Patents by Inventor Yutaka Koma
Yutaka Koma 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: 20150316103Abstract: A rolling bearing includes an inner ring having an inner raceway face, an outer ring having an outer raceway face opposed to the inner raceway face, rolling elements rolling along the inner and outer raceway faces, in an interior of the bearing between the inner and outer rings, a first seal member interposed between an outer peripheral face of the inner ring and an inner peripheral face of the outer ring, and sealing the interior of the bearing, and a second seal member arranged in parallel with the first seal member, outside in an axial direction. The first and second seal members are disposed at a side closer to the interior of the bearing than an end face of the inner ring and an end face of the outer ring in the axial direction.Type: ApplicationFiled: November 19, 2013Publication date: November 5, 2015Inventors: Shigeru INOUE, Yutaka KOMA, Masao TAKIMOTO, Yuya ONO
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Patent number: 8770848Abstract: An axle bearing system includes a bearing portion which includes an inner ring, an outer ring and a plurality of rolling elements which are interposed between the inner ring and the outer ring and which is installed on a hub shaft with seal portions which are each formed by a slinger, a core metal and a non-conductive seal provided therebetween mounted in annular opening portions formed between the inner ring and the outer ring. A conductive body is attached to the seal portion so as to provide an electrical conducting state between the outer ring and the inner ring.Type: GrantFiled: July 7, 2009Date of Patent: July 8, 2014Assignee: JTEKT CorporationInventors: Yutaka Koma, Shigeaki Furusawa, Keiichi Furukawa, Shigeru Inoue
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Patent number: 8657502Abstract: An inner ring of a wheel bearing device has a ring mounting surface on which a pulsar ring for detecting a rotation speed of an axle is mounted and first and second inner raceway surfaces which are arranged along an axis of the axle and on which rolling elements roll. The inner ring includes a first inner ring member that has the first inner raceway surface and the ring mounting surface and a second inner ring member that has the second inner raceway surface and a portion that is spaced apart in an axial direction from the second inner raceway surface toward one side at a distance that is longer than or equal to a distance in the axial direction between the first inner raceway surface and the ring mounting surface. A diameter of the portion is smaller than a diameter of the ring mounting surface.Type: GrantFiled: December 10, 2010Date of Patent: February 25, 2014Assignee: JTEKT CorporationInventors: Shigeaki Furusawa, Yutaka Koma, Shinichi Okubo
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Patent number: 8167498Abstract: A body part of a rotation detecting sensor of a rotation number detector which is provided on a bearing apparatus for an axle has a large diameter part formed in its upper part and a small diameter part formed in its lower part, and at the same time, a sensor fitting hole part which is formed in an outer ring of a bearing part and into which the body part of the rotation detecting sensor is inserted is so formed that an radially outer part thereof has an inner diameter substantially equal to an outer diameter of the large diameter part of the body part, and a lower part thereof has an inner diameter slightly larger than an outer diameter of the small diameter part of the body part.Type: GrantFiled: February 21, 2008Date of Patent: May 1, 2012Assignee: JTEKT CorporationInventors: Yutaka Koma, Joji Miyawaki, Takumi Harada, Shigeru Inoue
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Patent number: 8167500Abstract: 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: GrantFiled: February 24, 2009Date of Patent: May 1, 2012Assignee: JTEKT CorporationInventors: Keiichi Furukawa, Yutaka Koma, Shigeru Inoue, Masafumi Masuda, Yoshishige Kasai, Shunichi Fujiwara
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Patent number: 8033735Abstract: An axle bearing assembly includes a flange, on which a wheel is mounted; a hub shaft constructed of a cylindrical portion provided on an inboard side of the flange; a bearing having an inner ring; an outer ring; and rolling elements disposed between the inner ring and the outer ring; a first sealing member fixed to an inboard side between the inner ring and the outer ring; and a removable second sealing member is fitted to the inboard side of the first sealing member. The inner ring of the bearing portion is fixed to the cylindrical portion of the hub shaft.Type: GrantFiled: July 31, 2008Date of Patent: October 11, 2011Assignee: JTEKT CorporationInventors: Keiichi Furukawa, Shigeaki Furusawa, Yutaka Koma, Shigeru Inoue
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Publication number: 20110158571Abstract: An inner ring of a wheel bearing device has a ring mounting surface on which a pulsar ring for detecting a rotation speed of an axle is mounted and first and second inner raceway surfaces which are arranged along an axis of the axle and on which rolling elements roll. The inner ring includes a first inner ring member that has the first inner raceway surface and the ring mounting surface and a second inner ring member that has the second inner raceway surface and a portion that is spaced apart in an axial direction from the second inner raceway surface toward one side at a distance that is longer than or equal to a distance in the axial direction between the first inner raceway surface and the ring mounting surface. A diameter of the portion is smaller than a diameter of the ring mounting surface.Type: ApplicationFiled: December 10, 2010Publication date: June 30, 2011Applicant: JTEKT CORPORATIONInventors: Shigeaki FURUSAWA, Yutaka KOMA, Shinichi OKUBO
