Patents by Inventor Yugo Yoshimura
Yugo Yoshimura 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: 10190637Abstract: A sealed bearing assembly includes seal members each including a seal lip with multiple protrusions, and being arranged such that oil passages are defined between the seal lip and a seal sliding surface which is configured to slide circumferentially relative to the protrusions such that the oil passages communicate with a bearing internal space and an exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that, when the bearing rotates, lubricating oil in the oil passages is pulled into spaces between the seal lip and the seal sliding surface such that a fluid lubricating condition is created between the seal lip and the seal sliding surface, due to a wedge effect.Type: GrantFiled: March 8, 2016Date of Patent: January 29, 2019Assignee: NTN CORPORATIONInventors: Kazunori Inamasu, Yugo Yoshimura, Takahiro Wakuda, Katsuaki Sasaki
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Patent number: 10132346Abstract: A positioning protrusion 14 is provided in a center of an outer diameter surface of a halved outer ring 11a in both circumferential and axial directions. The positioning protrusion 14 is configured to engage with a housing, which is placed on an outer diameter side of the halved outer ring, to position the halved outer ring 11a with respect to the housing. A protruding portion 17a and a recessed portion 17b are provided in each abutting portions 16a, 16b where a pair of the halved outer rings 11a abut on each other when fitted on a rotary shaft that is supported by a roller bearing. The protruding portion 17a and the recessed portion 17b are configured to mesh with each other to restrict axial movement of both halved outer rings 11a. The protruding portion 17a and the recessed portion 17b are point-symmetric with respect to a center 20 of the positioning protrusion 14.Type: GrantFiled: February 18, 2010Date of Patent: November 20, 2018Assignee: NTN CORPORATIONInventors: Shinji Oishi, Yugo Yoshimura, Katsufumi Abe
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Publication number: 20180045247Abstract: A sealed bearing assembly includes seal members each including a seal lip formed with multiple protrusions, and arranged such that oil passages are formed between the seal lip and a seal sliding surface which slides circumferentially relative to the protrusions such that the oil passages communicate with the bearing internal space and the exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that when the bearing rotates, lubricating oil in the oil passages are pulled into the spaces between the seal lip and the seal sliding surface such that fluid lubricating condition is created between the seal lip and the seal sliding surface, due to the wedge effect.Type: ApplicationFiled: March 8, 2016Publication date: February 15, 2018Applicant: NTN CORPORATIONInventors: Kazunori INAMASU, Yugo YOSHIMURA, Takahiro WAKUDA, Katsuaki SASAKI
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Patent number: 8834035Abstract: A roller bearing retainer (13) includes a pair of annular ring parts (14) and a plurality of column parts (15) each including a column center part (16) provided in an axial center region so as to be positioned relatively on the radial inner side, a pair of column end parts (17) provided in axial end regions so as to be positioned relatively on the radial outer side, and a pair of column sloped parts (18) positioned between the column center part (16) and the pair of column end parts (17), and connecting the pair of ring parts to each other. A thickness of each part of the column center part, the pair of column end parts, and the pair of column sloped parts is smaller than a thickness of a boundary part between the adjacent parts.Type: GrantFiled: December 19, 2008Date of Patent: September 16, 2014Assignee: NTN CorporationInventors: Shinji Oishi, Yugo Yoshimura, Katsufumi Abe
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Patent number: 8418670Abstract: A needle roller bearing (21) as a roller bearing comprises an outer ring (22) having a plurality of outer ring members (22a) and (22b) split by a split line extending in the axial direction of the bearing, and a plurality of needle rollers (23) arranged along the track surface of the outer ring (22). The outer ring member (22a) is in the form of a semicircular shape having a center angle of 180° and has an engagement click (22c) bent from one circumferential side end to the radial outer side. The two outer ring members (22a) and (22b) are connected in the circumferential direction to form the annular outer ring (22).Type: GrantFiled: August 30, 2007Date of Patent: April 16, 2013Assignees: NTN Corporation, Honda Motor Co., Ltd.Inventors: Katsufumi Abe, Akihiko Katayama, Yugo Yoshimura, Shinji Oishi, Hiroki Tsuchiyama, Noriaki Fujii, Tomoya Fujimoto, Keiko Yoshida, Kiminori Komura, Kazuto Abe
