Patents by Inventor Atsuhiro Emura

Atsuhiro Emura 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).

  • Publication number: 20140290412
    Abstract: A bicycle gear changing apparatus is basically provided with an upshifting input, a downshifting input and a controller. The controller is operatively coupled to the upshifting input and the downshifting input to receive upshift signals and downshift signals. The controller outputs control signals to control a first gear changing device and a second gear changing device in accordance with a synchro-downshift route and a synchro-upshift route that is different from the synchro-downshift route, in response to receiving the upshift signals and the downshift signals.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 2, 2014
    Applicant: Shimano Inc.
    Inventors: Atsuhiro EMURA, Nobukatsu HARA, Hideki IKEMOTO, Mao KURODA
  • Publication number: 20140287856
    Abstract: An electric front derailleur is provided with a base member, a movable member, a driving unit and a controller. The base member includes a bicycle mounting portion. The movable member moves with respect to the base member. The controller selectively operates the driving unit with one of a first mode which moves the movable member between a first end position and a second end position, and a second mode which moves the movable member between a third end position and a fourth end position. The controller operates the driving unit to selectively position the movable member at first, second and third stop positions while in the first mode. At least one of the third and fourth end positions differs from the first and second end positions. A first distance between the first and second stop positions differs from a second distance between the second and third stop positions.
    Type: Application
    Filed: March 25, 2013
    Publication date: September 25, 2014
    Applicant: Shimano Inc.
    Inventors: Kazuya KUWAYAMA, Atsuhiro EMURA
  • Publication number: 20140243126
    Abstract: A bicycle front derailleur includes abase member configured to be attached to a bicycle frame, a chain guide configured to engage a chain, a connecting structure that connects the chain guide to the base member such that the chain guide can move relative to the base member, and an attachment structure detachably attaching the chain guide to the connecting structure and/or the connecting structure to the base member.
    Type: Application
    Filed: February 28, 2013
    Publication date: August 28, 2014
    Applicant: SHIMANO INC.
    Inventors: Kazuya Kuwayama, Atsuhiro Emura
  • Patent number: 8808123
    Abstract: A bicycle front derailleur that includes a chain guide configured to engage a bicycle chain and a mounting member operatively coupled to the chain guide. The mounting member includes a frame support structure that includes a contact member that is configured to contact the frame of the bicycle, and a support member mounted to the mounting member. The contact member is supported by the support member.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: August 19, 2014
    Assignee: Shimano Inc.
    Inventors: Kenkichi Inoue, Atsuhiro Emura, Kazuya Kuwayama
  • Publication number: 20140213397
    Abstract: A rear derailleur is basically provided with a base member, a movable member, a chain guide, a friction element, a one-way clutch and an electric actuator. The base member is configured to be mounted to a bicycle. The movable member is movably coupled to the base member. The chain guide is coupled to the movable member to rotate around a rotational axis with respect to the movable member. The friction element is operatively arranged between the movable member and the chain guide to frictionally provide rotational resistance in a first rotational direction of the chain guide. The one-way clutch is operatively disposed between movable member and the chain guide to engage the friction element as the chain guide rotates in the first rotational direction. The electric actuator is operatively coupled to the one-way clutch to control the one-way clutch between a clutch-on mode and a clutch-off mode.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Applicant: SHIMANO INC.
    Inventors: Sota YAMAGUCHI, Atsuhiro EMURA, Tsuyoshi MIYAKE, Ryuichiro TAKAMOTO, Yoshiyuki KASAI, Mao KURODA
  • Patent number: 8746106
    Abstract: A bicycle operating device operates a bicycle component by moving a winding member that moves a take-up member relative to a fixed member in first and second directions. A positioning member is movably arranged with respect to the fixed member between a non-holding position and a holding position to selectively engage a positioning ratchet that is fixed to the take-up member. In the holding position, the positioning member prevents the take-up member from moving in the second direction by selectively engaging one of at least three engaging portions of the positioning ratchet. A preventing member is movably arranged with respect to the positioning ratchet such that the preventing member prevents the positioning member from engaging an intermediate engaging portion of the positioning ratchet while the winding member moves the take-up member in the first direction.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: June 10, 2014
    Assignee: Shimano Inc.
    Inventors: Yoshimitsu Miki, Atsuhiro Emura, Kazutaka Fukao, Kazunori Ookubo
  • Publication number: 20140155204
    Abstract: A front derailleur unit basically includes a fixed member and a movable member. The fixed member is configured to be releasably attached to a plurality of different type mounting units. The different type mounting units is detachably attached to a bicycle frame. The movable member is movably supported to the fixed member to move with respect to the fixed member.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: SHIMANO INC.
