Patents by Inventor Katsuji Watanabe

Katsuji Watanabe 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).

  • Patent number: 8584533
    Abstract: A magnetostrictive torque sensor device which detects a torque applied to a rotary shaft is provided. The magnetostrictive torque sensor device includes a magnetostrictive portion provided on a surface of the rotary shaft, a coil and a cylindrical back-yoke disposed in outer periphery of the coil. The coil includes a bobbin arranged in outer periphery of the magnetostrictive portion, and a wire wound around the bobbin. A slit is provided on the back-yoke.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: November 19, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takashi Miyoshi, Yoshihiro Oniwa, Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura, Katsuji Watanabe
  • Patent number: 8294311
    Abstract: An electric motor having a rotation shaft includes a motor housing into which the electric motor is accommodated, at least one pair of rolling bearings positioned in the motor housing and rotatably supporting both ends of the rotation shaft, and a displacement restriction member provided inside the motor housing and restricting a displacement of the rolling bearing in an axial direction of the rolling bearing. Each rolling bearing includes an inner race, an outer race, and rolling elements rotatably supported between the inner race and the outer race. The inner race is press fitted without any gaps onto an outer peripheral surface of the rotation shaft, and the outer race is press fitted without any gaps into a bearing attachment portion provided inside the motor housing.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: October 23, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takashi Miyoshi, Yasuo Shimizu, Atsuhiko Yoneda, Katsuhiro Saito, Ryoji Toyofuku, Katsuji Watanabe
  • Publication number: 20120248724
    Abstract: A vehicle steering device in which steering torque is transmitted from a steering wheel to steered wheels via a rack-and-pinion mechanism. The steering device comprises a rack shaft in which a rack is formed, two rack support parts positioned to both sides of a longitudinal direction of the rack shaft relative to the position of a pinion, and an urging part positioned between the two rack support parts. The two rack support parts are positioned near each other so as to support only a back surface of the region where the rack is formed in the rack shaft which is positioned in a steering neutral position, the back surface being supported so as to be capable of sliding in the longitudinal direction. The urging part urges the rack shaft in at least a direction other than towards the rack.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 4, 2012
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Katsuji Watanabe, Kenji Hattori
  • Patent number: 8225483
    Abstract: The torque sensor includes a plurality of coil units having a substantially cylindrical shape, the coil units including a plurality of detection coils arranged to face a magnetic characteristic change portion formed on a rotary shaft. The coil units include a first coil unit and a second coil unit, and the first coil unit and the second coil unit are disposed in the axial direction of the shaft. The first coil unit and the second coil unit are fixed in an integrally molded resin. Thereby, there is provided a torque sensor having a high productivity and an easy configuration and a method of manufacturing the torque sensor.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: July 24, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Watanabe, Yasuo Shimizu, Atsuhiko Yoneda, Tsunehiko Fukatsu
  • Patent number: 8181549
    Abstract: An electric power steering apparatus 10 has an electric motor 46 for supplying an auxiliary force to a steering force inputted from a steering wheel 16, and transmits the steering force including the auxiliary force to a steered road-wheel 14 at least partially via a rack-and-pinion mechanism 30, thereby performing steering of a vehicle 12. The rack-and-pinion mechanism 30 includes: a pinion 38 provided at a pinion shaft 28 connected to the steering wheel 16; a rack 40 that is provided over a predetermined width at a rack shaft 32 connected to the steered road-wheel 14, and that is engaged with the pinion 38; and a rack guide 70 for urging the rack shaft 32 toward the pinion 38. A pressure angle ?1 of a tooth root of the rack 40 is set to be greater than a pressure angle ?0 of a tooth tip of the rack 40.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: May 22, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Watanabe, Yasuo Shimizu, Tsuyoshi Matsuo, Yousuke Tanaka
  • Patent number: 8066092
    Abstract: An electric power steering device is configured to transmit an auxiliary torque to a steering unit of front wheels, and includes: an operator; an electric motor configured to generate the auxiliary torque in accordance with at least a steering torque generated by input from the operator; the steering unit of front wheels which includes a pinion shaft; and a rotation terminating mechanism which provides a motion terminating end of the operator, the rotation terminating mechanism being disposed between the operator and the pinion shaft.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: November 29, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Katsuji Watanabe, Atsuhiko Yoneda, Shigeru Yamawaki
  • Patent number: 8042818
