Patents by Inventor Yuzuru Ishikawa
Yuzuru Ishikawa 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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Publication number: 20240264546Abstract: The present invention provides a ferrite particle containing: a ferrite particle body having a spinel crystal structure belonging to a space group Fd-3m and having a spinel composition represented by the following formula (1); and a coating layer having a spinel crystal structure belonging to the space group Fd-3m and coating a surface of the ferrite particle body, in which the coating layer is a layer obtained by subjecting the ferrite represented by the following formula (1) to a heat treatment, and a content ratio of the coating layer in the ferrite particle obtained by subjecting a powder X-ray diffraction pattern to Rietveld analysis is 5 mass % or more and 35 mass % or less, and the ferrite particle satisfies a specific formula (2). The present invention also provides a carrier for an electrophotographic developer.Type: ApplicationFiled: May 27, 2022Publication date: August 8, 2024Applicant: POWDERTECH CO., LTD.Inventors: Yuzuru YAMASAKI, Makoto ISHIKAWA, Tetsuya UEMURA
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Publication number: 20240254004Abstract: A ferrite particle having a spinel crystal structure belonging to a space group Fd-3m and having a ferrite composition represented by a specific formula, a carrier for an electrophotographic developer including the ferrite particle and a resin coating layer configured to coat a surface of the ferrite particle, an electrophotographic developer including the carrier for an electrophotographic developer and a toner, and a ferrite particle production method for producing the ferrite particle.Type: ApplicationFiled: May 27, 2022Publication date: August 1, 2024Applicant: POWDERTECH CO., LTD.Inventors: Yuzuru YAMASAKI, Makoto ISHIKAWA, Tetsuya UEMURA
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Patent number: 10780937Abstract: A frame structure for a motorcycle includes a main frame for supporting a front structure of the motorcycle, the main frame including a pair of main pipes extending rearward from a head pipe of the front structure; a pivot bracket including a metal plate, the pivot bracket connected to the main frame and including a rear cushion mounting portion and a swing arm mounting portion for swingably mounting a rear cushion and a swing arm. The main frame further includes: a pair of support pipes extending rearward from the head pipe for supporting the front structure; and a connecting portion jointly connected at a rear end of the pair of main pipes and the pair of support pipes for connecting to the pivot bracket. The rear cushion mounting portion is positioned forward of the connecting portion of the main frame when viewed from a side view of the motorcycle.Type: GrantFiled: February 25, 2016Date of Patent: September 22, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Tawatchai Aydoung, Shohei Takiguchi, Kazuki Yamagishi, Kenjiro Iwasaki, Satoru Ikami, Hisayoshi Fujita, Atsushi Takasaki, Yuzuru Ishikawa
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Publication number: 20190047655Abstract: A frame structure for a motorcycle includes a main frame for supporting a front structure of the motorcycle, the main frame including a pair of main pipes extending rearward from a head pipe of the front structure; a pivot bracket including a metal plate, the pivot bracket connected to the main frame and including a rear cushion mounting portion and a swing arm mounting portion for swingably mounting a rear cushion and a swing arm. The main frame further includes: a pair of support pipes extending rearward from the head pipe for supporting the front structure; and a connecting portion jointly connected at a rear end of the pair of main pipes and the pair of support pipes for connecting to the pivot bracket. The rear cushion mounting portion is positioned forward of the connecting portion of the main frame when viewed from a side view of the motorcycle.Type: ApplicationFiled: February 25, 2016Publication date: February 14, 2019Applicant: Honda Motor Co., Ltd.Inventors: Tawatchai AYDOUNG, Shohei TAKIGUCHI, Kazuki YAMAGISHI, Kenjiro IWASAKI, Satoru IKAMI, Hisayoshi FUJITA, Atsushi TAKASAKI, Yuzuru ISHIKAWA