    Inventors: Atsuhiro EMURA, Kazuya KUWAYAMA, Kenkichi INOUE
  • Publication number: 20140155205
    Abstract: A front derailleur basically includes a fixed member, a main body, a movable member and a support member. The fixing member is configured to be fixed to a bicycle frame. The main body is attached to the fixing member. The movable member is movably supported to the main body with respect to the fixing member. The support member is movably attached to one of the fixing member and the main body. The support member including an operated portion selectively operated by an operating element and positioned between the fixing member and the main body.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: SHIMANO INC.
    Inventors: Kazuya KUWAYAMA, Atsuhiro EMURA, Kenkichi INOUE
  • Publication number: 20140148287
    Abstract: A front derailleur basically includes a fixed member, a movable member, a driven link and a first link. The fixing member is configured to be fixed to a bicycle frame. The movable member is movably supported with respect to the fixed member. The driven link is operatively coupled to the movable member. The first link movably connects the movable member to the fixed member, and is adjustably coupled to the driven link in a fixed position by a fixing structure to establish a fixed rest position of the movable member with respect to the fixed member.
    Type: Application
    Filed: January 14, 2014
    Publication date: May 29, 2014
    Applicant: Shimano Inc.
    Inventors: Hiroshi TACHIBANA, Yuuta MIZUTANI, Keijiro NISHI, Kazuya KUWAYAMA, Atsuhiro EMURA, Kenkichi INOUE
  • Patent number: 8734280
    Abstract: An inner link plate is provided for a chain. The inner link plate has a longitudinal centerline, an inside surface arranged to face another inner link plate when the chain is assembled, an outside surface opposite to the inside surface, and an outer peripheral edge disposed between the inside and outside surfaces. The bicycle inner link plate basically has a first end portion, a second end portion and a connecting portion. The first and second end portions are each provided with a connecting opening. The connecting portion includes a recess disposed on the inside surface of the connecting portion. The recess has a maximum longitudinal width on the outer peripheral edge, and a minimum longitudinal width in a region adjacent the longitudinal centerline. The recess at least extends from the outer peripheral edge to the longitudinal centerline.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: May 27, 2014
    Assignee: Shimano Inc.
    Inventors: Toshinari Oishi, Tsuyoshi Fukumori, Atsuhiro Emura
  • Publication number: 20140128190
    Abstract: An electric front derailleur includes a base member, a chain guide, a first link member, a second link member and an electric driving unit. The base member includes a mounting portion to be operatively mounted to a bicycle frame. The chain guide is movable with respect to the base member. The first link member movably connects the chain guide to the base member. The first link member is at least partially aligned with the chain guide in a lateral direction with the electric front derailleur in an installed position. The second link member movably connects the chain guide to the base member. The second link member is at least partially aligned with the chain guide in the lateral direction with the electric front derailleur in the installed position. The electric driving unit is operatively coupled to the chain guide to move the chain guide with respect to the base member.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 8, 2014
    Applicant: SHIMANO INC.
    Inventors: Atsuhiro EMURA, Kazuya KUWAYAMA
  • Publication number: 20140128189
    Abstract: A bicycle derailleur is basically provided with a base member, a movable member and a connecting structure. The base member includes a bicycle mounting portion. The movable member is movable with respect to the base member between a first position and a second position that is farther than the first position from the base member. The connecting structure movably connects the movable member to the base member. The connecting structure moves the movable member with an actuation ratio that descends and then ascends as the movable member moves from the first position towards the second position.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 8, 2014
    Applicant: SHIMANO INC.
    Inventors: Kazuya KUWAYAMA, Atsuhiro EMURA, Kenkichi INOUE
  • Patent number: 8678963
    Abstract: A bicycle front derailleur is basically provided with a base member, a movable member and a biasing arrangement. The biasing arrangement is operatively disposed between the base member and the movable member such that a biasing force of the biasing arrangement is smaller during an early range of a movement range of the movable member as the movable member moves from a first position to a second position. The biasing arrangement includes a first biasing member, a second biasing member and a pre-load body. The first and second biasing members selectively bias the movable member. The pre-load body maintains the second biasing member in a loaded state such that the second biasing member applies the second biasing force only after the movable member has partially moved from the first position towards the second position.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: March 25, 2014
    Assignee: Shimano Inc.