    Abstract: An electric damper which does not transmit unbalance wheel vibration to a vehicle body is provided. A low-pass cutoff frequency setting unit and a high-pass cutoff frequency setting unit respectively set the cutoff frequencies for band-stop filters to a frequency band corresponding to unbalance wheel vibration based on a signal indicating a vehicle speed from a vehicle speed sensor, and a function as a band-stop filter comprising a low-pass filter computation unit, a high-pass filter computation unit and an adder is computed for a displacement rate of the vertical motion of a wheel calculated by a differentiating unit in a damper control unit. A damper control amount computation unit calculates a control amount of controlling an electric motor for a motor-driven damper based on the calculated filtered displacement rate, and outputs a control signal to a motor driving unit through a driving circuit output unit.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: October 25, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Shigeru Yamawaki, Yasuo Shimizu, Katsuji Watanabe, Atsuhiko Yoneda
  • Patent number: 7870805
    Abstract: A rack-and-pinion steering apparatus in which a steering gear box for transmitting an operation of a steering wheel to road wheels includes a pinion operatively connected to the steering wheel, a rack bar which has a rack meshing with the pinion, and which is operatively connected to the road wheels, a housing slidably supporting the rack bar, a cylindrical rack guide slidably fitted into a guide hole formed in the housing, and a spring member causing the rack guide to abut on a rear part of the rack bar opposite to the rack by biasing the rack guide. A reaction force, which the rack guide receives from the rack bar, acts on the rack guide in such a way as to cause a rotational moment of the rack guide about an axis different from an axis of the rack guide.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: January 18, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tsuyoshi Matsuo, Yasuo Shimizu, Katsuji Watanabe
  • Patent number: 7814808
    Abstract: Worm gear mechanism includes a driving worm, a torque delivering worm wheel meshing with the worm, and an auxiliary worm wheel superimposed on the torque delivering worm wheel. The auxiliary worm wheel has a pitch diameter greater than that of the torque delivering worm wheel. The auxiliary worm wheel is biased against the driving worm wheel via a biasing member in the form of a leaf spring.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: October 19, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Katsuji Watanabe, Takahiro Aoki, Yasuhiro Terada, Ryoji Toyofuku
  • Patent number: 7806016
    Abstract: A worm gear mechanism includes a worm, a torque-transmitting worm wheel meshing with the worm, and an auxiliary worm wheel disposed concentrically with the torque-transmitting worm wheel. The auxiliary worm wheel has a pitch circle diameter set to be greater than a pitch circle diameter of the torque-transmitting worm wheel and hence meshes with the worm in a meshing phase different from that of the torque-transmitting worm wheel. A screw thread provided on the worm actually meshes with teeth of the torque-transmitting worm wheel along a length defined as an actual meshing length. The screw thread has an effective length reduced to be approximately equal to the actual meshing length.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: October 5, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Katsuji Watanabe
  • Patent number: 7806005
    Abstract: This magnetostrictive torque sensor includes: a shaft made of a magnetized material; a magnetostrictive portion provided on the shaft at a position distanced for a predetermined length from an end of the shaft; a detection coil that is arranged so as to face the magnetostrictive portion, and detects a change in a magnetic characteristic of the magnetostrictive portion; and a plating made of an nonmagnetic material, that is provided on the end of the shaft.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: October 5, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Watanabe, Yasuo Shimizu
  • Patent number: 7654167
    Abstract: An electric power steering apparatus includes a worm gear mechanism for transmitting the torque generated by an electric motor to a steered road wheel of the vehicle. The worm gear mechanism has a worm gear made of metal and a worm wheel formed of plastic material and meshing with the worm gear. The worm gear has a tooth profile including a dedendum part formed in an involute shape and an addendum part formed in a circular arc shape with a center located on a line of action.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: February 2, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Watanabe, Yasuo Shimizu
  • Patent number: 7624653
    Abstract: The torque sensor includes a plurality of coil units having a substantially cylindrical shape, the coil units including a plurality of detection coils arranged to face a magnetic characteristic change portion formed on a rotary shaft. The coil units include a first coil unit and a second coil unit, and the first coil unit and the second coil unit are disposed in the axial direction of the shaft. The first coil unit and the second coil unit are fixed in an integrally molded resin. Thereby, there is provided a torque sensor having a high productivity and an easy configuration and a method of manufacturing the torque sensor.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: December 1, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Watanabe, Yasuo Shimizu, Atsuhiko Yoneda, Tsunehiko Fukatsu
  • Publication number: 20090288288
    Abstract: The torque sensor includes a plurality of coil units having a substantially cylindrical shape, the coil units including a plurality of detection coils arranged to face a magnetic characteristic change portion formed on a rotary shaft. The coil units include a first coil unit and a second coil unit, and the first coil unit and the second coil unit are disposed in the axial direction of the shaft. The first coil unit and the second coil unit are fixed in an integrally molded resin. Thereby, there is provided a torque sensor having a high productivity and an easy configuration and a method of manufacturing the torque sensor.
