Patents by Inventor Masayuki Tomizawa
Masayuki Tomizawa 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: 10836410Abstract: A carbody of a railcar includes: an underframe; a first member provided at one of vertical sides of a vertical center of the underframe, supported by the underframe, and absorbing collision energy; a second member provided at the other vertical side of the vertical center of the underframe, supported by the underframe, and contacting an obstacle when the first member is compressed by collision with the obstacle. In a case where the second member receives a reaction force from the obstacle when the first member is compressed by the collision with the obstacle, the second member transfers to the underframe a moment load that is opposite in a rotational direction to a moment load transferred to the underframe by the first member.Type: GrantFiled: May 31, 2016Date of Patent: November 17, 2020Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi Sano, Naoaki Kawakami, Naohiro Yoshida, Shinichiro Hata, Seiichiro Yagi, Masayuki Tomizawa
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Patent number: 10676114Abstract: A collision energy absorbing device of a railcar includes: at least one outside plate constituting an outer tube having an axis extending in a car longitudinal direction; and at least one partition plate extending in the car longitudinal direction in an internal space surrounded by the at least one outside plate, the at least one partition plate fixed to the at least one outside plate and dividing the internal space. An end portion of the partition plate which portion is located at an end in a direction perpendicular to the axis is sandwiched by the at least one outside plate and constitutes a part of the outer tube.Type: GrantFiled: June 7, 2016Date of Patent: June 9, 2020Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi Sano, Naoaki Kawakami, Naohiro Yoshida, Shinichiro Hata, Seiichiro Yagi, Masayuki Tomizawa
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Patent number: 10493999Abstract: A railcar head structure includes: a roof bodyshell positioned above a driver's cab window; and an underframe. The underframe includes: a pair of side sills; and a center sill located between the side sills and extending in a car longitudinal direction. A collision post is erected on a tip end of the center sill. A pillar is provided at the driver's cab window and extends so as to divide the driver's cab window. The pillar includes one end joined to the collision post and the other end joined to the roof bodyshell and couples the roof bodyshell and the collision post to each other.Type: GrantFiled: July 17, 2014Date of Patent: December 3, 2019Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi Sano, Naoaki Kawakami, Naohiro Yoshida, Shinichiro Hata, Seiichiro Yagi, Masayuki Tomizawa
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Patent number: 10493932Abstract: A collision energy absorbing device of a railcar includes: an outside plate constituting an outer tube including an axis extending in a car longitudinal direction; and at least one partition plate extending in the car longitudinal direction in an internal space surrounded by the outside plate, the at least one partition plate fixed to the outside plate and dividing the internal space. An outer shape of the outer tube is a shape that is symmetrical with respect to a virtual horizontal surface including the axis, and the at least one partition plate includes a missing portion in the internal space.Type: GrantFiled: June 7, 2016Date of Patent: December 3, 2019Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi Sano, Naoaki Kawakami, Naohiro Yoshida, Shinichiro Hata, Seiichiro Yagi, Masayuki Tomizawa
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Publication number: 20180222417Abstract: A collision energy absorbing device of a railcar includes: an outside plate constituting an outer tube including an axis extending in a car longitudinal direction; and at least one partition plate extending in the car longitudinal direction in an internal space surrounded by the outside plate, the at least one partition plate fixed to the outside plate and dividing the internal space. An outer shape of the outer tube is a shape that is symmetrical with respect to a virtual horizontal surface including the axis, and the at least one partition plate includes a missing portion in the internal space.Type: ApplicationFiled: June 7, 2016Publication date: August 9, 2018Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi SANO, Naoaki KAWAKAMI, Naohiro YOSHIDA, Shinichiro HATA, Seiichiro YAGI, Masayuki TOMIZAWA
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Patent number: 10017192Abstract: A railcar collision energy absorbing device includes: an energy absorbing element crushed in collision; and a casing extending in a car longitudinal direction so as to accommodate the energy absorbing element. One end of the casing is supported by a main structure of a railcar. The casing is constituted by a plurality of tubular bodies whose overlapping portions are coupled to each other. The casing telescopically contracts in the collision by breaking of a coupling portion between the tubular bodies.Type: GrantFiled: July 17, 2014Date of Patent: July 10, 2018Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi Sano, Naoaki Kawakami, Naohiro Yoshida, Shinichiro Hata, Seiichiro Yagi, Masayuki Tomizawa
