Patents by Inventor Shouhei Nagasaka
Shouhei Nagasaka 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: 11371465Abstract: The cylinder head 3 includes: a lower deck; a wall portion including an upper deck and a lower deck; an upper deck that is provided above the lower deck so as to face the lower deck and that defines a cooling water flow space between the lower deck and the upper deck; and a wall portion that is formed between the lower deck and the upper deck and includes a valve-hole forming wall 40 forming an intake valve hole and an exhaust valve hole which are opened into a lower surface of the lower deck. The lower deck includes: a cooling water introduction hole that passes through the lower deck in a vertical direction so as to extend in a circumferential direction of a virtual circle VC surrounding a valve-hole forming wall in a plan view; and a rib that projects from an upper surface of the lower deck.Type: GrantFiled: October 29, 2018Date of Patent: June 28, 2022Assignee: Komatsu Ltd.Inventors: Yuuki Kageyama, Shouhei Nagasaka
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Publication number: 20210348579Abstract: The cylinder head 3 includes: a lower deck; a wall portion including an upper deck and a lower deck; an upper deck that is provided above the lower deck so as to face the lower deck and that defines a cooling water flow space between the lower deck and the upper deck; and a wall portion that is formed between the lower deck and the upper deck and includes a valve-hole forming wall 40 forming an intake valve hole and an exhaust valve hole which are opened into a lower surface of the lower deck. The lower deck includes: a cooling water introduction hole that passes through the lower deck in a vertical direction so as to extend in a circumferential direction of a virtual circle VC surrounding a valve-hole forming wall in a plan view; and a rib that projects from an upper surface of the lower deck.Type: ApplicationFiled: October 29, 2018Publication date: November 11, 2021Inventors: Yuuki Kageyama, Shouhei Nagasaka
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Patent number: 9726065Abstract: A work vehicle includes a vehicle body, a guiding pipe, a first heating section, and a second heating section. The vehicle body has a partition wall that partitions a space in an inner section into a first region and a second region. The guiding pipe is configured to guide a reducing agent. The guiding pipe has a first pipe section and a second pipe section. The first pipe section is positioned inside the first region. The second pipe section is positioned in the second region. The first heating section heats the first pipe section. The second heating section heats the second pipe section and adjusts the temperature independently from the first heating section.Type: GrantFiled: September 25, 2013Date of Patent: August 8, 2017Assignee: KOMATSU LTD.Inventors: Kiichirou Kouno, Ken Itou, Jin Yogita, Kozo Okuda, Yasuyuki Onodera, Hideo Oguri, Shouhei Nagasaka, Minato Tomuro
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Patent number: 9517552Abstract: A filter remover removes a cylindrical filter element housed in a housing through an opening provided in the housing. The filter remover includes: an attachment portion provided with a screw to be screwed onto the opening; an insert portion that includes a base end integrated with the attachment portion and a tip end in a form of a free end, that is elastically deformable in a radial direction orthogonal to an axial direction of the filter element in conjunction with a movement in the axial direction caused when the attachment portion is screwed, and that is inserted through the opening into a center hole provided in the filter element as the attachment portion is screwed; and an engaging portion that is provided at the tip end and that is engaged with the filter element after the attachment portion is moved for a predetermined amount when the attachment portion is screwed.Type: GrantFiled: December 25, 2013Date of Patent: December 13, 2016Assignee: KOMATSU LTD.Inventors: Minato Tomuro, Shinya Furuhata, Shouhei Nagasaka, Kozo Okuda, Osamu Okamoto, Yukinori Maeda
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Patent number: 9389146Abstract: A malfunction-determining device for an exhaust gas purifying device, which includes a filter device and a pressure measuring device, includes a usability determiner being configured to determine whether or not the pressure measuring device is usable based on a pressure measured by the pressure measuring device and an exhaust gas flow rate, a frozen-state determiner being configured to determine whether or not the pressure measuring device is frozen, and a malfunction determiner being configured to determine that the pressure measuring device has a malfunction when the usability determiner determines that the pressure measuring device is unusable and the frozen-state determiner determines that the pressure measuring device is not frozen.Type: GrantFiled: February 26, 2014Date of Patent: July 12, 2016Assignee: Komatsu Ltd.Inventors: Shinichi Saitou, Shouhei Nagasaka, Mitsuyoshi Kimura, Ken Nakano
