Patents by Inventor Akira Tsumiyama
Akira Tsumiyama 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: 8695454Abstract: A bicycle operating device is provided with a first operating unit, a second operating unit and a connecting member. The first operating unit includes a clamp portion for attaching the bicycle operating device to a bicycle and a first operating member. The second operating unit includes a second operating member. The connecting member includes first and second attachment portions. The first attachment portion is detachably attached to the first operating unit by a first adjustable connection. The second attachment portion is detachably attached to the second operating unit by a second adjustable connection. The first adjustable connection changes a relative position of the connecting member with respect to the clamp portion in a first direction. The second adjustable connection changes a relative position of the connecting member with respect to the second operating unit in a second direction that is different from the first direction.Type: GrantFiled: April 18, 2011Date of Patent: April 15, 2014Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 8549956Abstract: A bicycle control device is basically provided with a base member, a shift control unit, a brake lever, a shift operating lever and a lever adjustment mechanism. The shift control unit is mounted to the base member. The brake lever is movably mounted relative to the base member. The shift operating lever is operatively coupled to the shift control unit to operate the shift control unit when the shift operating lever is moved from a rest position along a shift operating path. The shift operating lever is movable from the rest position along a non-shift movement path independently of the brake lever. The lever adjustment mechanism is operatively coupled to the shift operating lever to change a location of the rest position of the shift operating lever along the non-shift movement path.Type: GrantFiled: June 25, 2007Date of Patent: October 8, 2013Assignee: Shimano Inc.Inventors: Yoshimitsu Miki, Hisayuki Sato, Etsuyoshi Watarai, Akira Tsumiyama
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Patent number: 8413543Abstract: A bicycle operating unit connector is provided with a first attachment portion and a second attachment portion. The first attachment portion includes a curved mounting surface with an opening that is detachably attached to an outwardly facing surface of a band part of a clamp portion of a brake operating unit by an adjustable connection for changing a relative position of the connector with respect to the clamp portion of the brake operating unit. The second attachment portion extends from the first attachment portion. The second attachment portion includes a hole that is configured to be detachably attached to a shift operating unit.Type: GrantFiled: November 30, 2010Date of Patent: April 9, 2013Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 8201476Abstract: A bicycle operating device is provided with a first operating unit, a second operating unit and a connecting member. The first operating unit includes a clamp portion for attaching the bicycle operating device to a bicycle and a first operating member. The second operating unit includes a housing and a second operating member. The connecting member includes a first attachment portion and a second attachment portion, with the first attachment portion being detachably attached to an outwardly facing surface of the clamp portion of the first operating unit by an adjustable connection for changing a relative position of the connecting member with respect to the clamp portion. The second attachment portion is detachably attached to the second operating unit.Type: GrantFiled: December 9, 2008Date of Patent: June 19, 2012Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 8181553Abstract: A position control mechanism is provided for a bicycle control device that has a shifting unit. The position control mechanism has an operating member that is configured to operate a positioning member that moves through two of a plurality of predetermined shift positions during a single progressive movement of the operating member. The operating member is configured in the preferred embodiment to operate both a hydraulic braking unit and the shifting unit.Type: GrantFiled: October 25, 2004Date of Patent: May 22, 2012Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Publication number: 20110192249Abstract: A bicycle operating device is provided with a first operating unit, a second operating unit and a connecting member. The first operating unit includes a clamp portion for attaching the bicycle operating device to a bicycle and a first operating member. The second operating unit includes a second operating member. The connecting member includes first and second attachment portions. The first attachment portion is detachably attached to the first operating unit by a first adjustable connection. The second attachment portion is detachably attached to the second operating unit by a second adjustable connection. The first adjustable connection changes a relative position of the connecting member with respect to the clamp portion in a first direction. The second adjustable connection changes a relative position of the connecting member with respect to the second operating unit in a second direction that is different from the first direction.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: SHIMANO INC.Inventor: Akira TSUMIYAMA
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Publication number: 20110070017Abstract: A bicycle operating unit connector is provided with a first attachment portion and a second attachment portion. The first attachment portion includes a curved mounting surface with an opening that is detachably attached to an outwardly facing surface of a band part of a clamp portion of a brake operating unit by an adjustable connection for changing a relative position of the connector with respect to the clamp portion of the brake operating unit. The second attachment portion extends from the first attachment portion. The second attachment portion includes a hole that is configured to be detachably attached to a shift operating unit.Type: ApplicationFiled: November 30, 2010Publication date: March 24, 2011Applicant: SHIMANO INC.Inventor: Akira TSUMIYAMA