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Patent number: 10071783Abstract: In a saddle-ride type vehicle in which a cylinder includes a cylinder head and a cylinder head cover that covers an upper portion of the cylinder head, a vehicle body frame includes a head cover adjoining portion that adjoins the cylinder head cover. At least a part of the cylinder head cover overlaps the head cover adjoining portion as viewed from a direction along a cylinder axis that is a center axis of the cylinder. The head cover adjoining portion extends rearward such that the cylinder head cover is exposed outside in a side view. The foregoing configuration seeks to affect the ease of mounting and dismounting a saddle-ride vehicle having a power unit with a cylinder arranged upward and the vehicle body frame for supporting the power unit by reducing the left-right width of a vehicle body frame while allowing a cylinder head cover to be attachable and detachable.Type: GrantFiled: August 17, 2016Date of Patent: September 11, 2018Assignee: Honda Motor Co., Ltd.Inventors: Akihiro Yamashita, Yuzuru Ishikawa, Toru Ukawa, Daisuke Umikawa
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Patent number: 10041387Abstract: An exhaust device structure for a rocking vehicle includes: a front side exhaust device and a rear side exhaust device muffling exhaust gas noise from an engine; the front side exhaust device and the rear side exhaust device including a front side exhaust pipe and a rear side exhaust pipe having upstream ends connected to exhaust ports of the engine and a first muffler and a second muffler connected to downstream ends of the front side exhaust pipe and the rear side exhaust pipe, the first muffler and the second muffler being disposed on a lower side of the vehicle, the first muffler and the second muffler being arranged to be separated from each other in a forward-rearward direction of the vehicle, and the first muffler and the second muffler being arranged so as to be separated from each other in a left-right direction with respect to a vehicle center.Type: GrantFiled: December 21, 2016Date of Patent: August 7, 2018Assignee: HONDA MOTOR CO., LTD.Inventors: Masato Nakata, Yuzuru Ishikawa, Toru Ukawa
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Patent number: 9855989Abstract: A saddle type vehicle wherein restrictions in the weight and the layout are reduced for slimmer and lighter vehicle. Pivot plates are provided as separate bodies from seat rails. An upper end of a shock absorber is received by a cross member located between left and right seat rails. The cross member is a separate body from the seat rails. Both ends of the cross member are supported by recesses provided in the left and right seat rails at inner sides of the seat rails so as to face each other. The cross member is fastened to the seat rails by cross member fastening members. The seat rail is attached to a main frame at its one front-side end and to the pivot plate at its other front-side end. The main frame and the seat rail are fastened to each other in the vertical direction by a first fastening member.Type: GrantFiled: March 23, 2015Date of Patent: January 2, 2018Assignee: HONDA MOTOR CO., LTD.Inventors: Jun Hariu, Daisuke Umikawa, Akihiro Yamashita, Yuzuru Ishikawa, Shunichi Nakajima
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Patent number: 9739245Abstract: A resonator structure of a saddle-ride vehicle includes a head box that includes a head pipe defining a handlebar steering axis and that forms an intake passage through which air is guided from a front of the vehicle into an inside of the vehicle when the vehicle is traveling, an air cleaner box that is connected to the head box and allows the air guided through the intake passage to be taken into a power unit of the vehicle, and a resonator that forms a resonator chamber configured to reduce an air intake noise. The resonator chamber is formed continuous to the intake passage inside the head box.Type: GrantFiled: August 17, 2016Date of Patent: August 22, 2017Assignee: Honda Motor Co., Ltd.Inventors: Akihiro Yamashita, Yuzuru Ishikawa
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Publication number: 20170183994Abstract: An exhaust device structure for a rocking vehicle includes: a front side exhaust device and a rear side exhaust device muffling exhaust gas noise from an engine; the front side exhaust device and the rear side exhaust device including a front side exhaust pipe and a rear side exhaust pipe having upstream ends connected to exhaust ports of the engine and a first muffler and a second muffler connected to downstream ends of the front side exhaust pipe and the rear side exhaust pipe, the first muffler and the second muffler being disposed on a lower side of the vehicle, the first muffler and the second muffler being arranged to be separated from each other in a forward-rearward direction of the vehicle, and the first muffler and the second muffler being arranged so as to be separated from each other in a left-right direction with respect to a vehicle center.Type: ApplicationFiled: December 21, 2016Publication date: June 29, 2017Applicant: HONDA MOTOR CO., LTD.Inventors: Masato NAKATA, Yuzuru ISHIKAWA, Toru UKAWA
