Patents by Inventor Motoshi Kawamura
Motoshi Kawamura 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: 9151328Abstract: The conical roller bearing includes an inner ring which includes an annular groove between an inner-ring-side raceway surface and a small-diameter-side end portion thereof, and a cage which includes an erected portion extending from a first annular portion of the cage towards the annular groove. The erected portion includes a first inclined portion and a second inclined portion. The first inclined portion is inclined towards conical rollers disposed in pockets of the cage while extending from the first annular portion towards the annular groove. The second inclined portion is inclined towards the small-diameter-side end portion while extending from the first inclined portion towards the annular groove. The second inclined portion is configured to be brought into engagement with the annular groove in an axial direction of the inner ring.Type: GrantFiled: October 10, 2013Date of Patent: October 6, 2015Assignee: JTEKT CORPORATIONInventors: Ryosuke Chudo, Motoshi Kawamura, Yoshihito Nakashima
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Publication number: 20150104126Abstract: The conical roller bearing includes an inner ring which includes an annular groove between an inner-ring-side raceway surface and a small-diameter-side end portion thereof, and a cage which includes an erected portion extending from a first annular portion of the cage towards the annular groove. The erected portion includes a first inclined portion and a second inclined portion. The first inclined portion is inclined towards conical rollers disposed in pockets of the cage while extending from the first annular portion towards the annular groove. The second inclined portion is inclined towards the small-diameter-side end portion while extending from the first inclined portion towards the annular groove. The second inclined portion is configured to be brought into engagement with the annular groove in an axial direction of the inner ring.Type: ApplicationFiled: October 10, 2013Publication date: April 16, 2015Applicant: JTEKT CORPORATIONInventors: Ryosuke CHUDO, Motoshi KAWAMURA, Yoshihito NAKASHIMA
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Patent number: 8534926Abstract: There is provided a clutch release bearing in which a water resistance is enhanced. At a side axially opposite from one side where an outer ring rib of a clutch release bearing is formed, there is provided a first seal member externally fitted to an outer ring to be fixed thereto. A seal lip disposed in sliding contact with an outside-diameter surface of an inner ring is formed at a radially-inward distal end of the first seal member. An annular guide is provided at a bearing-outward side of the first seal member, and an axial lip which extends toward the outside of the bearing and extends to be disposed radially outwardly of the guide is formed at a bearing-outward side face of the first seal member. The axial lip is disposed in non-contact, close relation to the guide to form a labyrinth. A radially outwardly-open groove is formed in a joint portion of the axial lip joined to the first seal member.Type: GrantFiled: May 27, 2009Date of Patent: September 17, 2013Assignee: Jtekt CorporationInventors: Akiyuki Suzuki, Takashi Sugimoto, Motoshi Kawamura, Kouhei Yamaguchi, Tetsuro Inoue, Yoshitaka Nakagawa
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Publication number: 20110129175Abstract: There is provided a clutch release bearing in which a water resistance is enhanced. At that a side axially opposite from one side where an outer ring rib of a clutch release bearing is formed, there is provided a first seal member externally fitted to an outer ring to be fixed thereto. A seal lip disposed in sliding contact with an outside-diameter surface of an inner ring is formed at a radially-inward distal end of the first seal member. An annular guide is provided at a bearing-outward side of the first seal member, and an axial lip which extends toward the outside of the bearing and extends to be disposed radially outwardly of the guide is formed at a bearing-outward side face of the first seal member. The axial lip is disposed in non-contact, close relation to the guide to form a labyrinth. A radially outwardly-open groove is formed in a joint portion of the axial lip joined to the first seal member.Type: ApplicationFiled: May 27, 2009Publication date: June 2, 2011Applicant: JTEKT CORPORATIONInventors: Akiyuki Suzuki, Takashi Sugimoto, Motoshi Kawamura, Kouhei Yamaguchi, Tetsuro Inoue, Yoshitaka Nakagawa
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Patent number: 7913827Abstract: An electromagnetic actuator includes a supporting member supporting an electromagnetic coil around which a wire is wound, a moving member positioned facing the supporting member so as to move forward and backward, and an actuating force transmitting member transmitting moving force of the moving member to a member to be actuated as an actuating force. The moving member is moved towards the supporting member by magnetic force generated by applying an electric current to the electromagnetic coil to apply the actuating force to the member to be actuated via the actuating force transmitting member. The electromagnetic coil includes a plurality of electromagnetic coils provided at the supporting member.Type: GrantFiled: May 15, 2007Date of Patent: March 29, 2011Assignee: JTEKT CorporationInventors: Yoshihiro Niikawa, Kunihiko Suzuki, Motoshi Kawamura