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Publication number: 20150308313Abstract: A work vehicle is provided with a vehicle body, a pipe, a first heating section, and a second heating section. The vehicle body has a first region and a second region which is partitioned from the first region. The pipe has a first pipe section and a second pipe section. The first pipe section is positioned inside the first region. The second pipe section is positioned in the second region. The first heating section heats the first pipe section. The second heating section heats the second pipe section and adjusts the temperature independently from the first heating section.Type: ApplicationFiled: September 25, 2013Publication date: October 29, 2015Inventors: Kiichirou KOUNO, Ken ITOU, Jin YOGITA, Kozo OKUDA, Yasuyuki ONODERA, Hideo OGURI, Shouhei NAGASAKA, Minato TOMURO
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Publication number: 20150240696Abstract: A malfunction-determining device for an exhaust gas purifying device, which includes a filter device and a pressure measuring device, includes a usability determiner being configured to determine whether or not the pressure measuring device is usable based on a pressure measured by the pressure measuring device and an exhaust gas flow rate, a frozen-state determiner being configured to determine whether or not the pressure measuring device is frozen, and a malfunction determiner being configured to determine that the pressure measuring device has a malfunction when the usability determiner determines that the pressure measuring device is unusable and the frozen-state determiner determines that the pressure measuring device is not frozen.Type: ApplicationFiled: February 26, 2014Publication date: August 27, 2015Inventors: Shinichi Saitou, Shouhei Nagasaka, Mitsuyoshi Kimura, Ken Nakano
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Publication number: 20150174746Abstract: A filter remover removes a cylindrical filter element housed in a housing through an opening provided in the housing. The filter remover includes: an attachment portion provided with a screw to be screwed onto the opening; an insert portion that includes a base end integrated with the attachment portion and a tip end in a form of a free end, that is elastically deformable in a radial direction orthogonal to an axial direction of the filter element in conjunction with a movement in the axial direction caused when the attachment portion is screwed, and that is inserted through the opening into a center hole provided in the filter element as the attachment portion is screwed; and an engaging portion that is provided at the tip end and that is engaged with the filter element after the attachment portion is moved for a predetermined amount when the attachment portion is screwed.Type: ApplicationFiled: December 25, 2013Publication date: June 25, 2015Inventors: Minato Tomuro, Shinya Furuhata, Shouhei Nagasaka, Kozo Okuda, Osamu Okamoto, Yukinori Maeda
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Publication number: 20150082774Abstract: A work vehicle includes a vehicle body, a guiding pipe, a first heating section, and a second heating section. The vehicle body has a partition wall that partitions a space in an inner section into a first region and a second region. The guiding pipe is configured to guide a reducing agent. The guiding pipe has a first pipe section and a second pipe section. The first pipe section is positioned inside the first region. The second pipe section is positioned in the second region. The first heating section heats the first pipe section. The second heating section heats the second pipe section and adjusts the temperature independently from the first heating section.Type: ApplicationFiled: September 25, 2013Publication date: March 26, 2015Inventors: Kiichirou Kouno, Ken Itou, Jin Yogita, Kozo Okuda, Yasuyuki Onodera, Hideo Oguri, Shouhei Nagasaka, Minato Tomuro
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Patent number: 8814969Abstract: An exhaust gas emission control system includes a cylindrical inflow body and an inflow pipe into which exhaust gas flows. The exhaust gas emission control system also includes a cylindrical outflow body and an outflow pipe from which the exhaust gas flows. The inflow pipe is provided with a louver member that covers an opening of the inflow body near an upstream side of an exhaust gas flow direction. The louver member is provided with slits and inclined plates capable of changing a flow direction of the exhaust gas passing through the slits into a desired direction.Type: GrantFiled: February 17, 2012Date of Patent: August 26, 2014Assignee: Komatsu Ltd.Inventors: Shouhei Nagasaka, Hiroki Sato, Issei Hara, Yosuke Obuchi, Tatsushi Itoh, Yuuki Kasaoka
