Yoshiaki KATSUNO, Kyohei MATSUNAGA
  • Publication number: 20190178291
    Abstract: An angular contact ball bearing (10) is configured such that: an outer ring (12) thereof includes at least one radial hole (15) that extends radially through the outer ring (12) from an outer circumferential surface thereof to an inner circumferential surface thereof; and when a minor angle formed relative to a rotation axis (s) of a ball (13) by a straight line that connects a center (O) of the ball (13) and an intersection point between a centerline (X) of the radial hole (15) and a surface of the ball (13) is defined as ?, an axial position of the centerline (X) of the radial hole (15) is set to satisfy a relationship of 0°<??60°.
    Type: Application
    Filed: July 26, 2017
    Publication date: June 13, 2019
    Applicant: NSK LTD.
    Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
  • Publication number: 20190170187
    Abstract: In an angular contact ball bearing (10), an outer ring (12) has at least one radial hole (15) passing through in the radial direction from the outer peripheral surface to the inner peripheral surface of the outer ring (12), and the axial-direction position of an inner-diameter-side opening part of the radial hole (15) is located between the groove bottom of the outer ring (12) and the point of contact between a ball (13) and the outer ring (12), as well as being separated from a contact ellipse between the ball (13) and an outer ring track groove (12a)
    Type: Application
    Filed: August 10, 2017
    Publication date: June 6, 2019
    Applicant: NSK LTD.
    Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
  • Patent number: 10184515
    Abstract: In an angular ball bearing, an outer ring is provided with a plurality of oil holes. The circumferential phases of the plurality of oil holes are ??45°, when the angular rolling bearing is viewed in the axial direction during rotation of the bearing, when the center of a ball passes through the center line of one oil hole, the ball closest to the remaining oil hole is located at a position which intersects with the center line of the other oil hole, and when an angle formed by a straight line passing through the center of the ball closest to the oil hole and perpendicular to the radial direction of the angular ball bearing, and a tangent at a contact point between the center line of the oil hole and the ball is set as (?) when the angular rolling bearing is viewed from the axial direction.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: January 22, 2019
    Assignee: NSK LTD.
    Inventors: Kyohei Matsunaga, Yoshiaki Katsuno
  • Publication number: 20180023621
    Abstract: In an angular ball bearing, an outer ring is provided with a plurality of oil holes. The circumferential phases of the plurality of oil holes are ??45°, when the angular rolling bearing is viewed in the axial direction during rotation of the bearing, when the center of a ball passes through the center line of one oil hole, the ball closest to the remaining oil hole is located at a position which intersects with the center line of the other oil hole, and when an angle formed by a straight line passing through the center of the ball closest to the oil hole and perpendicular to the radial direction of the angular ball bearing, and a tangent at a contact point between the center line of the oil hole and the ball is set as (?) when the angular rolling bearing is viewed from the axial direction.
    Type: Application
    Filed: January 14, 2016
    Publication date: January 25, 2018
    Applicant: NSK Ltd..
    Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
  • Patent number: 9523391
    Abstract: To provide a rolling bearing in which a favorable antirust performance can be obtained while reducing an amount of antirust oil than before, after removing chloride ions and sulfate ions from the entire surface of the bearing, antirust oil is provided to adhere thereto at an average film thickness of 4.5 ?m to 10 ?m, and the entire bearing is covered with a volatile corrosion inhibitor film such that a space between the volatile corrosion inhibitor film and the bearing is kept in a pressure-reduced condition.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: December 20, 2016
    Assignee: NSK LTD.
    Inventor: Kyohei Matsunaga
  • Publication number: 20160230812
    Abstract: To provide a rolling bearing in which a favorable antirust performance can be obtained while reducing an amount of antirust oil than before, after removing chloride ions and sulfate ions from the entire surface of the bearing, antirust oil is provided to adhere thereto at an average film thickness of 4.5 ?m to 10 ?m, and the entire bearing is covered with a volatile corrosion inhibitor film such that a space between the volatile corrosion inhibitor film and the bearing is kept in a pressure-reduced condition.
    Type: Application
    Filed: April 21, 2016
    Publication date: August 11, 2016
    Applicant: NSK LTD.
    Inventor: Kyohei MATSUNAGA
  • Patent number: 9377057
    Abstract: To provide a rolling bearing in which a favorable antirust performance can be obtained while reducing an amount of antirust oil than before, after removing chloride ions and sulfate ions from the entire surface of the bearing, antirust oil is provided to adhere thereto at an average film thickness of 4.5 ?m to 10 ?m, and the entire bearing is covered with a volatile corrosion inhibitor film such that a space between the volatile corrosion inhibitor film and the bearing is kept in a pressure-reduced condition.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: June 28, 2016
    Assignee: NSK LTD.
    Inventor: Kyohei Matsunaga
  • Publication number: 20150354633
    Abstract: To provide a rolling bearing in which a favorable antirust performance can be obtained while reducing an amount of antirust oil than before, after removing chloride ions and sulfate ions from the entire surface of the bearing, antirust oil is provided to adhere thereto at an average film thickness of 4.5 ?m to 10 ?m, and the entire bearing is covered with a volatile corrosion inhibitor film such that a space between the volatile corrosion inhibitor film and the bearing is kept in a pressure-reduced condition.
    Type: Application
    Filed: October 3, 2013
    Publication date: December 10, 2015
    Applicant: NSK LTD.
    Inventor: Kyohei MATSUNAGA
  • Patent number: RE48321
    Abstract: To provide a rolling bearing in which a favorable antirust performance can be obtained while reducing an amount of antirust oil than before, after removing chloride ions and sulfate ions from the entire surface of the bearing, antirust oil is provided to adhere thereto at an average film thickness of 4.5 ?m to 10 ?m, and the entire bearing is covered with a volatile corrosion inhibitor film such that a space between the volatile corrosion inhibitor film and the bearing is kept in a pressure-reduced condition.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: November 24, 2020
    Assignee: NSK LTD.
    Inventor: Kyohei Matsunaga
  • Patent number: RE48337
    Abstract: To provide a rolling bearing in which a favorable antirust performance can be obtained while reducing an amount of antirust oil than before, after removing chloride ions and sulfate ions from the entire surface of the bearing, antirust oil is provided to adhere thereto at an average film thickness of 4.5 ?m to 10 ?m, and the entire bearing is covered with a volatile corrosion inhibitor film such that a space between the volatile corrosion inhibitor film and the bearing is kept in a pressure-reduced condition.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: December 1, 2020
    Assignee: NSK LTD.
    Inventor: Kyohei Matsunaga