Patents by Inventor Isao Shintou
Isao Shintou 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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Publication number: 20230160431Abstract: A first piece (13) includes a first ring portion (13b) and a second ring portion (13c) which are arranged side by side in an axial direction and an inner diameter and an outer diameter of the first ring portion (13b) are respectively larger than an inner diameter and an outer diameter of the second ring portion (13c). A second piece (16) is obtained by pressing the first piece (13) while the first piece (13) is disposed between a first set and a second set.Type: ApplicationFiled: July 6, 2021Publication date: May 25, 2023Applicant: NSK Ltd.Inventors: Kouhei MORI, Mizuki WATANABE, Isao SHINTOU, Hiroshi KOYAMA
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Patent number: 11162538Abstract: A method of manufacturing a rotating bearing unit includes to cause one end surface in the axial direction of the forming punch (46), formed by combining a plurality of punch elements (46, 46) divided in the circumferential direction, which are displaceable in the axial direction and which are not displaceable in the circumferential direction, and having a processing teeth (44, 44) at one end surface in the axial direction, to face the other end surface of the caulking section (20) in the axial direction. In this state, rolls (30a) are rotated about the central axis (?) of the hub main body (8) while pressing the other end surface of the forming punch (46) in the axial direction with a pressing surface (43) of the roll (30a) having a central axis (?) that is inclined with respect to the central axis (?) of the hub main body (8).Type: GrantFiled: December 2, 2019Date of Patent: November 2, 2021Assignee: NSK LTD.Inventors: Nobuyuki Hagiwara, Kazuto Kobayashi, Isao Shintou, Hiroshi Koyama, Toshio Nakamura
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Publication number: 20200102987Abstract: A method of manufacturing a rotating bearing unit includes to cause one end surface in the axial direction of the forming punch (46), formed by combining a plurality of punch elements (46, 46) divided in the circumferential direction, which are displaceable in the axial direction and which are not displaceable in the circumferential direction, and having a processing teeth (44, 44) at one end surface in the axial direction, to face the other end surface of the caulking section (20) in the axial direction. In this state, rolls (30a) are rotated about the central axis (?) of the hub main body (8) while pressing the other end surface of the forming punch (46) in the axial direction with a pressing surface (43) of the roll (30a) having a central axis (?) that is inclined with respect to the central axis (?) of the hub main body (8).Type: ApplicationFiled: December 2, 2019Publication date: April 2, 2020Applicant: NSK LTD.Inventors: Nobuyuki Hagiwara, Kazuto Kobayashi, Isao Shintou, Hiroshi koyama, Toshio Nakamura
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Patent number: 10557505Abstract: A method of manufacturing a rotating bearing unit includes to cause one end surface in the axial direction of the forming punch (46), formed by combining a plurality of punch elements (46, 46) divided in the circumferential direction, which are displaceable in the axial direction and which are not displaceable in the circumferential direction, and having a processing teeth (44, 44) at one end surface in the axial direction, to face the other end surface of the caulking section (20) in the axial direction. In this state, rolls (30a) are rotated about the central axis (?) of the hub main body (8) while pressing the other end surface of the forming punch (46) in the axial direction with a pressing surface (43) of the roll (30a) having a central axis (?) that is inclined with respect to the central axis (?) of the hub main body (8).Type: GrantFiled: July 12, 2016Date of Patent: February 11, 2020Assignee: NSK LTD.Inventors: Nobuyuki Hagiwara, Kazuto Kobayashi, Isao Shintou, Hiroshi Koyama, Toshio Nakamura
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Patent number: 10391542Abstract: A method for manufacturing a rolling bearing unit is provided to periodically reciprocate a stage (38) in a vertical direction by rotating and driving a servo motor (44) while rotating a roll about a central axis of a hub main body using a roll driving motor (43) in a state in which a processing surface of the roll is pressed against other end surface of a caulking section in an axial direction. A period of the reciprocation is restricted by a relation between a rotation position of the roll about the central axis of the hub main body and an engaged state between concave sections, which are sections between a plurality of processed teeth formed in the processing surface of the roll, and a face spline tooth formed by the concave section.Type: GrantFiled: July 4, 2016Date of Patent: August 27, 2019Assignee: NSK LTD.Inventors: Nobuyuki Hagiwara, Kazuto Kobayashi, Isao Shintou, Hiroshi Koyama, Toshio Nakamura