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Patent number: 8132550Abstract: A needle roller bearing (21) as a roller bearing comprises an outer ring (22) formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, and a plurality of needle rollers (23) arranged along the inner diameter surface of the outer ring (22), and an oil groove (22i) extending in a circumferential direction so as to contain a position opposed to an opening (13e) of an oil path of a housing is formed in the outer diameter surface of the outer ring member.Type: GrantFiled: August 30, 2007Date of Patent: March 13, 2012Assignees: NTN Corporation, Honda Motor Co., Ltd.Inventors: Shinji Oishi, Akihiko Katayama, Yugo Yoshimura, Katsufumi Abe, Hiroki Tsuchiyama, Noriaki Fujii, Tomoya Fujimoto, Keiko Yoshida, Kiminori Komura, Kazuto Abe
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Patent number: 8128291Abstract: A needle roller bearing comprises an outer ring having a plurality of outer ring members split by a parting line extending in the axial direction of the bearing, a plurality of needle rollers rotatably arranged on the raceway surface of the outer ring, and a retainer retaining the plurality of needle rollers. A curvature radius r1 of the outer ring member and a curvature radius r2 of the outer diameter of the retainer has a relation such that 1<r1/r2<1.3.Type: GrantFiled: July 14, 2006Date of Patent: March 6, 2012Assignees: NTN Corporation, Honda Motor Co., Ltd.Inventors: Akihiko Katayama, Shinji Oishi, Yugo Yoshimura, Noriaki Fujii, Tomoya Fujimoto
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Publication number: 20120008893Abstract: A positioning protrusion 14 is provided in a center of an outer diameter surface of a halved outer ring 11a in both circumferential and axial directions. The positioning protrusion 14 is configured to engage with a housing, which is placed on an outer diameter side of the halved outer ring, to position the halved outer ring 11a with respect to the housing. A protruding portion 17a and a recessed portion 17b are provided in each abutting portions 16a, 16b where a pair of the halved outer rings 11a abut on each other when fitted on a rotary shaft that is supported by a roller bearing. The protruding portion 17a and the recessed portion 17b are configured to mesh with each other to restrict axial movement of both halved outer rings 11a. The protruding portion 17a and the recessed portion 17b are point-symmetric with respect to a center 20 of the positioning protrusion 14.Type: ApplicationFiled: February 18, 2010Publication date: January 12, 2012Applicant: NTN CORPORATIONInventors: Shinji Oishi, Yugo Yoshimura, Katsufumi Abe
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Patent number: 7896557Abstract: A needle roller bearing comprises an outer ring having a split part in a circumferential direction, a plurality of rollers which can roll along an inner diameter surface of the outer ring, and a cage holding the plurality of rollers. The outer ring has an engaging click protruding inward along a diameter at a width-direction end thereof to prevent the cage from moving in an axial direction.Type: GrantFiled: March 13, 2006Date of Patent: March 1, 2011Assignees: NTN Corporation, Honda Motor Co., Ltd.Inventors: Yoshiyasu Nakano, Shinji Oishi, Katsufumi Abe, Yugo Yoshimura, Noriaki Fujii, Keiko Yoshida
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Patent number: 7896556Abstract: A needle roller bearing comprises an outer ring having a plurality of outer ring members split by split lines extending in an axial direction of the bearing, a plurality of needle rollers arranged on an orbit surface of said outer ring so that they can roll thereon, and a cage holding the needle rollers at intervals. The outer ring member has a projection serving as a positioning engaging part which engages with a housing for positioning, and an engaging click protruding from an axial end of the outer ring member inward along a diameter to prevent the cage from moving in an axial direction, in positions shifted from its circumferential center.Type: GrantFiled: March 13, 2006Date of Patent: March 1, 2011Assignees: NTN Corporation, Honda Motor Co., Ltd.Inventors: Yoshiyasu Nakano, Shinji Oishi, Katsufumi Abe, Akihiko Katayama, Yugo Yoshimura, Noriaki Fujii, Keiko Yoshida
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Publication number: 20100278472Abstract: A roller bearing retainer 33 includes a plurality of column parts 15 each containing a column center part 16, a pair of column end parts 17, and a pair of column sloped parts 18 positioned between the column center part 16 and each of the pair of column end parts 17, and a pair of annular ring parts 14 connected to longitudinal one side and the other side ends of the plurality of column parts 15, and having a flange part 19 extending from a position connected to the column part 15 toward the radial inner side.Type: ApplicationFiled: December 2, 2008Publication date: November 4, 2010Inventors: Shinji Oishi, Katsufumi Abe, Yugo Yoshimura