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Publication number: 20110129176Abstract: An axle bearing system is provided in which even in the event that a sufficient space is not present between a bearing portion in which a fluorine seal is used in a seal portion and a hub shaft, it is possible to establish an electric conduction between an outer ring and an inner ring in an ensured fashion. There is provided an axle bearing system having a bearing portion which includes an inner ring 11, an outer ring 12 and a plurality of rolling elements 13 which are interposed between the inner ring 11 and the outer ring 12 and which is installed on a hub shaft 2 with seal portions 20a, 20b which are each formed by a slinger, a core metal and a non-conductive seal provided therebetween mounted in annular opening portions formed between the inner ring 11 and the outer ring 12, wherein a conductive body 24 is provided in the seal portion 20b so as to provide an electrical conducting state between the outer ring 12 and the inner ring 11.Type: ApplicationFiled: July 7, 2009Publication date: June 2, 2011Inventors: Yutaka Koma, Shigeaki Furusawa, Keiichi Furukawa, Shigeru Inoue
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Patent number: 7736215Abstract: A polishing tool comprising a support member, and polishing means fixed to the support member. The polishing means is composed of felt having a density of 0.20 g/cm3 or more and a hardness of 30 or more, and abrasive grains dispersed in the felt. A polishing method and apparatus involving pressing the polishing means against a surface of a workpiece to be polished, while rotating the workpiece and also rotating the polishing tool.Type: GrantFiled: November 29, 2007Date of Patent: June 15, 2010Assignee: Disco CorporationInventors: Sinnosuke Sekiya, Setsuo Yamamoto, Yutaka Koma, Masashi Aoki
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Publication number: 20100109424Abstract: An axle bearing apparatus includes a hub shaft including a wheel-mounting flange formed at its outer end portion, and a cylindrical portion formed on an inner side surface of the flange, a bearing portion press-fitted on the cylindrical portion of the hub shaft and including an inner ring, an outer ring and rolling elements disposed between the inner and outer rings, and a slinger having a through hole formed through its central portion. The through hole is fitted on the cylindrical portion such that an outer diameter of the slinger is generally equal to an outer diameter of the flange, and the slinger is press-clamped to the inner side surface of the flange by bolts press-fitted respectively in a plurality of bolt holes formed in the flange. An adhesive bonds the slinger to the flange.Type: ApplicationFiled: January 7, 2010Publication date: May 6, 2010Applicant: JTEKT CorporationInventors: Shigeru Inoue, Chikayoshi Murotani, Shigeaki Furusawa, Takumi Harada, Yutaka Koma
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Patent number: 7708353Abstract: An axle bearing apparatus includes a hub shaft including a wheel-mounting flange formed at its outer end portion, and a cylindrical portion formed on an inner side surface of the flange, a bearing portion press-fitted on the cylindrical portion of the hub shaft and including an inner ring, an outer ring and rolling elements disposed between the inner and outer rings, and a slinger having a through hole formed through its central portion. The through hole is fitted on the cylindrical portion such that an outer diameter of the slinger is generally equal to an outer diameter of the flange, and the slinger is press-clamped to the inner side surface of the flange by bolts press-fitted respectively in a plurality of bolt holes formed in the flange. O-rings are interposed between the flange and the slinger.Type: GrantFiled: August 13, 2007Date of Patent: May 4, 2010Assignee: JTEKT CorporationInventors: Shigeru Inoue, Chikayoshi Murotani, Shigeaki Furusawa, Takumi Harada, Yutaka Koma
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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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Publication number: 20090034894Abstract: An axle bearing assembly includes a flange, on which a wheel is mounted; a hub shaft constructed of a cylindrical portion provided on an inboard side of the flange; a bearing having an inner ring; an outer ring; and rolling elements disposed between the inner ring and the outer ring; a first sealing member fixed to an inboard side between the inner ring and the outer ring; and a removable second sealing member is fitted to the inboard side of the first sealing member. The inner ring of the bearing portion is fixed to the cylindrical portion of the hub shaft.Type: ApplicationFiled: July 31, 2008Publication date: February 5, 2009Applicant: JTEKT CorporationInventors: Keiichi Furukawa, Shigeaki Furusawa, Yutaka Koma, Shigeru Inoue
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Publication number: 20080219608Abstract: A body part of a rotation detecting sensor of a rotation number detector which is provided on a bearing apparatus for an axle has a large diameter part formed in its upper part and a small diameter part formed in its lower part, and at the same time, a sensor fitting hole part which is formed in an outer ring of a bearing part and into which the body part of the rotation detecting sensor is inserted is so formed that an radially outer part thereof has an inner diameter substantially equal to an outer diameter of the large diameter part of the body part, and a lower part thereof has an inner diameter slightly larger than an outer diameter of the small diameter part of the body part.Type: ApplicationFiled: February 21, 2008Publication date: September 11, 2008Applicant: JTEKT CORPORATIONInventors: Yutaka Koma, Joji Miyawaki, Takumi Harada, Shigeru Inoue