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Publication number: 20170088226Abstract: In a saddle-ride type vehicle in which a cylinder includes a cylinder head and a cylinder head cover that covers an upper portion of the cylinder head, a vehicle body frame includes a head cover adjoining portion that adjoins the cylinder head cover. At least a part of the cylinder head cover overlaps the head cover adjoining portion as viewed from a direction along a cylinder axis that is a center axis of the cylinder. The head cover adjoining portion extends rearward such that the cylinder head cover is exposed outside in a side view. The foregoing configuration seeks to affect the ease of mounting and dismounting a saddle-ride vehicle having a power unit with a cylinder arranged upward and the vehicle body frame for supporting the power unit by reducing the left-right width of a vehicle body frame while allowing a cylinder head cover to be attachable and detachable.Type: ApplicationFiled: August 17, 2016Publication date: March 30, 2017Inventors: Akihiro YAMASHITA, Yuzuru ISHIKAWA, Toru UKAWA, Daisuke UMIKAWA
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Publication number: 20170089308Abstract: A resonator structure of a saddle-ride vehicle includes a head box that includes a head pipe defining a handlebar steering axis and that forms an intake passage through which air is guided from a front of the vehicle into an inside of the vehicle when the vehicle is traveling, an air cleaner box that is connected to the head box and allows the air guided through the intake passage to be taken into a power unit of the vehicle, and a resonator that forms a resonator chamber configured to reduce an air intake noise. The resonator chamber is formed continuous to the intake passage inside the head box.Type: ApplicationFiled: August 17, 2016Publication date: March 30, 2017Inventors: Akihiro YAMASHITA, Yuzuru ISHIKAWA
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Publication number: 20150274251Abstract: A saddle type vehicle wherein restrictions in the weight and the layout are reduced for slimmer and lighter vehicle. Pivot plates are provided as separate bodies from seat rails. An upper end of a shock absorber is received by a cross member located between left and right seat rails. The cross member is a separate body from the seat rails. Both ends of the cross member are supported by recesses provided in the left and right seat rails at inner sides of the seat rails so as to face each other. The cross member is fastened to the seat rails by cross member fastening members. The seat rail is attached to a main frame at its one front-side end and to the pivot plate at its other front-side end. The main frame and the seat rail are fastened to each other in the vertical direction by a first fastening member.Type: ApplicationFiled: March 23, 2015Publication date: October 1, 2015Applicant: HONDA MOTOR CO., LTD.Inventors: Jun HARIU, Daisuke UMIKAWA, Akihiro YAMASHITA, Yuzuru ISHIKAWA, Shunichi NAKAJIMA
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Patent number: 9022163Abstract: A gear shift control device of a saddle ride type vehicle includes an operation pedal; a movable part which includes a movable member interlocking with and connected to the operation pedal and which has at least one of a click mechanism configured to give click feeling to an operation of the operation pedal, a stopper mechanism configured to restrict a turning operation range of the operation pedal, and a return mechanism configured to apply a spring force in a return direction to the operation pedal; and a detector which detects a gear shift operation performed by using the operation pedal, the gear shift control device configured to make a transmission perform a gear shift on the basis of a detection result of the detector.Type: GrantFiled: August 27, 2012Date of Patent: May 5, 2015Assignee: Honda Motor Co., Ltd.Inventors: Kenta Nakamura, Yuzuru Ishikawa, Shinichi Karube, Taichi Mori, Ippei Kawamura
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Publication number: 20130055841Abstract: A gear shift control device of a saddle ride type vehicle includes an operation pedal; a movable part which includes a movable member interlocking with and connected to the operation pedal and which has at least one of a click mechanism configured to give click feeling to an operation of the operation pedal, a stopper mechanism configured to restrict a turning operation range of the operation pedal, and a return mechanism configured to apply a spring force in a return direction to the operation pedal; and a detector which detects a gear shift operation performed by using the operation pedal, the gear shift control device configured to make a transmission perform a gear shift on the basis of a detection result of the detector.Type: ApplicationFiled: August 27, 2012Publication date: March 7, 2013Applicant: HONDA MOTOR CO., LTDInventors: Kenta Nakamura, Yuzuru Ishikawa, Shinichi Karube, Taichi Mori, Ippei Kawamura
