Patents by Inventor Eiichirou Tsujii

Eiichirou Tsujii 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: 9193409
    Abstract: A saddle riding type vehicle includes a stabilizer arranged to support a pair of wheels arranged at opposite sides of a vehicle body to be movable up and down relative to the vehicle body, and a switching mechanism arranged to switch between a movable state in which the pair of wheels are permitted to move up and down and a locked state in which the pair of wheels are restricted from moving up and down. The switching mechanism includes a coupling pin member arranged to engage with the stabilizer to set the stabilizer to the locked state thereby restricting rotation of the stabilizer relative to the vehicle body, and to disengage from the stabilizer to set the stabilizer to the movable state thereby permitting rotation of the stabilizer relative to the vehicle body, and a solenoid fixed to the vehicle body and arranged to drive the coupling pin member into and out of engagement with the stabilizer.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: November 24, 2015
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Eiichirou Tsujii, Kazuhiro Nishida, Masayuki Hirano, Toshio Takeuchi
  • Patent number: 8915323
    Abstract: A two-rear-wheel electric vehicle configured to lean its vehicle body frame when turning includes a vehicle body frame, a pair of right and left rear arms, a battery, and a shock absorber. The vehicle body frame includes a head pipe, a front inclined portion, a bottom portion, and a rear inclined portion. The front inclined portion extends obliquely downward and rearward from the head pipe. The bottom portion includes a front support portion that supports a front end portion of the shock absorber. The bottom portion extends rearward in a front-back direction of the vehicle from a rear end portion of the front inclined portion. The rear inclined portion includes a battery support portion, and extends obliquely upward and rearward from a rear end portion of the bottom portion. A swing shaft is positioned rearward of the front support portion and below the battery support portion.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: December 23, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Junji Terada, Atsushi Ueno, Masatoshi Yamada
  • Publication number: 20140238764
    Abstract: A two-rear-wheel electric vehicle configured to lean its vehicle body frame when turning includes a vehicle body frame, a pair of right and left rear arms, a battery, and a shock absorber. The vehicle body frame includes a head pipe, a front inclined portion, a bottom portion, and a rear inclined portion. The front inclined portion extends obliquely downward and rearward from the head pipe. The bottom portion includes a front support portion that supports a front end portion of the shock absorber. The bottom portion extends rearward in a front-back direction of the vehicle from a rear end portion of the front inclined portion. The rear inclined portion includes a battery support portion, and extends obliquely upward and rearward from a rear end portion of the bottom portion. A swing shaft is positioned rearward of the front support portion and below the battery support portion.
    Type: Application
    Filed: October 1, 2012
    Publication date: August 28, 2014
    Inventors: Eiichirou Tsujii, Junji Terada, Atsushi Ueno, Masatoshi Yamada
  • Patent number: 8746717
    Abstract: A saddle riding type vehicle includes a right wheel and a left wheel, a right lower arm and a left lower arm swingably provided on a vehicle arranged to support the right wheel and the left wheel to be movable up and down, and a right stopper member and a left stopper member arranged to contact the right lower arm and the left lower arm to stop the vehicle body from leaning in excess of a predetermined amount, which do not stop leaning of the vehicle body when the lean amount of the vehicle body is less than the predetermined amount. The vehicle body is arranged to lean freely when the lean amount of the vehicle body is in a range not exceeding the predetermined amount. Therefore, the rider can preferably travel comfortably.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: June 10, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Kazuhiro Nishida, Atsushi Imai
  • Publication number: 20120248717
    Abstract: A saddle riding type vehicle of this invention includes a right wheel and a left wheel, a right lower arm and a left lower arm swingably provided on a vehicle arranged to support the right wheel and the left wheel to be movable up and down, and a right stopper member and a left stopper member arranged to contact the right lower arm and the left lower arm to stop the vehicle body from leaning in excess of a predetermined amount, which do not stop leaning of the vehicle body when the lean amount of the vehicle body is less than the predetermined amount. The vehicle body is arranged to lean freely when the lean amount of the vehicle body is in a range not exceeding the predetermined amount. Therefore, the rider can preferably travel comfortably.
    Type: Application
    Filed: December 6, 2010
    Publication date: October 4, 2012
    Applicant: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Kazuhiro Nishida, Atsushi Imai
  • Patent number: 8260504
    Abstract: A saddle riding type vehicle includes a balancer beam rotatably mounted on a vehicle body to cause a right wheel and a left wheel to move up and down in opposite directions, and is capable of making turns by leaning the vehicle body. The saddle riding type vehicle also includes a headlight, a drive mechanism arranged to rotate the headlight, a front detector arranged to detect a rotation angle of the balancer beam relative to the vehicle body, and a controller programmed to control the drive mechanism based on a result of detection by the front detector. The rotation angle detected by the front detector corresponds to an angle of the vehicle body leaning sideways relative to a traveling surface (relative lean angle). The controller controls the drive mechanism based on such result of detection by the front detector. The headlight can therefore illuminate directions of movement properly.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: September 4, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Yosuke Hirayama, Atsushi Imai, Kazuhiro Nishida, Masayuki Hirano, Toshio Takeuchi
  • Publication number: 20110060494
    Abstract: A saddle riding type vehicle includes a stabilizer arranged to support a pair of wheels arranged at opposite sides of a vehicle body to be movable up and down relative to the vehicle body, and a switching mechanism arranged to switch between a movable state in which the pair of wheels are permitted to move up and down and a locked state in which the pair of wheels are restricted from moving up and down. The switching mechanism includes a coupling pin member arranged to engage with the stabilizer to set the stabilizer to the locked state thereby restricting rotation of the stabilizer relative to the vehicle body, and to disengage from the stabilizer to set the stabilizer to the movable state thereby permitting rotation of the stabilizer relative to the vehicle body, and a solenoid fixed to the vehicle body and arranged to drive the coupling pin member into and out of engagement with the stabilizer.