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Patent number: 10343209Abstract: A rotary press device (33) includes a restriction section (36) configured to restrict a motion of a roll (30) around a central axis of a roll (30) against movement of the roll (30) around a central axis of a hub main body (8) during rotary forging. In an example, the restriction section (36) has guide teeth (44) meshed with teeth formed on a processing surface of the roll (30).Type: GrantFiled: February 29, 2016Date of Patent: July 9, 2019Assignee: NSK LTD.Inventors: Nobuyuki Hagiwara, Toshio Nakamura, Hiroshi Koyama, Isao Shintou, Kazuto Kobayashi
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Publication number: 20190201967Abstract: A rotary press device (33) includes a restriction section (36) configured to restrict a motion of a roll (30) around a central axis of a roll (30) against movement of the roll (30) around a central axis of a hub main body (8) during rotary forging. In an example, the restriction section (36) has guide teeth (44) meshed with teeth formed on a processing surface of the roll (30).Type: ApplicationFiled: March 7, 2019Publication date: July 4, 2019Applicant: NSK LTD.Inventors: Nobuyuki Hagiwara, Toshio Nakamura, Hiroshi Koyama, Isao Shintou, Kazuto Kobayashi
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Publication number: 20180202495Abstract: A method of manufacturing a rotating bearing unit includes to cause one end surface in the axial direction of the forming punch (46), formed by combining a plurality of punch elements (46, 46) divided in the circumferential direction, which are displaceable in the axial direction and which are not displaceable in the circumferential direction, and having a processing teeth (44, 44) at one end surface in the axial direction, to face the other end surface of the caulking section (20) in the axial direction. In this state, rolls (30a) are rotated about the central axis (a) of the hub main body (8) while pressing the other end surface of the forming punch (46) in the axial direction with a pressing surface (43) of the roll (30a) having a central axis (?) that is inclined with respect to the central axis (?) of the hub main body (8).Type: ApplicationFiled: July 12, 2016Publication date: July 19, 2018Applicant: NSK Ltd.Inventors: Nobuyuki HAGIWARA, Kazuto KOBAYASHI, Isao SHINTOU, Hiroshi KOYAMA, Toshio NAKAMURA
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Publication number: 20180169735Abstract: A method for manufacturing a rolling bearing unit is provided to periodically reciprocate a stage (38) in a vertical direction by rotating and driving a servo motor (44) while rotating a roll about a central axis of a hub main body using a roll driving motor (43) in a state in which a processing surface of the roll is pressed against other end surface of a caulking section in an axial direction. A period of the reciprocation is restricted by a relation between a rotation position of the roll about the central axis of the hub main body and an engaged state between concave sections, which are sections between a plurality of processed teeth formed in the processing surface of the roll, and a face spline tooth formed by the concave section.Type: ApplicationFiled: July 4, 2016Publication date: June 21, 2018Applicant: NSK Ltd.Inventors: Nobuyuki HAGIWARA, Kazuto KOBAYASHI, Isao SHINTOU, Hiroshi KOYAMA, Toshio NAKAMURA
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Patent number: 9956607Abstract: Construction is achieved that is capable of preventing the formation of radial streaks in the tip-end surfaces of teeth of hub-side face splines 21. When a swing center distance is taken to be L, a swing angle that is the inclination angle of the center axis of a roll 30 with respect to a main hub body 8 is taken to be ?, the pitch diameter of the hub-side face splines 21 is taken to be Dh, the number of teeth of the hub-side face splines 21 is taken to be Nh, and the number of teeth of a processing surface 31 of the roll 30 is taken to be Nr, the position relationship of the main hub body 8 and the roll 30, or in other words, at least one of the swing center distance L, the swing angle ?, and the pitch circle diameter Dh is regulated so that the relationship Nh/Nr=cos ?+(2L/Dh)·sin ? is satisfied.Type: GrantFiled: July 24, 2015Date of Patent: May 1, 2018Assignee: NSK LTD.Inventors: Nobuyuki Hagiwara, Toshio Nakamura, Hiroshi Koyama, Isao Shintou, Kazuto Kobayashi
