Patents by Inventor Yukinobu Nishiyama
Yukinobu Nishiyama 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: 10364849Abstract: In a constant-velocity joint, a center locus of a ball rolling on a first outer large-diameter portion has an arc shape having an arc center, and a center locus of the ball rolling on a second outer large-diameter portion has an arc shape having an arc center. Center loci of the ball rolling on an outer extension portion are positioned, throughout their lengths, in a region inducing a tangent line to an opening-side end portion of the center locus of the ball rolling on the second outer large-diameter portion, the region being positioned outward of the tangent line in a radial direction of the outer joint member. An opening-side end portion of the center locus of the ball rolling on the outer extension portion is positioned outward of the tangent line in the radial direction of the outer joint member.Type: GrantFiled: May 3, 2017Date of Patent: July 30, 2019Assignee: JTEKT CORPORATIONInventors: Yukinobu Nishiyama, Tetsuji Kawasumi, Satoshi Kato, Keishi Kobata, Masahito Ikeo, Hideki Sugiura
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Publication number: 20170321759Abstract: In a constant-velocity joint, a center locus of a ball rolling on a first outer large-diameter portion has an arc shape having an arc center, and a center locus of the ball rolling on a second outer large-diameter portion has an arc shape having an arc center. Center loci of the ball rolling on an outer extension portion are positioned; throughout their lengths, in a region inducing a tangent line to an opening-side end portion of the center locus of the ball rolling on the second outer large-diameter portion, the region being positioned outward of the tangent line in a radial direction of the outer joint member. An opening-side end portion of the center locus of the ball rolling on the outer extension portion is positioned outward of the tangent line in the radial direction of the outer joint member.Type: ApplicationFiled: May 3, 2017Publication date: November 9, 2017Applicant: JTEKT CORPORATIONInventors: Yukinobu NISHIYAMA, Tetsuji Kawasumi, Satoshi Kato, Keishi Kobata, Masahito Ikeo, Hideki Sugiura
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Patent number: 8814028Abstract: A propeller shaft includes a first shaft having a yoke at one end, a second shaft slidably connected to the other end of the first shaft, and a surface treated member which is arranged at a connecting portion, at which the first shaft and the second shaft are connected to each other, and to which surface treatment for improving slidability of the second shaft with respect to the first shaft is applied. The surface treated member is formed by a substrate which is separate from the first shaft and the second shaft and to which the surface treatment has been applied. The surface treated member is arranged at the connecting portion, at which the first shaft and the second shaft are connected to each other, after the surface treatment is applied.Type: GrantFiled: July 17, 2012Date of Patent: August 26, 2014Assignee: JTEKT CorporationInventors: Tomoki Ogawa, Satoshi Araki, Yukinobu Nishiyama, Yoshinori Satou, Kazunori Aoki
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Patent number: 8409019Abstract: A propeller shaft includes a first shaft having a yoke at one end, a second shaft slidably connected to the other end of the first shaft, and a surface treated member which is arranged at a connecting portion, at which the first shaft and the second shaft are connected to each other, and to which surface treatment for improving slidability of the second shaft with respect to the first shaft is applied. The surface treated member is formed by a substrate which is separate from the first shaft and the second shaft and to which the surface treatment has been applied. The surface treated member is arranged at the connecting portion, at which the first shaft and the second shaft are connected to each other, after the surface treatment is applied.Type: GrantFiled: December 3, 2010Date of Patent: April 2, 2013Assignee: JTEKT CorporationInventors: Tomoki Ogawa, Satoshi Araki, Yukinobu Nishiyama, Yoshinori Satou, Kazunori Aoki
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Publication number: 20120283031Abstract: A propeller shaft includes a first shaft having a yoke at one end, a second shaft slidably connected to the other end of the first shaft, and a surface treated member which is arranged at a connecting portion, at which the first shaft and the second shaft are connected to each other, and to which surface treatment for improving slidability of the second shaft with respect to the first shaft is applied. The surface treated member is formed by a substrate which is separate from the first shaft and the second shaft and to which the surface treatment has been applied. The surface treated member is arranged at the connecting portion, at which the first shaft and the second shaft are connected to each other, after the surface treatment is applied.Type: ApplicationFiled: July 17, 2012Publication date: November 8, 2012Applicant: JTEKT CORPORATIONInventors: Tomoki OGAWA, Satoshi ARAKI, Yukinobu NISHIYAMA, Yoshinori SATOU, Kazunori AOKI
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Publication number: 20110143845Abstract: A propeller shaft includes a first shaft having a yoke at one end, a second shaft slidably connected to the other end of the first shaft, and a surface treated member which is arranged at a connecting portion, at which the first shaft and the second shaft are connected to each other, and to which surface treatment for improving slidability of the second shaft with respect to the first shaft is applied. The surface treated member is formed by a substrate which is separate from the first shaft and the second shaft and to which the surface treatment has been applied. The surface treated member is arranged at the connecting portion, at which the first shaft and the second shaft are connected to each other, after the surface treatment is applied.Type: ApplicationFiled: December 3, 2010Publication date: June 16, 2011Applicant: JTEKT CORPORATIONInventors: Tomoki OGAWA, Satoshi ARAKI, Yukinobu NISHIYAMA, Yoshinori SATOU, Kazunori AOKI
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Patent number: 7850557Abstract: A torque fluctuation damper pulley 10 is provided with a torque fluctuation damping elastic member 15 between a hub 11 attached to a rotational shaft and a pulley member 13. The torque fluctuation damping elastic member 15 includes a pair of rubber members 15A and 15B which sandwich a support portion 24 of the pulley member 13 under equal elastic forces from the front and rear in the axial direction of the pulley member 13 to joint the hub with the pulley member 13 elastically. Thus, the pulley member 13 always has equal forces being applied thereto from the front and rear in the axial direction, so that it becomes possible to make unnecessary any thrust bearing which would otherwise be required for positioning the pulley member 13 in the axial direction.Type: GrantFiled: May 16, 2006Date of Patent: December 14, 2010Assignee: JTEKT CorporationInventors: Masaoki Moriya, Yukinobu Nishiyama
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Publication number: 20060264282Abstract: A torque fluctuation damper pulley 10 is provided with a torque fluctuation damping elastic member 15 between a hub 11 attached to a rotational shaft and a pulley member 13. The torque fluctuation damping elastic member 15 includes a pair of rubber members 15A and 15B which sandwich a support portion 24 of the pulley member 13 under equal elastic forces from the front and rear in the axial direction of the pulley member 13 to joint the hub with the pulley member 13 elastically. Thus, the pulley member 13 always has equal forces being applied thereto from the front and rear in the axial direction, so that it becomes possible to make unnecessary any thrust bearing which would otherwise be required for positioning the pulley member 13 in the axial direction.Type: ApplicationFiled: May 16, 2006Publication date: November 23, 2006Applicant: JTEKT CorporationInventors: Masaoki Moriya, Yukinobu Nishiyama