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Publication number: 20080309322Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.Type: ApplicationFiled: August 27, 2007Publication date: December 18, 2008Applicant: KOYO SEIKO CO., LTD.Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Patent number: 7350977Abstract: A ball bearing with double raceway rotatably supports a pinion shaft having a pinion gear on its one end. This ball bearing with double raceway is provided with: an outer ring member having a large-diameter raceway surface and a small-diameter raceway surface; an inner ring member having a large-diameter raceway surface and a small-diameter raceway surface that correspond to the large-diameter raceway surface and the small-diameter raceway surface of the outer ring member; a large-diameter-side row of balls that are interpolated between the two large-diameter raceway surfaces; a small-diameter-side row of balls that are interpolated between the two small-diameter raceway surfaces; a large-diameter-side cage that holds the large-diameter-side row of balls; and a small-diameter-side cage that holds the small-diameter-side row of balls.Type: GrantFiled: April 17, 2003Date of Patent: April 1, 2008Assignee: Jtekt CorporationInventors: Toshirou Fukuda, Hideo Ueda, Toshihiro Kawaguchi, Kunihiko Yokota, Motoshi Kawamura, Muneyasu Akiyama, Tomonori Nakashita
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Publication number: 20070262838Abstract: An electromagnetic actuator includes a supporting member supporting an electromagnetic coil around which a wire is wound, a moving member positioned facing the supporting member so as to move forward and backward, and an actuating force transmitting member transmitting moving force of the moving member to a member to be actuated as an actuating force. The moving member is moved towards the supporting member by magnetic force generated by applying an electric current to the electromagnetic coil to apply the actuating force to the member to be actuated via the actuating force transmitting member. The electromagnetic coil includes a plurality of electromagnetic coils provided at the supporting member.Type: ApplicationFiled: May 15, 2007Publication date: November 15, 2007Applicant: JTEKT CorporationInventors: Yoshihiro Niikawa, Kunihiko Suzuki, Motoshi Kawamura
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Patent number: 7287911Abstract: The present invention relates to a bearing device for supporting a pinion shaft so as to freely rotate with respect to a case. The bearing device comprises a first tilt-contact rolling bearing provided on the connecting-flange-side outer peripheral surface of the pinion shaft and a second tilt-contact rolling bearing formed from an angular ball bearing provided on the pinion-gear-side outer peripheral surface of the pinion shaft, wherein lines of action of the first and second tilt-contact rolling bearings intersect with one another on an outer diameter side, the connecting-flange-side end portion of the first tilt-contact rolling bearing and the pinion-gear-side end portion of the second tilt-contact rolling bearing are respectively sealed with seal members, a sealed space between the seal members is infilled with grease, and the connecting flange is fastened in the pinion-gear direction to thereby preload the first and second tilt-contact rolling bearings.Type: GrantFiled: November 8, 2002Date of Patent: October 30, 2007Assignee: JTEKT CorporationInventors: Hirofumi Dodoro, Akiyuki Suzuki, Kanichi Kouda, Motoshi Kawamura, Kunihiko Yokota, Toshirou Fukuda
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Publication number: 20070104403Abstract: A bearing apparatus for supporting a pinion shaft comprises a pair of rolling bearings which rotatably support a pinion shaft to a case and are arranged side by side in a shaft direction between a pinion gear arranged at one end of the pinion shaft, and a companion flange attached outside the other end thereof. The rolling bearing on a companion flange side comprises an angular ball bearing, and a radius of curvature Ri of an inner ring raceway, a radius of curvature Ro of an outer ring raceway, and a ball diameter Bd of the rolling bearing may satisfy a relationship given by equations of Ri<Ro, 0.502×Bd?Ri?0.512×Bd, and 0.510×Bd?Ro?0.520×Bd.Type: ApplicationFiled: December 11, 2003Publication date: May 10, 2007Applicant: Koyo Seiko Co., Ltd.Inventors: Motoshi Kawamura, Muneyasu Akiyama, Hiroshi Tachi
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Patent number: 7059777Abstract: An assembly for a ball bearing with double raceway assembled in an outer ring member provided with double row raceway surfaces apart from each other in an axial direction from one side in an axial direction, on an inner peripheral surface includes an inner ring member provided with double raceway surfaces apart from each other in an axial direction in correspondence to the double raceway surfaces on an outer peripheral surface, double row cages arranged in respective outer diameter sides of the double raceway surfaces of the inner ring member, and a plurality of ball rows respectively held by the double rows cages. The inner ring member is set to be non-separable from the respective cages and the respective ball rows, and can be assembled in the outer ring member from one side in the axial direction.Type: GrantFiled: September 24, 2003Date of Patent: June 13, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Toshihiro Kawaguchi, Hideo Ueda, Motoshi Kawamura
