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).
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Patent number: 11092193Abstract: 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: GrantFiled: August 10, 2017Date of Patent: August 17, 2021Assignee: NSK LTD.Inventors: Kyohei Matsunaga, Yoshiaki Katsuno
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Publication number: 20210148400Abstract: 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: ApplicationFiled: August 10, 2017Publication date: May 20, 2021Applicant: NSK LTD.Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
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Patent number: 10746227Abstract: 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: GrantFiled: March 19, 2020Date of Patent: August 18, 2020Assignee: NSK LTD.Inventors: Ryosuke Amano, Yoshiaki Katsuno, Kyohei Matsunaga
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Publication number: 20200217366Abstract: 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: ApplicationFiled: March 19, 2020Publication date: July 9, 2020Applicant: NSK LTD.Inventors: Ryosuke AMANO, Yoshiaki KATSUNO, Kyohei MATSUNAGA
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Patent number: 10690180Abstract: 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: GrantFiled: August 2, 2017Date of Patent: June 23, 2020Assignee: NSK LTD.Inventors: Ryosuke Amano, Yoshiaki Katsuno, Kyohei Matsunaga
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Patent number: 10670078Abstract: 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: GrantFiled: August 2, 2017Date of Patent: June 2, 2020Assignee: NSK LTD.Inventors: Ryosuke Amano, Yoshiaki Katsuno, Kyohei Matsunaga
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Patent number: 10634186Abstract: 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: GrantFiled: August 10, 2017Date of Patent: April 28, 2020Assignee: NSK LTD.Inventors: Kyohei Matsunaga, Yoshiaki Katsuno
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Publication number: 20190211874Abstract: 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: ApplicationFiled: August 10, 2017Publication date: July 11, 2019Applicant: NSK LTD.Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
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Publication number: 20190195276Abstract: 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: ApplicationFiled: August 2, 2017Publication date: June 27, 2019Applicant: NSK LTD.Inventors: Ryosuke AMANO, Yoshiaki KATSUNO, Kyohei MATSUNAGA
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Publication number: 20190186546Abstract: 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: ApplicationFiled: August 2, 2017Publication date: June 20, 2019Applicant: NSK LTD.Inventors: Ryosuke AMANO, Yoshiaki KATSUNO, Kyohei MATSUNAGA
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Publication number: 20190178291Abstract: 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: ApplicationFiled: July 26, 2017Publication date: June 13, 2019Applicant: NSK LTD.Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
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Publication number: 20190170187Abstract: 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: ApplicationFiled: August 10, 2017Publication date: June 6, 2019Applicant: NSK LTD.Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
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Patent number: 10184515Abstract: 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: GrantFiled: January 14, 2016Date of Patent: January 22, 2019Assignee: NSK LTD.Inventors: Kyohei Matsunaga, Yoshiaki Katsuno
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Publication number: 20180023621Abstract: 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: ApplicationFiled: January 14, 2016Publication date: January 25, 2018Applicant: NSK Ltd..Inventors: Kyohei MATSUNAGA, Yoshiaki KATSUNO
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Patent number: 9523391Abstract: 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: GrantFiled: April 21, 2016Date of Patent: December 20, 2016Assignee: NSK LTD.Inventor: Kyohei Matsunaga
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Publication number: 20160230812Abstract: 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: ApplicationFiled: April 21, 2016Publication date: August 11, 2016Applicant: NSK LTD.Inventor: Kyohei MATSUNAGA
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Patent number: 9377057Abstract: 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: GrantFiled: October 3, 2013Date of Patent: June 28, 2016Assignee: NSK LTD.Inventor: Kyohei Matsunaga
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Publication number: 20150354633Abstract: 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: ApplicationFiled: October 3, 2013Publication date: December 10, 2015Applicant: NSK LTD.Inventor: Kyohei MATSUNAGA
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Patent number: RE48321Abstract: 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: GrantFiled: June 17, 2019Date of Patent: November 24, 2020Assignee: NSK LTD.Inventor: Kyohei Matsunaga
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Patent number: RE48337Abstract: 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: GrantFiled: June 17, 2019Date of Patent: December 1, 2020Assignee: NSK LTD.Inventor: Kyohei Matsunaga