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Publication number: 20180043417Abstract: A rotary press device (33) includes a restriction section (36) configured to restrict a motion of a roll (30) around a central axis of a roll (30) against movement of the roll (30) around a central axis of a hub main body (8) during rotary forging. In an example, the restriction section (36) has guide teeth (44) meshed with teeth formed on a processing surface of the roll (30).Type: ApplicationFiled: February 29, 2016Publication date: February 15, 2018Applicant: NSK LTD.Inventors: Nobuyuki HAGIWARA, Toshio NAKAMURA, Hiroshi KOYAMA, Isao SHINTOU, Kazuto KOBAYASHI
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Publication number: 20170209914Abstract: Construction is achieved that is capable of preventing the formation of radial streaks in the tip-end surfaces of teeth of hub-side face splines 21. When a swing center distance is taken to be L, a swing angle that is the inclination angle of the center axis of a roll 30 with respect to a main hub body 8 is taken to be ?, the pitch diameter of the hub-side face splines 21 is taken to be Dh, the number of teeth of the hub-side face splines 21 is taken to be Nh, and the number of teeth of a processing surface 31 of the roll 30 is taken to be Nr, the position relationship of the main hub body 8 and the roll 30, or in other words, at least one of the swing center distance L, the swing angle ?, and the pitch circle diameter Dh is regulated so that the relationship Nh/Nr=cos ?+(2L/Dh)·sin ? is satisfied.Type: ApplicationFiled: July 24, 2015Publication date: July 27, 2017Applicant: NSK LTD.Inventors: Nobuyuki HAGIWARA, Toshio NAKAMURA, Hiroshi KOYAMA, Isao SHINTOU, Kazuto KOBAYASHI
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Patent number: 8966767Abstract: A method of manufacturing a drawn cup needle roller bearing having a seal ring, including forming the seal ring by a press working by: punching a metal plate to form an annular first intermediate material; subjecting the first intermediate material to burring working such that a portion close to an inner diameter of the first intermediate material is bent in an axial direction at a right angle to form an annular second intermediate material having an L-shaped cross section, the second intermediate material comprising a cylindrical portion and an outward flange portion which is bent radially outward from an axial end portion of the cylindrical portion; removing the outward flange portion to form a cylindrical third intermediate; and subjecting the third intermediate material to cold rolling working to regulate an inner diameter, an outer diameter and a cross sectional shape of the third intermediate material.Type: GrantFiled: April 10, 2012Date of Patent: March 3, 2015Assignee: NSK Ltd.Inventors: Tomohiro Kudou, Kazuto Kobayashi, Keiichi Horino, Kiyoshi Ootsuka, Isao Shintou
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Publication number: 20120192426Abstract: A method of manufacturing a drawn cup needle roller bearing having a seal ring, including forming the seal ring by a press working by: punching a metal plate to form an annular first intermediate material; subjecting the first intermediate material to burring working such that a portion close to an inner diameter of the first intermediate material is bent in an axial direction at a right angle to form an annular second intermediate material having an L-shaped cross section, the second intermediate material comprising a cylindrical portion and an outward flange portion which is bent radially outward from an axial end portion of the cylindrical portion; removing the outward flange portion to form a cylindrical third intermediate; and subjecting the third intermediate material to cold rolling working to regulate an inner diameter, an outer diameter and a cross sectional shape of the third intermediate material.Type: ApplicationFiled: April 10, 2012Publication date: August 2, 2012Applicant: NSK LTD.Inventors: Tomohiro Kudou, Kazuto Kobayashi, Keiichi Horino, Kiyoshi Ootsuka, Isao Shintou
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Patent number: 8177435Abstract: A drawn cup needle roller bearing 30 having a seal ring comprises: a shell 31 having a raceway surface 31a on an inner circumferential face and also having inward flange portions 31b, 31c in both end portions; a cage 32 having a plurality of pockets 32a in a circumferential direction and worked by cutting; a plurality of needles 33 retained in the pockets 32a so that the needles freely rotate along the raceway surface 31a; and a seal ring 34, the shape of which is cylindrical, arranged inside the shell 31 between an end face 32b of the cage 32 and the inward flange portion 31b. The seal ring 34 composes a floating seal and is formed by press working. Due to the foregoing, an excellent dimensional accuracy can be provided and a quantity of lubricant passing through the bearing can be controlled.Type: GrantFiled: June 7, 2007Date of Patent: May 15, 2012Assignee: NSK Ltd.Inventors: Tomohiro Kudou, Kazuto Kobayashi, Keiichi Horino, Kiyoshi Ootsuka, Isao Shintou
