Patents Assigned to Koyo Sealing Techno Co., Ltd.
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Publication number: 20230159806Abstract: A seal rubber composition contains a carboxyl group-containing acrylic rubber, silica, and two or more inorganic fibers, an amount of the silica per 100 parts by weight of the carboxyl group-containing acrylic rubber is 25 to 100 parts by weight, and a total amount of the inorganic fibers per 100 parts by weight of the carboxyl group-containing acrylic rubber is 35 to 100 parts by weight. A sealing member includes a sliding portion composed of a vulcanized product of the seal rubber composition.Type: ApplicationFiled: September 20, 2022Publication date: May 25, 2023Applicants: KOYO SEALING TECHNO CO., LTD., JTEKT CORPORATIONInventors: Katsuhiko KUSUNOKI, Fumiaki KASAHARA
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Publication number: 20190337332Abstract: A method for manufacturing a hub unit includes: preparing a hub unit intermediate including an inner shaft, an inner ring fixed to an axial end of the inner shaft, and an outer ring rotatably arranged with respect to the inner shaft and the inner ring; preparing a magnetic seal member including a seal member and an annular magnetic member having no magnetic pole; and arranging the magnetic seal member between the inner ring and the outer ring of the hub unit intermediate. The method further includes: forming splines extending along the axial direction by cutting the inner circumferential surface of the inner shaft of the hub unit intermediate in which the magnetic seal member has been arranged; and forming magnetic poles in a circumferential direction of the magnetic member of the hub unit intermediate in which the plurality of splines have been formed.Type: ApplicationFiled: September 15, 2017Publication date: November 7, 2019Applicants: JTEKT CORPORATION, KOYO SEALING TECHNO CO., LTD.Inventors: Atsushi OHASHI, Hiroshi SHIME, Hiroyuki ORISAKA
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Patent number: 10377932Abstract: A sealing rubber composition includes acrylic rubber, artificial graphite, and coupling agent.Type: GrantFiled: July 29, 2016Date of Patent: August 13, 2019Assignees: JTEKT CORPORATION, KOYO SEALING TECHNO CO., LTD.Inventors: Takeshi Kawabayashi, Fumiaki Kasahara, Katsuhiko Kusunoki
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Patent number: 10247308Abstract: A sealing device includes an annular seal portion formed of an elastic material. On an inner peripheral surface of the seal portion, a main lip is formed so as to be in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface is formed so as to gradually enlarge in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a plurality of annular projections are formed along an axial direction so as to be in slidable contact with the outer peripheral surface of the rotary shaft in a state where the main lip is in slidable contact with the outer peripheral surface of the rotary shaft.Type: GrantFiled: April 18, 2014Date of Patent: April 2, 2019Assignees: Koyo Sealing Techno Co., Ltd., Nabtesco CorporationInventors: Kazuha Ikebukuro, Koji Kubota, Shuji Kurita
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Patent number: 10240674Abstract: A sealing device which allows the man-hour for mounting the sealing device to be reduced is provided. A sealing device includes: a slinger fitted and fixed to an end portion of an inner shaft; a core metal fitted and fixed to an end portion of an outer ring; an inner seal lip fixed to the core metal and in slidable contact with the slinger; an outer seal lip fixed to the core metal radially outward of the inner seal lip and in slidable contact with a side surface of a flange portion; and a labyrinth lip fixed to the core metal radially outward of the outer seal lip and forming a labyrinth seal together with the side surface of the flange portion.Type: GrantFiled: November 6, 2015Date of Patent: March 26, 2019Assignees: Koyo Sealing Techno Co., Ltd., JTEKT CorporationInventors: Shintaro Sakai, Katsuyuki Sakaji, Yoshito Takada
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Patent number: 9702463Abstract: A sealing device includes an elastic annular seal portion. On an inner peripheral surface of the seal portion, a main lip is in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface gradually enlarges in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a first annular projection is in slidable contact with the outer peripheral surface of the rotary shaft, and a second annular projection that projects toward a radially inward side is disposed between the main lip and the first annular projection. In an initial use state of the sealing device, the second annular projection is not in slidable contact with the rotary shaft; when the main lip wears to a degree that required sealing performance cannot be maintained, the second annular projection starts slidable contact with the rotary shaft.Type: GrantFiled: February 16, 2015Date of Patent: July 11, 2017Assignees: Koyo Sealing Techno Co., Ltd., Nabtesco CorporationInventors: Kazuha Ikebukuro, Koji Kubota, Shuji Kurita