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Patent number: 7802489Abstract: A bicycle control device is configured with an operating member that selectively controls a braking unit and a shifting such that shifting and braking can be easily performed while braking. The operating member has a user engagement part and a wire connecting portion with a support structure pivotally coupled to the user engagement part and a wire attachment member movably coupled to the support structure by a universal coupling. Also the operating member can perform a braking operation without movement of the main parts of the shifting unit. The shifting unit is movably disposed around a center shifting axis to provide a compact structure. The shifting unit has a position control mechanism that is configured to operate a positioning member that moves through two of a plurality of predetermined shift positions during a single progressive movement of the operating member.Type: GrantFiled: June 1, 2005Date of Patent: September 28, 2010Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Publication number: 20100139442Abstract: A bicycle operating device is provided with a first operating unit, a second operating unit and a connecting member. The first operating unit includes a clamp portion for attaching the bicycle operating device to a bicycle and a first operating member. The second operating unit includes a housing and a second operating member. The connecting member includes a first attachment portion and a second attachment portion, with the first attachment portion being detachably attached to an outwardly facing surface of the clamp portion of the first operating unit by an adjustable connection for changing a relative position of the connecting member with respect to the clamp portion. The second attachment portion is detachably attached to the second operating unit.Type: ApplicationFiled: December 9, 2008Publication date: June 10, 2010Applicant: SHIMANO INC.Inventor: Akira TSUMIYAMA
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Patent number: 7650813Abstract: A position control mechanism is provided for a bicycle control device that has a shifting unit. The position control mechanism has an operating member that is configured to operate a positioning member that moves through two of a plurality of predetermined shift positions during a single progressive movement of the operating member. The operating member is configured in the preferred embodiment to operate both a hydraulic braking unit and the shifting unit.Type: GrantFiled: May 19, 2005Date of Patent: January 26, 2010Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 7526979Abstract: A bicycle shift position control mechanism is configured to provide a bicycle shifting unit with multiple gear shifting in a single upshift operation or a single downshift operation. The shift position control mechanism that has a wire take up member, a positioning member, a first position maintaining member and a second position maintaining member. The positioning member rotates with the wire take up member between one of a plurality of predetermined shift positions. The first position maintaining member selectively moves between a first engagement position that holds the positioning member in one of the predetermined shift positions and a first disengagement position that releases the positioning member for rotational movement. The second position maintaining member selectively moes between a second engagement position that holds the positioning member in one of the predetermined shift positions and a second disengagement position that releases the positioning member for rotational movement.Type: GrantFiled: July 19, 2005Date of Patent: May 5, 2009Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 7509888Abstract: A hydraulic gear shift mechanism for a bicycle having a positioning mechanism for controlling the motion of the piston of a master cylinder assembly is disclosed, wherein the master cylinder assembly is in communication with a slave cylinder for operation of a derailleur. The positioning mechanism preferably includes a pivot shaft spaced apart from the handlebar, a rotating member rotatable about the pivot shaft, a push mechanism for rotating the rotating member in a first direction and a return mechanism for rotating the rotating member in a second direction. In a more preferred embodiment of the invention, an adjuster piston is threadingly engaged with the master cylinder assembly for adjusting the initial position of the slave cylinder.Type: GrantFiled: September 22, 2006Date of Patent: March 31, 2009Assignee: Shimano Inc.Inventors: Tadashi Ichida, Akira Tsumiyama
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Publication number: 20080314191Abstract: A bicycle control device is basically provided with a base member, a shift control unit, a brake lever, a shift operating lever and a lever adjustment mechanism. The shift control unit is mounted to the base member. The brake lever is movably mounted relative to the base member. The shift operating lever is operatively coupled to the shift control unit to operate the shift control unit when the shift operating lever is moved from a rest position along a shift operating path. The shift operating lever is movable from the rest position along a non-shift movement path independently of the brake lever. The lever adjustment mechanism is operatively coupled to the shift operating lever to change a location of the rest position of the shift operating lever along the non-shift movement path.Type: ApplicationFiled: June 25, 2007Publication date: December 25, 2008Applicant: SHIMANO INC.Inventors: Yoshimitsu MIKI, Hisayuki SATO, Etsuyoshi WATARAI, Akira TSUMIYAMA
