Patents by Inventor Atsushi Shimada
Atsushi Shimada 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: 20090241861Abstract: It is an object of the invention to provide an engine system using a small-sized heat exchanger having a high efficiency and a stable performance for heating and vaporizing a hydrogen medium supplied to a reactor vessel.Type: ApplicationFiled: March 26, 2009Publication date: October 1, 2009Inventors: Tadashi Sano, Takao Ishikawa, Atsushi Shimada
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Publication number: 20090227839Abstract: An electronic endoscopic apparatus of the present invention can improve the usage efficiency of a circuit of a control section therein and can improve the reliability of operations of the circuit. The electronic endoscopic apparatus is an electronic endoscopic apparatus having multiple operation modes to be executed exclusively, the apparatus internally including an FPGA 1 that internally includes a CPU 10 and peripheral circuits and controls the execution of the operation modes and a switching request detecting section that detects a request for switching to the operation mode to be executed, wherein the internal configuration of the FPGA 1 is changed based on the detection result by the switching request detecting section.Type: ApplicationFiled: April 27, 2006Publication date: September 10, 2009Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventors: Atsushi Shimada, Yusuke Yabe, Tomoya Takahashi, Susumu Hashimoto
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Patent number: 7568452Abstract: An object of the invention is to provide an engine system driving an engine by using a hydrogen rich gas generated from a medium chemically repeating a hydrogen absorption and a hydrogen desorption as one of fuels, in which the engine system can efficiently generate a hydrogen rich gas from the medium. In an engine system which mounts a medium chemically repeating a hydrogen absorption and a hydrogen desorption thereon, is provided with a hydrogen supplying apparatus generating or storing a hydrogen rich gas from the medium, and drives an engine by using the hydrogen rich gas as one of fuels, the engine system has a detecting portion detecting an operating state of the engine, and a medium supplying amount control means controlling a supplying amount of the medium supplied to the hydrogen supplying apparatus in correspondence to a result of detection of the detecting portion.Type: GrantFiled: January 25, 2007Date of Patent: August 4, 2009Assignee: Hitachi, Ltd.Inventors: Atsushi Shimada, Takao Ishikawa, Takeyuki Itabashi, Hiroshi Kanemoto
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Publication number: 20090139470Abstract: An engine system in which either hydrogen produced from a hydrogen containing medium in terms of reaction using a catalyst or a mixture of the hydrogen and the hydrogen containing medium is employed as a fuel, in order to restrict heat deformation of a reactor, the engine system including a reactor configured to cause a reaction using a catalyst, in which the reactor is constituted by alternately disposing plural exhaust passages and plural fuel passageways of the engine system with a wall interposed therebetween; at least one carrier configured to carry the catalyst and to be formed in a substantially rectangular plate shape is fitted in at least one of fuel passageways; and the carrier is provided with a plate portion which has a surface disposed in a fuel flowing direction and is formed in a substantially rectangular plate shape and at least one slit portion which divides the surface of the plate portion in the fuel flowing direction.Type: ApplicationFiled: November 26, 2008Publication date: June 4, 2009Inventors: Tadashi Sano, Shigenori Togashi, Takao Ishikawa, Atsushi Shimada, Kenichi Souma
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Patent number: 7516731Abstract: A control apparatus of an engine having a compression ignition combustion mode and a spark ignition combustion mode selects the spark ignition combustion mode when operation conditions fall within a spark ignition operation area set in a spark ignition operation area/compression ignition operation area setting map memory part and selects the compression ignition combustion mode when the operation conditions fall within a switching stable area set in the memory part upon operation by the spark ignition combustion mode. The control apparatus controls to continue the compression ignition combustion mode as long as the operation conditions fall within a compression ignition operation area set in the memory part upon operation by the compression ignition combustion mode.Type: GrantFiled: September 14, 2006Date of Patent: April 14, 2009Assignee: Hitachi, Ltd.Inventors: Shiro Yamaoka, Hiromu Kakuya, Kunihiko Suzuki, Shinya Satou, Atsushi Shimada