    Type: Application
    Filed: August 23, 2010
    Publication date: March 10, 2011
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Eiichirou TSUJII, Kazuhiro NISHIDA, Masayuki HIRANO, Toshio TAKEUCHI
  • Patent number: 7878290
    Abstract: A saddle riding type vehicle capable of making turns by leaning a vehicle body includes a pair of rear wheels provided at opposite sides of the vehicle body, a pair of support mechanisms arranged to support the pair of rear wheels to be movable, independently of each other, up and down about a pivot axis relative to the vehicle body, an engine disposed forward of the pivot axis to produce a drive force, a differential mechanism arranged to distribute the drive force of the engine to the pair of rear wheels and to absorb a rotating speed difference between the pair of rear wheels at a time of making a turn, the differential mechanism including drive shafts arranged between the engine and the pivot axis, a pair of shaft drive mechanisms provided for the pair of rear wheels, respectively, and arranged to transmit the drive force of the differential mechanism to the pair of rear wheels, and a pair of constant velocity universal joints provided for the pair of shaft drive mechanisms, respectively, each including a
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: February 1, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Masayuki Hirano, Takeshi Toyota, Sachiyo Hasegawa, Isao Fujii
  • Publication number: 20100168966
    Abstract: A saddle riding type vehicle includes a balancer beam rotatably mounted on a vehicle body to cause a right wheel and a left wheel to move up and down in opposite directions, and is capable of making turns by leaning the vehicle body. The saddle riding type vehicle also includes a headlight, a drive mechanism arranged to rotate the headlight, a front detector arranged to detect a rotation angle of the balancer beam relative to the vehicle body, and a controller programmed to control the drive mechanism based on a result of detection by the front detector. The rotation angle detected by the front detector corresponds to an angle of the vehicle body leaning sideways relative to a traveling surface (relative lean angle). The controller controls the drive mechanism based on such result of detection by the front detector. The headlight can therefore illuminate directions of movement properly.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 1, 2010
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Eiichirou TSUJII, Yosuke HIRAYAMA, Atsushi IMAI, Kazuhiro NISHIDA, Masayuki HIRANO, Toshio TAKEUCHI
  • Publication number: 20100147615
    Abstract: A saddle riding type vehicle capable of making turns by leaning a vehicle body includes a pair of rear wheels provided at opposite sides of the vehicle body, a pair of support mechanisms arranged to support the pair of rear wheels to be movable, independently of each other, up and down about a pivot axis relative to the vehicle body, an engine disposed forward of the pivot axis to produce a drive force, a differential mechanism arranged to distribute the drive force of the engine to the pair of rear wheels and to absorb a rotating speed difference between the pair of rear wheels at a time of making a turn, the differential mechanism including drive shafts arranged between the engine and the pivot axis, a pair of shaft drive mechanisms provided for the pair of rear wheels, respectively, and arranged to transmit the drive force of the differential mechanism to the pair of rear wheels, and a pair of constant velocity universal joints provided for the pair of shaft drive mechanisms, respectively, each including a
    Type: Application
    Filed: December 7, 2009
    Publication date: June 17, 2010
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Eiichirou TSUJII, Masayuki HIRANO, Takeshi TOYOTA, Sachiyo HASEGAWA, Isao FUJII
  • Patent number: 7497294
    Abstract: The present invention provides a vehicle, such as a motorcycle, that can sufficiently control a stagger in an extremely slow speed running state and a tumble of vehicle body in the standstill state thereof. This vehicle, such as a motorcycle includes a head pipe that supports a front wheel and a main frame that supports a rear wheel. The head pipe is movably attached to the main frame. The vehicle includes a hydraulic cylinder for shifting the centroid of the vehicle body by moving one of the head pipe and the main frame 3 relative to the other.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: March 3, 2009
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Eiichirou Tsujii, Hitoshi Watanabe, Hiroshi Kitagawa
  • Publication number: 20060151225
    Abstract: The present invention provides a vehicle, such as a motorcycle, that can sufficiently control a stagger in an extremely slow speed running state and a tumble of vehicle body in the standstill state thereof. This vehicle, such as a motorcycle includes a head pipe that supports a front wheel and a main frame that supports a rear wheel. The head pipe is movably attached to the main frame. The vehicle includes a hydraulic cylinder for shifting the centroid of the vehicle body by moving one of the head pipe and the main frame 3 relative to the other.
    Type: Application
    Filed: December 27, 2005
    Publication date: July 13, 2006
    Inventors: Eiichirou Tsujii, Hitoshi Watanabe, Hiroshi Kitagawa
  • Patent number: 5984059
    Abstract: A pair of combined accumulator and control devices for interconnected suspension units having a simplified construction and wherein unequal displacement of fluid from the associated suspension units will cause an increase in the effective damping of the suspension unit having the greatest fluid displacement.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: November 16, 1999
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Makoto Kurachi, Mineo Yamamoto, Eiichirou Tsujii