Patents by Inventor Toshirou Fukuda
Toshirou Fukuda 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: 8371759Abstract: In a double row rolling bearing for supporting a pinion shaft, an outer ring is fixed to an inner peripheral surface of an annular wall (case) with its axis disposed horizontally, and an inner ring assembly is fitted on a pinion shaft, and is inserted, together with the pinion shaft, horizontally into the outer ring through a larger-diameter opening of the outer ring, and is mounted in the outer ring. A larger-diameter cage has a drop limitation portion for limiting the vertically-downward movement of the larger-diameter case.Type: GrantFiled: April 2, 2007Date of Patent: February 12, 2013Assignee: JTEKT CorporationInventors: Toshirou Fukuda, Yuzuru Takahashi, Toshihiro Kawaguchi, Hiroyuki Ooshima, Kiyokane Iwamoto
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Patent number: 7934871Abstract: The large diameter cage has an asymmetric shape, a diameter (discharge diameter) of which close to an opening is larger than a diameter (inflow diameter) close to the small diameter cage, and the small diameter cage has a symmetric shape, in which a diameter (inflow diameter) of which close to an opening is equal to a diameter (discharge diameter) close to the large diameter cage.Type: GrantFiled: March 11, 2008Date of Patent: May 3, 2011Assignee: JTEKT CorporationInventors: Toshihiro Kawaguchi, Toshirou Fukuda, Yuzuru Takahashi
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Patent number: 7828483Abstract: An upper surface of an outer ring is disposed axially inwardly of an end surface of a larger-diameter annular portion of a cage, and an outer diameter of the end surface of the larger-diameter annular portion of the cage is larger than an inner diameter of a lower surface of the outer ring. Chamfered portions for facilitating the taking-out of an outer ring assembly from the lower side of a stack of outer ring assemblies are formed respectively at the end surface of the larger-diameter annular portion of the cage and the lower surface of the outer ring.Type: GrantFiled: August 6, 2007Date of Patent: November 9, 2010Assignee: JTEKT CorporationInventor: Toshirou Fukuda
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Publication number: 20100202721Abstract: In a double row rolling bearing for supporting a pinion shaft, an outer ring is fixed to an inner peripheral surface of an annular wall (case) with its axis disposed horizontally, and an inner ring assembly is fitted on a pinion shaft, and is inserted, together with the pinion shaft, horizontally into the outer ring through a larger-diameter opening of the outer ring, and is mounted in the outer ring. A larger-diameter cage has a drop limitation portion for limiting the vertically-downward movement of the larger-diameter case.Type: ApplicationFiled: April 2, 2007Publication date: August 12, 2010Inventors: Toshirou Fukuda, Takahashi Yuzuru, Kawaguchi Toshihiro, Ooshima Hiroyuki, Iwamoto Kiyokane
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Patent number: 7597482Abstract: A skew contact double row ball bearing and a bearing device for supporting a pinion shaft. The skew contact double row ball bearing enabling the simultaneous contact of a ball row in each row on raceways at a specified contact angle when installed even if a clearance amount is reduced by the fitting of the bearing by preventing the ball bearing from being substantially affected by a change in the assembled width of each row by the fitting of the bearing. The axially double row ball rows are interposed between the raceways of inner and outer rings and at pitch circle diameters different from each other and at contact angles different from each other so that the radial clearance of the ball row with the smaller contact angle is set larger than the radial clearance of the ball row with the larger contact angle.Type: GrantFiled: March 10, 2005Date of Patent: October 6, 2009Assignee: JTEKT CorporationInventors: Toshirou Fukuda, Hiroyuki Ooshima
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Publication number: 20090028483Abstract: The large diameter cage has an asymmetric shape, a diameter (discharge diameter) of which close to an opening is larger than a diameter (inflow diameter) close to the small diameter cage, and the small diameter cage has a symmetric shape, in which a diameter (inflow diameter) of which close to an opening is equal to a diameter (discharge diameter) close to the large diameter cage.Type: ApplicationFiled: March 11, 2008Publication date: January 29, 2009Applicant: JTEKT CORPORATIONInventors: Toshihiro Kawaguchi, Toshirou Fukuda, Yuzuru Takahashi
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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: 20080031560Abstract: An upper surface of an outer ring is disposed axially inwardly of an end surface of a larger-diameter annular portion of a cage, and an outer diameter of the end surface of the larger-diameter annular portion of the cage is larger than an inner diameter of a lower surface of the outer ring. Chamfered portions for facilitating the taking-out of an outer ring assembly from the lower side of a stack of outer ring assemblies are formed respectively at the end surface of the larger-diameter annular portion of the cage and the lower surface of the outer ring.Type: ApplicationFiled: August 6, 2007Publication date: February 7, 2008Applicant: JTEKT CorporationInventor: Toshirou Fukuda
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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: 20070196037Abstract: A skew contact double row ball bearing and a bearing device for supporting a pinion shaft. The skew contact double row ball bearing enabling the simultaneous contact of a ball row in each row on raceways at a specified contact angle when installed even if a clearance amount is reduced by the fitting of the bearing by preventing the ball bearing from being substantially affected by a change in the assembled width of each row by the fitting of the bearing. The axially double row ball rows are interposed between the raceways of inner and outer rings and at pitch circle diameters different from each other and at contact angles different from each other so that the radial clearance of the ball row with the smaller contact angle is set larger than the radial clearance of the ball row with the larger contact angle.Type: ApplicationFiled: March 10, 2005Publication date: August 23, 2007Inventors: Toshirou Fukuda, Hiroyuki Ooshima
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Publication number: 20070133914Abstract: A tapered roller bearing device has an inner ring 1, an outer ring 2, tapered rollers 3, a retainer 5 and a shield plate 6. The inner ring 1 has a flange portion 1a brought in contact with minor diameter end surfaces of the tapered rollers 3. The shield plate 6 is placed brought in contact with an end surface of the flange portion 1a of the inner ring 1. The shield plate 6 has a protrusion 9 that protrudes radially outwardly of the flange portion 1a. The protrusion 9 is placed in a place having an interval from the retainer 5 in an axial direction of the inner ring 1.Type: ApplicationFiled: November 8, 2004Publication date: June 14, 2007Inventors: Hiroki Matsuyama, Hiroyuki Chiba, Kazuhisa Kitamura, Kazuyoshi Yamakawa, Toshirou Fukuda, Hirofumi Dodoro, Kazutoshi Toda
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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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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