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Publication number: 20100278471Abstract: A roller bearing retainer (13) includes a pair of annular ring parts (14) and a plurality of column parts (15) each including a column center part (16) provided in an axial center region so as to be positioned relatively on the radial inner side, a pair of column end parts (17) provided in axial end regions so as to be positioned relatively on the radial outer side, and a pair of column sloped parts (18) positioned between the column center part (16) and the pair of column end parts (17), and connecting the pair of ring parts to each other. A thickness of each part of the column center part, the pair of column end parts, and the pair of column sloped parts is smaller than a thickness of a boundary part between the adjacent parts.Type: ApplicationFiled: December 19, 2008Publication date: November 4, 2010Inventors: Shinji Oishi, Yugo Yoshimura, Katsufumi Abe
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Publication number: 20090235887Abstract: A needle roller bearing (21) as a roller bearing comprises an outer ring (22) formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, and a plurality of needle rollers (23) arranged along the inner diameter surface of the outer ring (22), and an oil groove (22i) extending in a circumferential direction so as to contain a position opposed to an opening (13e) of an oil path of a housing is formed in the outer diameter surface of the outer ring member.Type: ApplicationFiled: August 20, 2007Publication date: September 24, 2009Inventors: Shinji Oishi, Akihiko Katayama, Yugo Yoshimura, Katsufumi Abe, Hiroki Tsuchiyama, Noriaki Fuji, Tomoya Fujimoto, Keiko Yoshida, Kiminori Komura, Kazuto Abe
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Publication number: 20090136169Abstract: A needle roller bearing comprises an outer ring having a plurality of outer ring members split by a parting line extending in the axial direction of the bearing, a plurality of needle rollers rotatably arranged on the raceway surface of the outer ring, and a retainer retaining the plurality of needle rollers. A curvature radius r1 of the outer ring member and a curvature radius r2 of the outer diameter of the retainer has a relation such that 1<r1/r2<1.3.Type: ApplicationFiled: July 14, 2006Publication date: May 28, 2009Inventors: Akihiko Katayama, Shinji Oishi, Yugo Yoshimura, Noriaki Fujii, Tomoya Fujimoto
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Publication number: 20090123104Abstract: A needle roller bearing comprises an outer ring having a plurality of outer ring members split by a parting line extending in the axial direction of the bearing, and a plurality of needle rollers rotatably arranged on the raceway surface of the outer ring. Thus, a non-contact length “L” between the outer ring members and the needle roller at an abutment part of the adjacent outer ring members, and an effective length “w” of the needle roller has a relation such that L/w<0.5.Type: ApplicationFiled: July 14, 2006Publication date: May 14, 2009Inventors: Katsufumi Abe, Shinji Oishi, Yugo Yoshimura, Noriaki Fujii, Tomoya Fujimoto
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Publication number: 20080181549Abstract: A needle roller bearing comprises an outer ring having a split part in a circumferential direction, a plurality of rollers which can roll along an inner diameter surface of the outer ring, and a cage holding the plurality of rollers. The outer ring has an engaging click protruding inward along a diameter at a width-direction end thereof to prevent the cage from moving in an axial direction.Type: ApplicationFiled: March 13, 2006Publication date: July 31, 2008Inventors: Yoshiyasu Nakano, Shinji Oishi, Katsufumi Abe, Yugo Yoshimura, Noriaki Fujii, Keiko Yoshida
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Publication number: 20080131041Abstract: A needle roller bearing comprises an outer ring having a plurality of outer ring members split by split lines extending in an axial direction of the bearing, a plurality of needle rollers arranged on an orbit surface of said outer ring so that they can roll thereon, and a cage holding the needle rollers at intervals. The outer ring member has a projection serving as a positioning engaging part which engages with a housing for positioning, and an engaging click protruding from an axial end of the outer ring member inward along a diameter to prevent the cage from moving in an axial direction, in positions shifted from its circumferential center.Type: ApplicationFiled: March 13, 2006Publication date: June 5, 2008Inventors: Yoshiyasu Nakano, Shinji Oishi, Katsufumi Abe, Akihiko Katayama, Yugo Yoshimura, Noriaki Fujii, Keiko Yoshida