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Publication number: 20080174170Abstract: An axle bearing apparatus includes a hub shaft including a wheel-mounting flange formed at its outer end portion, and a cylindrical portion formed on an inner side surface of the flange, a bearing portion press-fitted on the cylindrical portion of the hub shaft and including an inner ring, an outer ring and rolling elements disposed between the inner and outer rings, and a slinger having a through hole formed through its central portion. The through hole is fitted on the cylindrical portion such that an outer diameter of the slinger is generally equal to an outer diameter of the flange, and the slinger is press-clamped to the inner side surface of the flange by bolts press-fitted respectively in a plurality of bolt holes formed in the flange. O-rings are interposed between the flange and the slinger.Type: ApplicationFiled: August 13, 2007Publication date: July 24, 2008Applicant: JTEKT CORPORATIONInventors: Shigeru Inoue, Chikayoshi Murotani, Shigeaki Furusawa, Takumi Harada, Yutaka Koma
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Publication number: 20080085662Abstract: A polishing tool comprising a support member, and polishing means fixed to the support member. The polishing means is composed of felt having a density of 0.20 g/cm3 or more and a hardness of 30 or more, and abrasive grains dispersed in the felt. A polishing method and apparatus involving pressing the polishing means against a surface of a workpiece to be polished, while rotating the workpiece and also rotating the polishing tool.Type: ApplicationFiled: November 29, 2007Publication date: April 10, 2008Inventors: Sinnosuke Sekiya, Setsuo Yamamoto, Yutaka Koma, Masashi Aoki, Naohiro Matsuya
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Publication number: 20080036290Abstract: An axle bearing apparatus includes a hub shaft for common use with a driving wheel bearing apparatus and a driven wheel bearing apparatus, the hub shaft including an axle-mounting flange formed at its outer end portion, and a cylindrical portion formed at an inner side of the flange and having a through hole formed in a center portion of the cylindrical portion, and a bearing portion press-fitted on the cylindrical portion of the hub shaft and including an inner ring, an outer ring and rolling elements disposed between the inner and outer rings. The hub shaft is used for the driven wheel bearing apparatus, and alternatively the through hole in the hub shaft is enlarged in diameter, and a spline are formed axially in an inner surface of the diameter-enlarged through hole, and the hub shaft thus processed is used for the driving wheel bearing apparatus.Type: ApplicationFiled: August 13, 2007Publication date: February 14, 2008Applicant: JTEKT CORPORATIONInventors: Shigeru Inoue, Takumi Harada, Yutaka Koma
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Publication number: 20040226927Abstract: A laser beam processing machine comprising a chuck table having a holding surface for holding a workpiece and a laser beam application means having a condenser for applying a laser beam to the workpiece held on the chuck table, whereinType: ApplicationFiled: May 13, 2004Publication date: November 18, 2004Inventors: Hiroshi Morikazu, Yutaka Koma
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Publication number: 20030082914Abstract: A semiconductor wafer processing apparatus grinds a surface of a semiconductor wafer by mechanical grinding, and then removes a damaged layer in the ground surface. In the processing apparatus, a grinding portion, a precenter portion, a wafer cleaning portion, plasma treatment portions, and magazines are arranged radially about an origin of a polar coordinate system of a third wafer transport portion having a robot mechanism, and their positions of arrangement are set such that the origin is located on lines of extension of wafer carry-in and carry-out center lines of the plasma treatment portions. Thus, the number of changed grippings of the semiconductor wafer can be minimized to prevent breakage of the semiconductor wafer. Moreover, transfer of the semiconductor wafer between the respective portions can be covered by the single robot mechanism, and the equipment can be made compact.Type: ApplicationFiled: December 11, 2002Publication date: May 1, 2003Inventors: Yutaka Koma, Kiyoshi Arita, Hiroshi Haji, Tetsuhiro Iwai
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Publication number: 20030075523Abstract: Disclosed is a grinding-and-etching system using a dry-etching for removing strains from plate-like objects such as semiconductor wafers, which are caused in grinding such objects. The system includes chuck table means (11) for fixedly holding plate-like objects, grinder means (12a, 12b) for grinding plate-like objects held on the chuck table means, washing means (13) for washing the post-grinding plate-like objects, and dry-etching means (14) for dry-etching the plate-like objects thus washed. The dry-etching does not require any strong acid which will produce an unwholesome gas to cause environmental pollution.Type: ApplicationFiled: November 25, 2002Publication date: April 24, 2003Inventor: Yutaka Koma