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Publication number: 20180162422Abstract: A collision energy absorbing device of a railcar includes: at least one outside plate constituting an outer tube having an axis extending in a car longitudinal direction; and at least one partition plate extending in the car longitudinal direction in an internal space surrounded by the at least one outside plate, the at least one partition plate fixed to the at least one outside plate and dividing the internal space. An end portion of the partition plate which portion is located at an end in a direction perpendicular to the axis is sandwiched by the at least one outside plate and constitutes a part of the outer tube.Type: ApplicationFiled: June 7, 2016Publication date: June 14, 2018Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi SANO, Naoaki KAWAKAMI, Naohiro YOSHIDA, Shinichiro HATA, Seiichiro YAGI, Masayuki TOMIZAWA
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Publication number: 20180079432Abstract: A carbody of a railcar includes: an underframe; a first member provided at one of vertical sides of a vertical center of the underframe, supported by the underframe, and absorbing collision energy; a second member provided at the other vertical side of the vertical center of the underframe, supported by the underframe, and contacting an obstacle when the first member is compressed by collision with the obstacle. In a case where the second member receives a reaction force from the obstacle when the first member is compressed by the collision with the obstacle, the second member transfers to the underframe a moment load that is opposite in a rotational direction to a moment load transferred to the underframe by the first member.Type: ApplicationFiled: May 31, 2016Publication date: March 22, 2018Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi SANO, Naoaki KAWAKAMI, Naohiro YOSHIDA, Shinichiro HATA, Seiichiro YAGI, Masayuki TOMIZAWA
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Publication number: 20160167679Abstract: A railcar head structure includes: a roof bodyshell positioned above a driver's cab window; and an underframe. The underframe includes: a pair of side sills; and a center sill located between the side sills and extending in a car longitudinal direction. A collision post is erected on a tip end of the center sill. A pillar is provided at the driver's cab window and extends so as to divide the driver's cab window. The pillar includes one end joined to the collision post and the other end joined to the roof bodyshell and couples the roof bodyshell and the collision post to each other.Type: ApplicationFiled: July 17, 2014Publication date: June 16, 2016Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi SANO, Naoaki KAWAKAMI, Naohiro YOSHIDA, Shinichiro HATA, Seiichiro YAGI, Masayuki TOMIZAWA
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Publication number: 20160152247Abstract: A railcar collision energy absorbing device includes: an energy absorbing element crushed in collision; and a casing extending in a car longitudinal direction so as to accommodate the energy absorbing element. One end of the casing is supported by a main structure of a railcar. The casing is constituted by a plurality of tubular bodies whose overlapping portions are coupled to each other. The casing telescopically contracts in the collision by breaking of a coupling portion between the tubular bodies.Type: ApplicationFiled: July 17, 2014Publication date: June 2, 2016Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Atsushi SANO, Naoaki KAWAKAMI, Naohiro YOSHIDA, Shinichiro HATA, Seiichiro YAGI, Masayuki TOMIZAWA
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Patent number: 9242655Abstract: A crash energy absorber is provided at a front portion of a carbody of a railcar and configured to crush by a load from a front side to absorb crash energy. The crash energy absorber includes: a main absorbing portion extending in a front-rear direction; and a pair of sub absorbing portions respectively provided at upper and lower sides of the main absorbing portion. Each of the pair of sub absorbing portions is formed integrally with the main absorbing portion via breakable portions each extending in the front-rear direction.Type: GrantFiled: October 11, 2011Date of Patent: January 26, 2016Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Makoto Taguchi, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa
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Patent number: 9108647Abstract: A bodyshell structure of a railcar, includes a plurality of side window opening portions formed on a side bodyshell along a railcar longitudinal direction, and the side window opening portions include a plurality of large window opening portions arranged on a railcar-longitudinal-direction center portion of the side bodyshell and a plurality of small window opening portions arranged on both railcar-longitudinal-direction sides of the large window opening portions and each having a smaller opening area than the large window opening portion.Type: GrantFiled: July 12, 2011Date of Patent: August 18, 2015Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Makoto Taguchi, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa