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Publication number: 20100054651Abstract: A drawn cup needle roller bearing 30 having a seal ring comprises: a shell 31 having a raceway surface 31a on an inner circumferential face and also having inward flange portions 31b, 31c in both end portions; a cage 32 having a plurality of pockets 32a in a circumferential direction and worked by cutting; a plurality of needles 33 retained in the pockets 32a so that the needles freely rotate along the raceway surface 31a; and a seal ring 34, the shape of which is cylindrical, arranged inside the shell 31 between an end face 32b of the cage 32 and the inward flange portion 31b. The seal ring 34 composes a floating seal and is formed by press working. Due to the foregoing, an excellent dimensional accuracy can be provided and a quantity of lubricant passing through the bearing can be controlled.Type: ApplicationFiled: June 7, 2007Publication date: March 4, 2010Applicant: NSK LTD.Inventors: Tomohiro Kudou, Kazuto Kobayashi, Keiichi Horino, Kiyoshi Ootsuka, Isao Shintou
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Publication number: 20080219611Abstract: A cage element 18 in which pillar element portions 17, 17 are made to project from a rim portion 11 is manufactured by performing a punching process and a bending process on a metal plate. With rim portions 11, 11 of a pair of cage elements 18, 18 disposed concentrically with each other and phases in a circumferential direction of the respective pillar element portions 17, 17 made to coincide with each other, distal ends of the respective pillar element portions 17, 17 are butted to each other to be welded together, whereby respective pillar portions are made. The roundness of the respective rim portions 11, 11 and the shape accuracy and interval accuracy of these respective pillar portions are improved without performing troublesome processes, so as to solve the problem.Type: ApplicationFiled: December 21, 2005Publication date: September 11, 2008Applicant: NSK LTD.Inventors: Kiyoshi Ootsuka, Kazuto Kobayashi, Isao Shintou, Keiichi Horino, Yuuki Mizushima
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Publication number: 20080089631Abstract: A manufacturing method of a raceway ring for a radial ball bearing, the radial ball bearing has the raceway ring has at least one of an outer ring formed with an outer ring raceway, of which sectional shape is arcuate, and which is formed entire of circumference on an axially intermediate portion of an inner circumferential face as a raceway surface; and an inner ring formed with an inner ring raceway, of which sectional shape is arcuate, and which is formed entire of circumference on an axially intermediate portion of an outer circumferential face as the raceway surface and plurality of balls rollably provided between the inner ring raceway and the outer ring raceway.Type: ApplicationFiled: September 20, 2005Publication date: April 17, 2008Applicant: NSK LtdInventors: Kazuto Kobayashi, Kiyoshi Ootsuka, Isao Shintou, Kouhei Mori, Yu Yasuda
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Publication number: 20070119054Abstract: A race member in a hub unit for supporting a wheel. The race member includes a cylinder portion, a flange portion bend radially outward from the cylinder portion, and a continuous portion that integrally connects the cylinder portion with the flange portion. The race member is integrally formed by subjecting a metal plate to punching and cold plastic working. The continuous portion is larger in thickness than the metal plate.Type: ApplicationFiled: December 29, 2006Publication date: May 31, 2007Inventors: Kazuto Kobayashi, Isao Shintou, Kiyoshi Ootsuka, Kouhei Mori
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Publication number: 20050185870Abstract: A race member in a hub unit for supporting a wheel. The race member includes a cylinder portion, a flange portion bend radially outward from the cylinder portion, and a continuous portion that integrally connects the cylinder portion with the flange portion. The race member is integrally formed by subjecting a metal plate to punching and cold plastic working. The continuous portion is larger in thickness than the metal plate.Type: ApplicationFiled: January 19, 2005Publication date: August 25, 2005Inventors: Kazuto Kobayashi, Isao Shintou, Kiyoshi Ootsuka, Kouhei Mori