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Patent number: 8540793Abstract: An exhaust processing device includes a main body tube portion and a closing tube portion. The main body tube portion includes an opening in an axial end thereof, houses a main body exhaust path in an inside thereof, which allows an exhaust gas to pass therethrough. The closing tube portion includes a plate portion and a tubular portion. The plate portion covers the opening of the axial end of the main body tube portion. The tubular portion radially outwardly protrudes from an outer peripheral surface of the main body tube portion, and is integrated with the plate portion. The tubular portion houses an exhaust path in an inside thereof, which communicates with the main body exhaust path. The tubular portion of the closing tube portion includes a first split half portion integrally molded with the plate portion, and a second split half portion joined to the first split half portion.Type: GrantFiled: May 8, 2009Date of Patent: September 24, 2013Assignee: Komatsu Ltd.Inventors: Yuuki Kasaoka, Tatsushi Itou, Shouhei Nagasaka, Hirofumi Takanuki
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Publication number: 20130156652Abstract: An exhaust gas emission control system includes a cylindrical main body shell and an outlet shell that are detachably connected in series along an exhaust gas flow direction. The exhaust gas emission control system also includes a CSF provided in the main body shell, an insulating mat interposed between the main body shell and the CSF, a bulging portion provided at an end of the main body shell near the outlet shell, and a flare that enlarges toward the main body shell. The main body shell and the outlet shell are mutually connected by a fastener having a V-insert that bridges the bulging portion and the flare. An end of the CSF near the outlet shell projects beyond an end of the insulating mat toward the outlet shell while being positioned inside the end of the main body shell.Type: ApplicationFiled: February 15, 2012Publication date: June 20, 2013Inventors: Toshiyuki Kamei, Shouhei Nagasaka
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Publication number: 20130097978Abstract: An exhaust gas emission control system includes a cylindrical inflow body and an inflow pipe into which exhaust gas flows. The exhaust gas emission control system also includes a cylindrical outflow body and an outflow pipe from which the exhaust gas flows. The inflow pipe is provided with a louver member that covers an opening of the inflow body near an upstream side of an exhaust gas flow direction. The louver member is provided with slits and inclined plates capable of changing a flow direction of the exhaust gas passing through the slits into a desired direction.Type: ApplicationFiled: February 17, 2012Publication date: April 25, 2013Inventors: Shouhei Nagasaka, Hiroki Sato, Issei Hara, Yosuke Obuchi, Tatsushi Itoh, Yuuki Kasaoka
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Publication number: 20110047963Abstract: An exhaust processing device includes a main body tube portion and a closing tube portion. The main body tube portion includes an opening in an axial end thereof, houses a main body exhaust path in an inside thereof, which allows an exhaust gas to pass therethrough. The closing tube portion includes a plate portion and a tubular portion. The plate portion covers the opening of the axial end of the main body tube portion. The tubular portion radially outwardly protrudes from an outer peripheral surface of the main body tube portion, and is integrated with the plate portion. The tubular portion houses an exhaust path in an inside thereof, which communicates with the main body exhaust path. The tubular portion of the closing tube portion includes a first split half portion integrally molded with the plate portion, and a second split half portion joined to the first split half portion.Type: ApplicationFiled: May 8, 2009Publication date: March 3, 2011Applicant: KOMATSU LTD.Inventors: Yuuki Kasaoka, Tatsushi Itou, Shouhei Nagasaka, Hirofumi Takanuki
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Patent number: 6935307Abstract: A diesel engine capable of favorably preventing the generation of white smoke even when an engine load is shifted from a high load side to a low load side. For this purpose, a diesel engine (1) includes fuel injection timing control means (42) for controlling fuel injection timing, the fuel injection timing control means (42) advances the fuel injection timing by predetermined time when an engine load becomes a predetermined load (Ff) or lower in an engine stopping step of stopping the diesel engine while gradually reducing the engine load.Type: GrantFiled: July 15, 2003Date of Patent: August 30, 2005Assignee: Komatsu Ltd.Inventors: Kinichirou Watanabe, Takashi Sakasai, Shouhei Nagasaka
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Publication number: 20040074471Abstract: A diesel engine capable of favorably preventing the generation of white smoke even when an engine load is shifted from a high load side to a low load side. For this purpose, a diesel engine (1) includes fuel injection timing control means (42) for controlling fuel injection timing, the fuel injection timing control means (42) advances the fuel injection timing by predetermined time when an engine load becomes a predetermined load (Ff) or lower in an engine stopping step of stopping the diesel engine while gradually reducing the engine load.Type: ApplicationFiled: July 15, 2003Publication date: April 22, 2004Applicant: KOMATSU LTD.Inventors: Kinichirou Watanabe, Takashi Sakasai, Shouhei Nagasaka