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Publication number: 20090059592Abstract: A light source device includes a light source lamp, a rotary plate, a heat absorbing portion, and a filter mounting member. The light source lamp emits illumination light. The rotary plate includes multiple opening portions that are selectively disposed in the illumination light path of the light source lamp. A reflective filter that reflects light of a wavelength that acts a heat source in illumination light is provided in one of the multiple opening portions of the rotary plate. The heat absorbing portion absorbs heat included in reflected light reflected by the reflective filter in the opening portion. The filter mounting member disposes the reflective filter in the opening portion at a predetermined angle of inclination to the optical axis of the illumination light. By disposing the inclined reflective filter in the illumination light path, reflected light reflected by the reflective filter is reflected towards the heat absorbing portion.Type: ApplicationFiled: August 8, 2008Publication date: March 5, 2009Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventors: Seiki TORIYAMA, Mutsumi OSHIMA, Shinji YAMASHITA, Keiichi TSUCHIDA, Tomoya TAKAHASHI, Atsushi SHIMADA, Yusuke YABE, Kyosuke MIZUNO
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Publication number: 20090052185Abstract: A light source device includes a light-condensing device that condenses an illumination light that is emitted from a light source lamp. The light-condensing device includes at least one lens, a lens holder in which a lens is fixedly provided, and a lens holding member. The lens holding member is a member for fixing a lens to the lens holder. The lens holding member causes at least one circumferential portion of the lens to protrude to the lens holder side, and causes the optical axis of the lens to match the optical axis of the illumination light.Type: ApplicationFiled: August 8, 2008Publication date: February 26, 2009Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventors: Seiki TORIYAMA, Mutsumi OSHIMA, Shinji YAMASHITA, Keiichi TSUCHIDA, Tomoya TAKAHASHI, Atsushi SHIMADA, Yusuke YABE, Kyosuke MIZUNO
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Publication number: 20090000575Abstract: An object of the present invention is, in an engine system including a medium which chemically repeats storage and release of hydrogen, to provide an engine system where CO2 emissions can be suppressed and system efficiency is excellent. The engine system includes a hydrogen supply device for producing hydrogen rich gas from a medium which chemically repeats the storage and release of hydrogen, and drives an engine using the hydrogen rich gas produced in the hydrogen supply device as one of the fuels. This engine system is characterized by comprising a waste heat supply device for supplying waste heat of the engine to the hydrogen supply device, a generator which generates electricity by power of the engine, an energy storage device for storing electric power produced by the generator, and a motor for converting electric power discharged from the energy storage device into power.Type: ApplicationFiled: June 26, 2008Publication date: January 1, 2009Inventors: Atsushi Shimada, Takao Ishikawa, Masatoshi Sugimasa
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Publication number: 20080241615Abstract: There is provided a hydrogen storage and/or supply device utilizing an organic compound medium capable of being repeatedly hydrogenated and dehydrogenated. This device comprises: a catalyst member formed of a stack of a plurality of catalyst plates for storing and/or releasing hydrogen through a chemical reaction of the organic compound medium by means of a metal catalyst; a heat collector plate for supplying heat from a heat source to the catalyst member; and a heat transfer portion in contact with the plurality of catalyst plates and the heat collector plate. Each catalyst plate includes: the metal catalyst; a substrate; a catalyst support formed on at least one face of the substrate for supporting the metal catalyst; and a flow channel for passing the organic compound medium therethrough. Furthermore, the heat transfer portion has a thermal conductivity higher than that of the catalyst support.Type: ApplicationFiled: January 29, 2008Publication date: October 2, 2008Inventors: Masatoshi Sugimasa, Takao Ishikawa, Kohin Shu, Atsushi Shimada