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Publication number: 20170051123Abstract: A sealing rubber composition includes acrylic rubber, artificial graphite, and coupling agent.Type: ApplicationFiled: July 29, 2016Publication date: February 23, 2017Applicants: JTEKT CORPORATION, KOYO SEALING TECHNO CO., LTD.Inventors: Takeshi KAWABAYASHI, Fumiaki KASAHARA, Katsuhiko KUSUNOKI
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Publication number: 20160348789Abstract: A sealing device includes an elastic annular seal portion. On an inner peripheral surface of the seal portion, a main lip is in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface gradually enlarges in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a first annular projection is in slidable contact with the outer peripheral surface of the rotary shaft, and a second annular projection that projects toward a radially inward side is disposed between the main lip and the first annular projection. In an initial use state of the sealing device, the second annular projection is not in slidable contact with the rotary shaft; when the main lip wears to a degree that required sealing performance cannot be maintained, the second annular projection starts slidable contact with the rotary shaft.Type: ApplicationFiled: February 16, 2015Publication date: December 1, 2016Applicants: Koyo Sealing Techno Co., Ltd., Nabtesco CorporationInventors: Kazuha Ikebukuro, Koji Kubota, Shuji Kurita
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Publication number: 20160153564Abstract: A sealing device includes an annular seal portion formed of an elastic material. On an inner peripheral surface of the seal portion, a main lip is formed so as to be in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface is formed so as to gradually enlarge in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a plurality of annular projections are formed along an axial direction so as to be in slidable contact with the outer peripheral surface of the rotary shaft in a state where the main lip is in slidable contact with the outer peripheral surface of the rotary shaft.Type: ApplicationFiled: April 18, 2014Publication date: June 2, 2016Applicants: Koyo Sealing Techno Co., Ltd., Nabtesco CorporationInventors: Kazuha Ikebukuro, Koji Kubota, Shuji Kurita
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Publication number: 20160131257Abstract: A sealing device which allows the man-hour for mounting the sealing device to be reduced is provided. A sealing device includes: a slinger fitted and fixed to an end portion of an inner shaft; a core metal fitted and fixed to an end portion of an outer ring; an inner seal lip fixed to the core metal and in slidable contact with the slinger; an outer seal lip fixed to the core metal radially outward of the inner seal lip and in slidable contact with a side surface of a flange portion; and a labyrinth lip fixed to the core metal radially outward of the outer seal lip and forming a labyrinth seal together with the side surface of the flange portion.Type: ApplicationFiled: November 6, 2015Publication date: May 12, 2016Applicants: KOYO SEALING TECHNO CO., LTD., JTEKT CORPORATIONInventors: Shintaro Sakai, Katsuyuki Sakaji, Yoshito Takada
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Patent number: 8678660Abstract: A sealing device includes a bottom of an axial concave portion in a surface of an elastic member forming a radial lip, facing away from a flange portion in an axial direction overlaps an end face of a radially-extending portion of a core metal member, facing a tubular portion, in a radial direction. A bottom of a radial concave portion of the elastic member forming the radial lip, facing the tubular portion of a slinger is spaced from the end face of the core metal member toward a flange portion in the axial direction.Type: GrantFiled: November 19, 2008Date of Patent: March 25, 2014Assignees: JTEKT Corporation, Koyo Sealing Techno Co., Ltd.Inventors: Masahiro Tabata, Syuji Fujita, Shunichi Fujiwara, Kasumi Yamamoto
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Patent number: 8557904Abstract: The invention provides a sealing device in which adhesion of an elastic member used for the sealing device is controlled, and a coefficient of friction against a member sliding against the sealing device is reduced. A sealing device includes a first member 1, a second member 2 moving relative to the first member, and an elastic member 3 fixed to the first member 1 and sliding against the second member 2, and is characterized in that: the elastic member 3 is made of a rubber composition containing a metal soap, an organic acid amide and an oil-containing particle.Type: GrantFiled: November 19, 2008Date of Patent: October 15, 2013Assignees: Jtekt Corporation, Koyo Sealing Techno Co., Ltd.Inventors: Masahiro Tabata, Michitoshi Mitsumaru, Daisuke Ozaki, Atsuhito Tada, Eiji Namira, Kasumi Yamamoto
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Patent number: 8202006Abstract: Prior to assembly of an elastic member (51) to a slinger (52), a radially inner surface (58) of a first portion (56) is formed in a concave shape, and a radially inner surface (59) of a second portion (57) is formed in a conical shape. The second axial lip (55) is adapted such that, after the elastic member (51) is assembled to the slinger (52) and when a second axial lip (55) is in a not-yet-worn state, the second axial lip (55) does not come into contact with a fixation section (65) of the slinger (52).Type: GrantFiled: October 23, 2007Date of Patent: June 19, 2012Assignee: Koyo Sealing Techno Co., LtdInventors: Masahiro Tabata, Kazutoshi Yamamoto, Kasumi Yamamoto, legal representative