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Patent number: 8016308Abstract: A rear fender of a motorcycle includes a hollow stay portion which extends in the vehicle rearward and downward direction from a base portion thereof arranged in the inside of a rear portion of a seat rail, the stay portion is configured to be dividable, and lines for electric components are encased in a hollow portion of the stay portion.Type: GrantFiled: July 1, 2008Date of Patent: September 13, 2011Assignee: Honda Motor Co., Ltd.Inventors: Yuzuru Ishikawa, Gen Tanabe
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Patent number: 7992885Abstract: To operate a pillion step in one action. The pillion step is formed in a generally L shape and includes an arm portion and a foot rest portion. One end of the arm portion is pivotably secured through an oblique pivot shaft to a side face of a seat rail located under a rider seat and is pivotally moved around the oblique pivot shaft. When the pillion step is to be retracted and is pivotally moved backward, the foot rest portion moves into a gap between the rider seat and a pillion seat and its tip end is received within a grip space formed in a grip.Type: GrantFiled: March 26, 2008Date of Patent: August 9, 2011Assignee: Honda Motor Co., Ltd.Inventors: Yuzuru Ishikawa, Kenji Morita
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Patent number: 7905320Abstract: An exhaust valve and a catalyst can be easily disposed of in a simple manner. The interior of a triangular muffler is partitioned into three expansion chambers. A manifold pipe is connected to the second, middle expansion chamber sideways from a lower portion thereof and is accommodated therein so as to face upward. A catalyst is accommodated in the interior of the manifold pipe. Exhaust gas flowing out from an open end of the manifold pipe expands into the second chamber. A short-circuiting aperture is formed in a second separator and is opened and closed with an exhaust valve installed within the third chamber. The exhaust valve is normally closed by a spring. When the exhaust pressure reaches a predetermined magnitude, the exhaust valve opens automatically, allowing the exhaust gas to flow out into the third chamber through the short-circuiting aperture, thereby controlling the exhaust pressure.Type: GrantFiled: March 26, 2008Date of Patent: March 15, 2011Assignee: Honda Motor Co., Ltd.Inventors: Yuzuru Ishikawa, Mitsunobu Imada
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Patent number: 7905506Abstract: In the step holder mounting structure of a motorcycle which mounts step holders for supporting steps of a rider on a seat rail extending rearwardly from a main frame, the step holders are fastened to the seat rail from the inside of a vehicle.Type: GrantFiled: July 1, 2008Date of Patent: March 15, 2011Assignee: Honda Motor Co., Ltd.Inventors: Yuzuru Ishikawa, Keisuke Nakata
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Patent number: 7883101Abstract: In a motorcycle, a head pipe is provided with one main frame part that extends rearwardly from the head pipe and a rear frame that extends substantially downwardly from the rear of the main frame part. A pivot is pierced in a pivot support part provided to the rear frame with a swing arm being attached to the pivot so that the swing arm can be vertically swung and a rear shock absorber unit is positioned between the swing arm and the side of the body frame. The main frame is cast in an aluminum alloy and the rear frame on the upside and the downside of the pivot supporting part projects on both sides of a vehicle from the pivot supporting part to attach right and left brackets for supporting both ends of the pivot.Type: GrantFiled: March 2, 2006Date of Patent: February 8, 2011Assignee: Honda Motor Co., Ltd.Inventors: Masayuki Taniguchi, Yuzuru Ishikawa, Kenji Hasegawa, Koji Shimokawa, Shunichi Nakajima, Naoshi Iizuka
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Patent number: 7870924Abstract: A saddle-riding type vehicle includes a vehicle body, a pivot frame that supports a swing arm for rear wheel suspension, and a rear master cylinder disposed rearwardly of the pivot frame. A reservoir tank supplies hydraulic fluid to the rear master cylinder, and the reservoir tank is disposed between the pivot frame and the rear master cylinder. A portion of the swing arm, adjacent to the reservoir tank, is configured with a concave recess formed therein extending inwardly towards a longitudinal center line of the vehicle body. The reservoir tank is situated closer to a vehicle body inner side, and is deeper in the recess than the rear master cylinder.Type: GrantFiled: August 14, 2008Date of Patent: January 18, 2011Assignee: Honda Motor Co., Ltd.Inventors: Masayuki Fujita, Yuzuru Ishikawa, Shinichi Kuwahara