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Publication number: 20080202449Abstract: An engine system comprises a detection means for detecting a supply quantity or supply pressure of hydrogen rich gas which is disposed in a hydrogen rich gas supply pipe for supplying hydrogen rich gas to a combustion chamber of the engine, a hydrogen rich gas supply valve control means for controlling the supply of hydrogen rich gas by controlling the open/close timing and the amount of open/close lift of the hydrogen rich gas supply valve disposed in the combustion chamber of the engine based on the supply quantity or supply pressure detected by the detection means, an inlet valve for supplying air to the combustion chamber of the engine separately from the hydrogen rich gas supply valve, and an inlet valve control means for controlling the volume of air taken into the combustion chamber of the engine by the inlet valve.Type: ApplicationFiled: January 9, 2008Publication date: August 28, 2008Applicant: Hitachi, Ltd.Inventors: Atsushi SHIMADA, Takao Ishikawa, Akiyoshi Komura, Masatoshi Sugimasa, Takeyuki Itabashi
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Publication number: 20080110420Abstract: A hydrogen engine system for driving an engine with hydrogen gases as a fuel comprises a hydrogenated liquid fuel tank, which holds a hydrogenated liquid fuel in a liquid phase, a preheater, to which the hydrogenated liquid fuel and a dehydrogenated fuel from the hydrogen feed unit are transported and which preheats the hydrogenated liquid fuel owing to heat exchange, an vaporizer, to which the hydrogenated liquid fuel as preheated and exhaust gases of the engine are transported and which heats the hydrogenated liquid fuel to put the same in a vapor phase, and a hydrogen feed unit, to which the hydrogenated liquid fuel as vaporized and exhaust gases of the engine are transported and which generates hydrogen gases owing to dehydrogenation to transport the same to the engine.Type: ApplicationFiled: October 3, 2007Publication date: May 15, 2008Inventors: Hirotoshi Ishimaru, Tetsuro Miyamoto, Takao Ishikawa, Atsushi Shimada, Masatoshi Sugimasa
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Patent number: 7354259Abstract: There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to a backside of scroll members to produce an attractive force to attract both scroll members. A control bypass is also provided for communicating compression chambers with a discharge system only when pressure in the compression chambers is high.Type: GrantFiled: November 4, 2005Date of Patent: April 8, 2008Assignee: Hitachi, Ltd.Inventors: Isamu Tsubono, Masahiro Takebayashi, Isao Hayase, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima, Atsushi Shimada, Takehiro Akizawa
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Patent number: 7333885Abstract: There is provided an engine control unit to ensure operational performance and safety performance of a vehicle by carrying out switchover of combustion according to an operating condition of a vehicle (automobile). A vehicle peripheral condition such as vehicular gap, etc., a traveling geographical state, a condition that ensures vehicle stability, etc. are acquired, and switchover of combustion, for example, switchover between compression ignition combustion and spark ignition combustion is effected correspondingly.Type: GrantFiled: May 30, 2006Date of Patent: February 19, 2008Assignee: Hitachi, Ltd.Inventors: Hiromu Kakuya, Shiro Yamaoka, Atsushi Shimada, Shinya Satou, Kunihiko Suzuki
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Publication number: 20070209609Abstract: An object of the invention is to provide an engine system driving an engine by using a hydrogen rich gas generated from a medium chemically repeating a hydrogen absorption and a hydrogen desorption as one of fuels, in which the engine system can efficiently generate a hydrogen rich gas from the medium. In an engine system which mounts a medium chemically repeating a hydrogen absorption and a hydrogen desorption thereon, is provided with a hydrogen supplying apparatus generating or storing a hydrogen rich gas from the medium, and drives an engine by using the hydrogen rich gas as one of fuels, the engine system has a detecting portion detecting an operating state of the engine, and a medium supplying amount control means controlling a supplying amount of the medium supplied to the hydrogen supplying apparatus in correspondence to a result of detection of the detecting portion.Type: ApplicationFiled: January 25, 2007Publication date: September 13, 2007Applicant: Hitachi, Ltd.Inventors: Atsushi Shimada, Takao Ishikawa, Takeyuki Itabashi, Hiroshi Kanemoto
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Publication number: 20070157604Abstract: A first, a second, and a third combustion region are defined by the air-fuel ratio of the mixture gas feeding combustion. Upon switching of combustion regions from the first combustion region to the third combustion region and from the third combustion region to the first combustion region, namely, when the second combustion region is passed, the mass of NOx emission downstream of an exhaust purifying device and the torque variation are estimated online. Based on the estimated value of the mass of NOx emission and the estimated value of the torque variation, the mass of intake air introduced into the combustion chamber is adjusted in a manner different from when normal, such as by changing the amount of lift of the intake valve, for example, so as to reduce the mass of NOx emission downstream of the exhaust purifying device and the torque variation below predetermined values upon passing of the second combustion region.Type: ApplicationFiled: February 9, 2004Publication date: July 12, 2007Applicant: Hitachi, Ltd.Inventors: Hiromu Kakuya, Shinji Nakagawa, Shiro Yamaoka, Atsushi Shimada
