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).
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Patent number: 9193409Abstract: 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: GrantFiled: August 23, 2010Date of Patent: November 24, 2015Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Eiichirou Tsujii, Kazuhiro Nishida, Masayuki Hirano, Toshio Takeuchi
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Patent number: 8915323Abstract: 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: GrantFiled: October 1, 2012Date of Patent: December 23, 2014Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Eiichirou Tsujii, Junji Terada, Atsushi Ueno, Masatoshi Yamada
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Publication number: 20140238764Abstract: 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: ApplicationFiled: October 1, 2012Publication date: August 28, 2014Inventors: Eiichirou Tsujii, Junji Terada, Atsushi Ueno, Masatoshi Yamada
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Patent number: 8746717Abstract: 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: GrantFiled: December 6, 2010Date of Patent: June 10, 2014Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Eiichirou Tsujii, Kazuhiro Nishida, Atsushi Imai
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Publication number: 20120248717Abstract: 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: ApplicationFiled: December 6, 2010Publication date: October 4, 2012Applicant: Yamaha Hatsudoki Kabushiki KaishaInventors: Eiichirou Tsujii, Kazuhiro Nishida, Atsushi Imai
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Patent number: 8260504Abstract: 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: GrantFiled: December 23, 2009Date of Patent: September 4, 2012Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Eiichirou Tsujii, Yosuke Hirayama, Atsushi Imai, Kazuhiro Nishida, Masayuki Hirano, Toshio Takeuchi
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Publication number: 20110060494Abstract: 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: ApplicationFiled: August 23, 2010Publication date: March 10, 2011Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Eiichirou TSUJII, Kazuhiro NISHIDA, Masayuki HIRANO, Toshio TAKEUCHI
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Patent number: 7878290Abstract: 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 aType: GrantFiled: December 7, 2009Date of Patent: February 1, 2011Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Eiichirou Tsujii, Masayuki Hirano, Takeshi Toyota, Sachiyo Hasegawa, Isao Fujii
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Publication number: 20100168966Abstract: 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: ApplicationFiled: December 23, 2009Publication date: July 1, 2010Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Eiichirou TSUJII, Yosuke HIRAYAMA, Atsushi IMAI, Kazuhiro NISHIDA, Masayuki HIRANO, Toshio TAKEUCHI
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Publication number: 20100147615Abstract: 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 aType: ApplicationFiled: December 7, 2009Publication date: June 17, 2010Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Eiichirou TSUJII, Masayuki HIRANO, Takeshi TOYOTA, Sachiyo HASEGAWA, Isao FUJII
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Patent number: 7497294Abstract: 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: GrantFiled: December 27, 2005Date of Patent: March 3, 2009Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Eiichirou Tsujii, Hitoshi Watanabe, Hiroshi Kitagawa
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Publication number: 20060151225Abstract: 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: ApplicationFiled: December 27, 2005Publication date: July 13, 2006Inventors: Eiichirou Tsujii, Hitoshi Watanabe, Hiroshi Kitagawa
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Patent number: 5984059Abstract: 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: GrantFiled: August 6, 1997Date of Patent: November 16, 1999Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Makoto Kurachi, Mineo Yamamoto, Eiichirou Tsujii