    Inventors: Kazuya Kuwayama, Kenkichi Inoue, Atsuhiro Emura
  • Publication number: 20130233112
    Abstract: A bicycle operating device operates a bicycle component by moving a winding member that moves a take-up member relative to a fixed member in first and second directions. A positioning member is movably arranged with respect to the fixed member between a non-holding position and a holding position to selectively engage a positioning ratchet that is fixed to the take-up member. In the holding position, the positioning member prevents the take-up member from moving in the second direction by selectively engaging one of at least three engaging portions of the positioning ratchet. A preventing member is movably arranged with respect to the positioning ratchet such that the preventing member prevents the positioning member from engaging an intermediate engaging portion of the positioning ratchet while the winding member moves the take-up member in the first direction.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 12, 2013
    Applicant: SHIMANO INC.
    Inventors: Yoshimitsu MIKI, Atsuhiro EMURA, Kazutaka FUKAO, Kazunori OOKUBO
  • Patent number: 8491428
    Abstract: A bicycle structure is provided with a crankset and a front derailleur. The crankset includes a plurality of chain rings, with a largest chain ring of the plurality of chain rings having a plurality of teeth with teeth bottoms interposed between adjacent ones of the teeth. The front derailleur includes a chain guide having a chain guide slot partially defined by a first chain engagement surface with a protruding part that protrudes outwardly from the first chain engagement surface into the chain guide slot. The protruding part is located away from the teeth bottoms of the largest chain ring in a radial outside direction of the largest chain ring by a prescribed distance in a range from eight millimeters to sixteen millimeters.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: July 23, 2013
    Assignee: Shimano Inc.
    Inventors: Atsuhiro Emura, Yoshiaki Nankou
  • Patent number: 8485060
    Abstract: A bicycle shift operating device is provided for operating a shifting device to move a chain between two gears using a guiding portion. The bicycle shift operating device has an operating member, a moving member and a positioning mechanism. The positioning mechanism selectively maintains the moving member in a first position that locates the guiding portion to a first guiding position corresponding to the first gear, a second position that locates the guiding portion to a second guiding position corresponding to the second gear, and a third position that locates the guiding portion to a third guiding position corresponding to the second gear. The third guiding position is farther from the first guiding position than the second guiding position. The positioning mechanism moves the moving member from the first position to the second position in response to a single operation of the operating member.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: July 16, 2013
    Assignee: Shimano Inc.
    Inventors: Atsuhiro Emura, Yoshimitsu Miki
  • Publication number: 20130090196
    Abstract: A bicycle derailleur basically includes a base member, a movable member, a chain guide, a friction element and a motor. The base member is configured to be mounted to a bicycle. The movable member is movably coupled to the base member. The chain guide is coupled to the movable member to rotate around a rotational axis with respect to the movable member. The friction element is operatively arranged between the movable member and the chain guide to frictionally provide rotational resistance in a first rotational direction of the chain guide. The motor is operatively coupled to the movable member to move the movable member with respect to the base member.
    Type: Application
    Filed: October 4, 2012
    Publication date: April 11, 2013
    Applicant: SHIMANO INC.
    Inventors: Sota YAMAGUCHI, Atsuhiro EMURA
  • Publication number: 20130085026
    Abstract: A front derailleur comprises a base member structured to be attached to a bicycle frame member, a chain guide operatively connected to the base member, and an actuation mechanism coupled to the base member and to the chain guide for moving the chain guide relative to the base member between a first position corresponding to a location for positioning a chain on a first sprocket and a second position corresponding to a location for positioning the chain on a second sprocket. The actuation mechanism is configured so that an actuation ratio of the derailleur when the chain guide is located in the first position is greater than or equal to 1.5 times the actuation ratio when the chain guide is located in the second position.
    Type: Application
    Filed: October 3, 2011
    Publication date: April 4, 2013
    Applicant: SHIMANO, INC.
    Inventors: Kazuya Kuwayama, Atsuhiro Emura, Kenkichi Inoue
  • Publication number: 20130085024
    Abstract: A bicycle front derailleur that includes a chain guide configured to engage a bicycle chain and a mounting member operatively coupled to the chain guide. The mounting member includes a frame support structure that includes a contact member that is configured to contact the frame of the bicycle, and a support member mounted to the mounting member. The contact member is supported by the support member.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 4, 2013
    Applicant: SHIMANO, INC.
    Inventors: Kenkichi INOUE, Atsuhiro EMURA, Kazuya KUWAYAMA
  • Publication number: 20130085025
    Abstract: A bicycle front derailleur that includes a main body and a chain guide operatively coupled to the main body. The chain guide includes a first plate, a second plate, and a contact member affixed to the first plate. The contact member includes a flexible portion that is adapted to flex when contacted by a chain running through the chain guide.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 4, 2013
    Applicant: SHIMANO, INC.
    Inventors: Kenkichi INOUE, Atsuhiro EMURA, Kazuya KUWAYAMA