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Publication number: 20070149847Abstract: An endoscope control device includes: a safety maintaining circuit for maintaining safety in terms of function or use-purpose of the endoscope control device; a control section for controlling operation of the endoscope control device; and an activation section for activating the control section, wherein the safety maintaining circuit is formed in the same device as at least one of the control section and the activation section.Type: ApplicationFiled: December 20, 2006Publication date: June 28, 2007Applicant: Olympus Medical Systems Corp.Inventors: Atsushi Shimada, Yusuke Yabe, Susumu Hashimoto, Tomoya Takahashi
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Publication number: 20070149857Abstract: An endoscope system of the present invention has a video processor and a light source device, and an endoscope can be connected thereto. And a control portion of the light source device detects connection with the endoscope and the video processor, detects connection with the video processor and the light source device and detects the type of the endoscope by an endoscope detection portion. And when non-connection of the endoscope and the video processor is detected, or non-connection of the video processor and the light source device is detected, the control portion controls so that the light amount of illumination light supplied from the light source device to the endoscope becomes a predetermined light amount according the detected type of the endoscope.Type: ApplicationFiled: November 7, 2006Publication date: June 28, 2007Applicant: Olympus Medical Systems Corp.Inventors: Yusuke Yabe, Tomoya Takahashi, Atsushi Shimada, Susumu Hashimoto
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Publication number: 20070088193Abstract: A light source device for an endoscope, characterized by having a light source for supplying illuminating light to an object, endoscope connection means optically connected to an endoscope that has discrimination information for discriminating the kind of endoscope, discrimination means for discriminating the endoscope based on the discrimination information of the endoscope connected to the endoscope connection means, change means for the changing illumination condition of the illuminating light, and control means for controlling the change means based on the result of discrimination by the discrimination means.Type: ApplicationFiled: November 22, 2006Publication date: April 19, 2007Inventors: Koji OMORI, Mutsumi OHSHIMA, Yasukazu KOGEN, Tomoya TAKAHASHI, Atsushi Shimada
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Publication number: 20070062485Abstract: A control apparatus of an engine having a compression ignition combustion mode and a spark ignition combustion mode selects the spark ignition combustion mode when operation conditions fall within a spark ignition operation area set in a spark ignition operation area/compression ignition operation area setting map memory part and selects the compression ignition combustion mode when the operation conditions fall within a switching stable area set in the memory part upon operation by the spark ignition combustion mode. The control apparatus controls to continue the compression ignition combustion mode as long as the operation conditions fall within a compression ignition operation area set in the memory part upon operation by the compression ignition combustion mode.Type: ApplicationFiled: September 14, 2006Publication date: March 22, 2007Applicant: Hitachi LTD.Inventors: Shiro Yamaoka, Hiromu Kakuya, Kunihiko Suzuki, Shinya Satou, Atsushi Shimada
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Publication number: 20060271266Abstract: There is provided an engine control unit to ensure operational performance and safety performance of a vehicle by carrying out switchover of combustion according to an operating condition of a vehicle (automobile). A vehicle peripheral condition such as vehicular gap, etc., a traveling geographical state, a condition that ensures vehicle stability, etc. are acquired, and switchover of combustion, for example, switchover between compression ignition combustion and spark ignition combustion is effected correspondingly.Type: ApplicationFiled: May 30, 2006Publication date: November 30, 2006Applicant: Hitachi, Ltd.Inventors: Hiromu Kakuya, Shiro Yamaoka, Atsushi Shimada, Shinya Satou, Kunihiko Suzuki