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Publication number: 20100002971Abstract: An annular elastic portion is secured to an annular metal core portion. A through hole is provided which penetrates the metal core portion and the elastic portion in a radial direction. A porous member which has the properties of allowing free passage of air while inhibiting the passage of water and oil therethrough is secured to an outer peripheral surface of the metal core portion so as to completely block a radially outer opening of the through hole. An canopy member having a cover plate located on a radially outer side of the porous member is secured to the outer peripheral surface of the metal core portion.Type: ApplicationFiled: October 23, 2007Publication date: January 7, 2010Applicants: JTEKT CORPORATION, KOYO SEALING TECHNO CO., LTD.Inventors: Ryouhei Hosaka, Kazuya Fujimoto, Masahide Sunagawa, Toshiaki Fujikawa
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Publication number: 20090220182Abstract: An inner ring, an outer ring, a circular cone roller constituting a rolling elements arranged between the inner ring and the outer ring, a first seal member arranged at an opening portion between the inner ring and the outer ring, and a second seal member arranged on an outer side in an axial direction of the first seal member are provided, the second seal member includes a core fixed to the outer ring, an elastic ring-like member fixedly attached to the core and having at least one lip, and an outward attached slinger having a section in a channel-like shape fixed to the inner ring to cover the core and the elastic ring-like member and having a portion of a section in an L-like shape and a circular cylinder shape portion.Type: ApplicationFiled: February 24, 2009Publication date: September 3, 2009Applicants: JTEKT Corporation, Koyo Sealing Techno Co., LTD.Inventors: Keiichi Furukawa, Yutaka Koma, Shigeru Inoue, Masafumi Masuda, Yoshishige Kasai, Shunichi Fujiwara
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Patent number: 7323515Abstract: The invention relates to a sealing composition which comprises a crosslinkable fluoroelastomer, a crosslinking agent for this elastomer and a reinforcing polyimide resin powder; and seals such as O-rings, made by molding the composition into a prescribed shape and crosslinking the molded article. According to the invention, seals free from metals and sulfur can be made from a fluoroelastomer suitable for the production unit for semiconductor devices without a scatter of physical properties within one seal or among seals, and the obtained seals are lowered in the compression set determined ate the same hardness level to cause little permanent set by compression in use, thus having a prolonged service life.Type: GrantFiled: November 29, 2002Date of Patent: January 29, 2008Assignees: Jtekt Corporation, Koyo Sealing Techno Co., Ltd.Inventors: Kazunori Hayashida, Takehisa Kida, Kazutoshi Yamamoto, Tomotaka Nakagawa, Takahiro Yamagishi, Masanobu Kato
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Patent number: 7215110Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: GrantFiled: June 10, 2005Date of Patent: May 8, 2007Assignees: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20050242514Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: ApplicationFiled: June 10, 2005Publication date: November 3, 2005Applicants: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20050054753Abstract: The invention relates to a sealing composition which comprises a crosslinkable fluoroelastomer, a crosslinking agent for this elastomer and a reinforcing polyimide resin powder; and seals such as O-rings, made by molding the composition into a prescribed shape and crosslinking the molded article. According to the invention, seals free from metals and sulfur can be made from a fluoroelastomer suitable for the production unit for semiconductor devices without a scatter of physical properties within one seal or among seals, and the obtained seals are lowered in the compression set determined ate the same hardness level to cause little permanent set by compression in use, thus having a prolonged service life.Type: ApplicationFiled: November 29, 2002Publication date: March 10, 2005Applicant: 1) Koyo Seiko Co., Ltd. 2) Koyo Sealing Techno Co., LtdInventors: Kazunori Hayashida, Takehisa Kida, Kazutoshi Yamamoto, Tomotaka Nakagawa, Takahiro Yamagishi, Masanobu Kato
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Patent number: 6520683Abstract: A seal ring attached to a shoulder portion of a bearing ring of a rolling bearing, and including an annular body, a pulsar ring bonded to a required position of the annular body by vulcanization forming, a first lip made of magnetized rubber and formed integrally with one surface of the pulsar ring and a second lip bonded to the other surface of the pulsar ring by vulcanization molding.Type: GrantFiled: June 5, 2001Date of Patent: February 18, 2003Assignees: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Tomomitsu Tamura