    Type: Application
    Filed: July 29, 2009
    Publication date: November 26, 2009
    Applicant: HONDA MOTOR CO., LTD
    Inventors: Katsuji Watanabe, Yasuo Shimizu, Atsuhiko Yoneda, Tsunehiko Fukatsu
  • Publication number: 20090250288
    Abstract: An electric power steering apparatus 10 has an electric motor 46 for supplying an auxiliary force to a steering force inputted from a steering wheel 16, and transmits the steering force including the auxiliary force to a steered road-wheel 14 at least partially via a rack-and-pinion mechanism 30, thereby performing steering of a vehicle 12. The rack-and-pinion mechanism 30 includes: a pinion 38 provided at a pinion shaft 28 connected to the steering wheel 16; a rack 40 that is provided over a predetermined width at a rack shaft 32 connected to the steered road-wheel 14, and that is engaged with the pinion 38; and a rack guide 70 for urging the rack shaft 32 toward the pinion 38. A pressure angle ?1 of a tooth root of the rack 40 is set to be greater than a pressure angle ?0 of a tooth tip of the rack 40.
    Type: Application
    Filed: April 1, 2009
    Publication date: October 8, 2009
    Applicant: Honda Motor Co., Ltd.
    Inventors: Katsuji Watanabe, Yasuo Shimizu, Tsuyoshi Matsuo, Yousuke Tanaka
  • Publication number: 20090224502
    Abstract: An electric damper which does not transmit unbalance wheel vibration to a vehicle body is provided. A low-pass cutoff frequency setting unit and a high-pass cutoff frequency setting unit respectively set the cutoff frequencies for band-stop filters to a frequency band corresponding to unbalance wheel vibration based on a signal indicating a vehicle speed from a vehicle speed sensor, and a function as a band-stop filter comprising a low-pass filter computation unit, a high-pass filter computation unit and an adder is computed for a displacement rate of the vertical motion of a wheel calculated by a differentiating unit in a damper control unit. A damper control amount computation unit calculates a control amount of controlling an electric motor for a motor-driven damper based on the calculated filtered displacement rate, and outputs a control signal to a motor driving unit through a driving circuit output unit.
    Type: Application
    Filed: March 3, 2009
    Publication date: September 10, 2009
    Applicant: HONDA MOTOR CO. LTD.
    Inventors: Shigeru YAMAWAKI, Yasuo Shimizu, Katsuji Watanabe, Atsuhiko Yoneda
  • Publication number: 20090218162
    Abstract: A magnetostrictive torque sensor device which detects a torque applied to a rotary shaft is provided. The magnetostrictive torque sensor device includes a magnetostrictive portion provided on a surface of the rotary shaft, a coil and a cylindrical back-yoke disposed in outer periphery of the coil. The coil includes a bobbin arranged in outer periphery of the magnetostrictive portion, and a wire wound around the bobbin. A slit is provided on the back-yoke.
    Type: Application
    Filed: March 2, 2009
    Publication date: September 3, 2009
    Applicant: Honda Motor Co., Ltd.
    Inventors: Takashi Miyoshi, Yoshihiro Oniwa, Yasuo Shimizu, Atsuhiko Yoneda, Yutaka Arimura, Katsuji Watanabe
  • Publication number: 20090114470
    Abstract: An electric power steering device is configured to transmit an auxiliary torque to a steering unit of front wheels, and includes: an operator; an electric motor configured to generate the auxiliary torque in accordance with at least a steering torque generated by input from the operator; the steering unit of front wheels which includes a pinion shaft; and a rotation terminating mechanism which provides a motion terminating end of the operator, the rotation terminating mechanism being disposed between the operator and the pinion shaft.
    Type: Application
    Filed: November 4, 2008
    Publication date: May 7, 2009
    Applicant: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Katsuji Watanabe, Atsuhiko Yoneda, Shigeru Yamawaki
  • Publication number: 20090107271
    Abstract: A rack-and-pinion steering apparatus in which a steering gear box for transmitting an operation of a steering wheel to road wheels includes a pinion operatively connected to the steering wheel, a rack bar which has a rack meshing with the pinion, and which is operatively connected to the road wheels, a housing slidably supporting the rack bar, a cylindrical rack guide slidably fitted into a guide hole formed in the housing, and a spring member causing the rack guide to abut on a rear part of the rack bar opposite to the rack by biasing the rack guide. A reaction force, which the rack guide receives from the rack bar, acts on the rack guide in such a way as to cause a rotational moment of the rack guide about an axis different from an axis of the rack guide.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 30, 2009
    Applicant: Honda Motor Co., Ltd.
    Inventors: Tsuyoshi Matsuo, Yasuo Shimizu, Katsuji Watanabe
  • Patent number: 7377194
    Abstract: Worm gear mechanism is provided which includes a worm, a torque-transmitting worm wheel and an auxiliary worm wheel. In order to secure a sufficient face width of the torque-transmitting worm wheel, a pitch diameter of the auxiliary worm wheel is set to be greater than a pitch diameter of the torque-transmitting worm wheel. Thus, undesired backlash can be eliminated by the auxiliary worm wheel meshing with the worm with a different meshing phase from the torque-transmitting worm wheel.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: May 27, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Katsuji Watanabe