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Patent number: 7392723Abstract: A bicycle shift position control mechanism is configured to provide a bicycle shifting unit with multiple gear shifting in a single upshift operation or a single downshift operation. The shift position control mechanism that has a wire take up member, a positioning member, a first position maintaining member and a second position maintaining member. The positioning member rotates with the wire take up member between one of a plurality of predetermined shift positions. The first position maintaining member selectively moves between a first engagement position that holds the positioning member in one of the predetermined shift positions and a first disengagement position that releases the positioning member for rotational movement. The second position maintaining member selectively moves between a second engagement position that holds the positioning member in one of the predetermined shift positions and a second disengagement position that releases the positioning member for rotational movement.Type: GrantFiled: September 7, 2005Date of Patent: July 1, 2008Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 7267026Abstract: A bicycle control device is disclosed having a control lever that is operable in a first direction to operate the brake control mechanism, a second direction to operate the shift control mechanism in the pulling direction and a third direction to operate the shift control mechanism in the release direction. In a preferred embodiment of the invention, when viewed from the perspective of a rider on the bicycle, the first direction is the direction of movement of the lever toward the handlebar. The second direction is the direction of movement of the control lever downward and the third direction is the direction of movement of the control lever upward. In a more preferred embodiment, the second and third directions are perpendicular to the first direction.Type: GrantFiled: September 2, 2003Date of Patent: September 11, 2007Assignee: Shimano Inc.Inventors: Akira Tsumiyama, Nobukatsu Hara
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Publication number: 20070163378Abstract: A hydraulic gear shift mechanism for a bicycle having a positioning mechanism for controlling the motion of the piston of a master cylinder assembly is disclosed, wherein the master cylinder assembly is in communication with a slave cylinder for operation of a derailleur. The positioning mechanism preferably includes a pivot shaft spaced apart from the handlebar, a rotating member rotatable about the pivot shaft, a push mechanism for rotating the rotating member in a first direction and a return mechanism for rotating the rotating member in a second direction. The push mechanism preferably includes a first latch segment which engages a corresponding push pawl to rotate the rotating member. The return mechanism preferably comprises a second latch segment and a return pawl, the return pawl having a first claw and a second claw which alternately engage the second latch segment.Type: ApplicationFiled: September 22, 2006Publication date: July 19, 2007Applicant: SHIMANO INC.Inventors: Tadashi ICHIDA, Akira TSUMIYAMA
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Patent number: 7228756Abstract: A bicycle control device is provided to control both a derailleur and a brake device. The control device includes a mounting member, a control mechanism, a first lever portion and a second lever portion. The mounting member is coupled to part of the bicycle such as the handlebar. The control mechanism is coupled to the mounting member and is adapted to control braking and shifting. The first and second lever portions are operatively coupled to the control mechanism to perform braking/shifting. The first lever portion is arranged to perform braking and shifting. The second lever portion is arranged to at least perform shifting. The first and second lever portions are arranged to move together at least when operated to perform shifting.Type: GrantFiled: November 25, 2003Date of Patent: June 12, 2007Assignee: Shimano Inc.Inventor: Akira Tsumiyama
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Patent number: 7219574Abstract: A shift control device is described. The shift control device is attachable to the handlebar of a bicycle for controlling the piston of a hydraulic shift mechanism and includes a bracket attachable to the handlebar, a pivot shaft, a rotating member, and a control lever. The pivot shaft is spaced apart from the handlebar and fixedly secured to the bracket. The rotating member is rotatable in a first direction and a second direction about the pivot shaft. The control lever is operatively connected with the rotating member and biased in a neutral position.Type: GrantFiled: March 11, 2005Date of Patent: May 22, 2007Assignee: Shimano Inc.Inventors: Tadashi Ichida, Akira Tsumiyama
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Publication number: 20070068313Abstract: A bicycle shift position control mechanism is configured to provide a bicycle shifting unit with multiple gear shifting in a single upshift operation or a single downshift operation. The shift position control mechanism that has a wire take up member, a positioning member, a first position maintaining member and a second position maintaining member. The positioning member rotates with the wire take up member between one of a plurality of predetermined shift positions. The first position maintaining member selectively moves between a first engagement position that holds the positioning member in one of the predetermined shift positions and a first disengagement position that releases the positioning member for rotational movement. The second position maintaining member selectively moves between a second engagement position that holds the positioning member in one of the predetermined shift positions and a second disengagement position that releases the positioning member for rotational movement.Type: ApplicationFiled: September 7, 2005Publication date: March 29, 2007Applicant: Shimano Inc.Inventor: Akira Tsumiyama
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Publication number: 20070017316Abstract: A bicycle shift position control mechanism is configured to provide a bicycle shifting unit with multiple gear shifting in a single upshift operation or a single downshift operation. The shift position control mechanism that has a wire take up member, a positioning member, a first position maintaining member and a second position maintaining member. The positioning member rotates with the wire take up member between one of a plurality of predetermined shift positions. The first position maintaining member selectively moves between a first engagement position that holds the positioning member in one of the predetermined shift positions and a first disengagement position that releases the positioning member for rotational movement. The second position maintaining member selectively moes between a second engagement position that holds the positioning member in one of the predetermined shift positions and a second disengagement position that releases the positioning member for rotational movement.Type: ApplicationFiled: July 19, 2005Publication date: January 25, 2007Applicant: Shimano Inc.Inventor: Akira Tsumiyama