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Publication number: 20060119349Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.Type: ApplicationFiled: January 25, 2006Publication date: June 8, 2006Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Patent number: 7034521Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.Type: GrantFiled: July 2, 2002Date of Patent: April 25, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Publication number: 20050238273Abstract: A double row angular contact ball bearing with vertex of contact angles outside of bearing 6 is employed for supporting a pinion shaft 5, and an internal space of the bearing 6 is also sealed with seals 20 and 30 equipped at both ends thereof in a shaft direction, so that grease is filled in this sealed bearing internal space. In this case, oil being used for a target apparatus for use of the pinion shaft 5 is not introduced inside the bearing 6, so that problems which have been generated in a conventional example where said oil has been introduced inside the bearing 6 can be cleared up.Type: ApplicationFiled: December 11, 2003Publication date: October 27, 2005Applicant: Koyo Seiko Co., Ltd.Inventors: Motoshi Kawamura, Takeshi Iwawaki, Kunihiko Yokota
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Publication number: 20050232524Abstract: A ball bearing with double raceway rotatably supports a pinion shaft having a pinion gear on its one end. This ball bearing with double raceway is provided with: an outer ring member having a large-diameter raceway surface and a small-diameter raceway surface; an inner ring member having a large-diameter raceway surface and a small-diameter raceway surface that correspond to the large-diameter raceway surface and the small-diameter raceway surface of the outer ring member; a large-diameter-side row of balls that are interpolated between the two large-diameter raceway surfaces; a small-diameter-side row of balls that are interpolated between the two small-diameter raceway surfaces; a large-diameter-side cage that holds the large-diameter-side row of balls; and a small-diameter-side cage that holds the small-diameter-side row of balls.Type: ApplicationFiled: April 17, 2003Publication date: October 20, 2005Applicant: Koyo Seiko Co., Ltd.Inventors: Toshirou Fukuda, Hideo Ueda, Toshihiro Kawaguchi, Kunihiko Yokota, Motoshi Kawamura, Muneyasu Akiyama, Tomonori Nakashita
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Patent number: 6943542Abstract: This wheel speed detector is constructed of a magnetic sensor and a magnetic ring and is integrated with the inside of a seal device. The magnetic ring constitutes a part (core bar) of the seal device. This arrangement can enable the compacting and reduction in the number of components and improve space saving and assembling workability.Type: GrantFiled: April 30, 2003Date of Patent: September 13, 2005Assignee: Sharp Kabushiki KaishaInventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Publication number: 20050031240Abstract: The present invention relates to a bearing device for supporting a pinion shaft so as to freely rotate with respect to a case. The bearing device comprises a first tilt-contact rolling bearing provided on the connecting-flange-side outer peripheral surface of the pinion shaft and a second tilt-contact rolling bearing formed from an angular ball bearing provided on the pinion-gear-side outer peripheral surface of the pinion shaft, wherein lines of action of the first and second tilt-contact rolling bearings intersect with one another on an outer diameter side, the connecting-flange-side end portion of the first tilt-contact rolling bearing and the pinion-gear-side end portion of the second tilt-contact rolling bearing are respectively sealed with seal members, a sealed space between the seal members is infilled with grease, and the connecting flange is fastened in the pinion-gear direction to thereby preload the first and second tilt-contact rolling bearings.Type: ApplicationFiled: November 8, 2002Publication date: February 10, 2005Inventors: Hirofumi Dodoro, Akiyuki Suzuki, Kanichi Kouda, Motoshi Kawamura, Kunihiko Yokota, Toshirou Fukuda
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Publication number: 20040109624Abstract: An assembly for a ball bearing with double raceway assembled in an outer ring member provided with double row raceway surfaces apart from each other in an axial direction from one side in an axial direction, on an inner peripheral surface includes an inner ring member provided with double raceway surfaces apart from each other in an axial direction in correspondence to the double raceway surfaces on an outer peripheral surface, double row cages arranged in respective outer diameter sides of the double raceway surfaces of the inner ring member, and a plurality of ball rows respectively held by the double rows cages. The inner ring member is set to be non-separable from the respective cages and the respective ball rows, and can be assembled in the outer ring member from one side in the axial direction.Type: ApplicationFiled: September 24, 2003Publication date: June 10, 2004Inventors: Toshihiro Kawaguchi, Hideo Ueda, Motoshi Kawamura
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Publication number: 20030205999Abstract: This wheel speed detector is constructed of a magnetic sensor and a magnetic ring and is integrated with the inside of a seal device. The magnetic ring constitutes a part (core bar) of the seal device. This arrangement can enable the compacting and reduction in the number of components and improve space saving and assembling workability.Type: ApplicationFiled: April 30, 2003Publication date: November 6, 2003Applicant: Koyo Seiko Co., Ltd.Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi
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Patent number: 6605938Abstract: This ring speed detector is constructed of a magnetic sensor and a magnetic ring and is integrated with the inside of a seal device. The magnetic ring constitutes a part (core bar) of the seal device. This arrangement can enable the compacting and reduction in the number of components and improve space saving and assembling workability.Type: GrantFiled: June 1, 2000Date of Patent: August 12, 2003Assignee: Koyo Seiko Co., Ltd.Inventors: Minoru Sentoku, Motoshi Kawamura, Kazutoshi Toda, Nobuyuki Seo, Naoki Morimura, Tomohiro Ishii, Kanichi Kouda, Yoshifumi Shige, Fujio Harumi