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Patent number: 9027485Abstract: An obstacle deflector provided at a front portion of an underframe of a carbody of a railcar includes an obstacle deflecting plate configured to protect the carbody from an obstacle on a railway track when the railcar is traveling. The obstacle deflecting plate includes a main plate portion provided to receive the obstacle by a surface thereof and having a curved shape that is convex toward a front side in a traveling direction in plan view and a sub plate portion projecting toward a rear side from the main plate portion and is continuously provided along the main plate portion so as to extend from a convex, curved front end portion of the main plate portion toward a pair of left and right side portions of the main plate portion, the left and right side portions being located at the rear side in the traveling direction.Type: GrantFiled: October 11, 2011Date of Patent: May 12, 2015Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Makoto Taguchi, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa
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Patent number: 8656841Abstract: The present invention is a bodyshell structure of a railcar, the bodyshell structure including: a side bodyshell including an outside plate portion, an inside plate portion, and a joint portion configured to join the outside plate portion and the inside plate portion; an inside window opening formed on the inside plate portion and provided inside the railcar; and an outside window opening formed on the outside plate portion and having a smaller opening area than the inside window opening, and at least one of the inside window opening and the outside window opening has an oval shape extending in the railcar longitudinal direction or a circular shape.Type: GrantFiled: July 12, 2011Date of Patent: February 25, 2014Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Makoto Taguchi, Masashi Ishizuka, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa, Atsushi Sano
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Publication number: 20130239847Abstract: An obstacle deflector provided at a front portion of an underframe of a carbody of a railcar includes an obstacle deflecting plate configured to protect the carbody from an obstacle on a railway track when the railcar is traveling. The obstacle deflecting plate includes a main plate portion provided to receive the obstacle by a surface thereof and having a curved shape that is convex toward a front side in a traveling direction in plan view and a sub plate portion projecting toward a rear side from the main plate portion and is continuously provided along the main plate portion so as to extend from a convex, curved front end portion of the main plate portion toward a pair of left and right side portions of the main plate portion, the left and right side portions being located at the rear side in the traveling direction.Type: ApplicationFiled: October 11, 2011Publication date: September 19, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Makoto Taguchi, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa
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Publication number: 20130233200Abstract: A crash energy absorber is provided at a front portion of a carbody of a railcar and configured to crush by a load from a front side to absorb crash energy. The crash energy absorber includes: a main absorbing portion extending in a front-rear direction; and a pair of sub absorbing portions respectively provided at upper and lower sides of the main absorbing portion. Each of the pair of sub absorbing portions is formed integrally with the main absorbing portion via breakable portions each extending in the front-rear direction.Type: ApplicationFiled: October 11, 2011Publication date: September 12, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Makoto Taguchi, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa
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Publication number: 20130152820Abstract: The present invention is a bodyshell structure of a railcar, the bodyshell structure including a plurality of side window opening portions formed on a side bodyshell along a railcar longitudinal direction, and the side window opening portions include a plurality of large window opening portions arranged on a railcar-longitudinal-direction center portion of the side bodyshell and a plurality of small window opening portions arranged on both railcar-longitudinal-direction sides of the large window opening portions and each having a smaller opening area than the large window opening portion.Type: ApplicationFiled: July 12, 2011Publication date: June 20, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Makoto Taguchi, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa, Atsushi Sano
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Publication number: 20130139718Abstract: The present invention is a bodyshell structure of a railcar, the bodyshell structure including: a side bodyshell including an outside plate portion, an inside plate portion, and a joint portion configured to join the outside plate portion and the inside plate portion; an inside window opening formed on the inside plate portion and provided inside the railcar; and an outside window opening formed on the outside plate portion and having a smaller opening area than the inside window opening, and at least one of the inside window opening and the outside window opening has an oval shape extending in the railcar longitudinal direction or a circular shape.Type: ApplicationFiled: July 12, 2011Publication date: June 6, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Makoto Taguchi, Masashi Ishizuka, Atsushi Sano, Toshiyuki Yamada, Hideki Kumamoto, Seiichiro Yagi, Masayuki Tomizawa, Atsushi Sano