Patents by Inventor Hiroki Murata
Hiroki Murata 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: 7548708Abstract: A power supply unit in an image forming apparatus is provided. The power supply unit includes a piezoelectric transformer, an output voltage detecting circuit which detects the output voltage of the piezoelectric transformer, an output voltage control circuit which controls an output voltage from the piezoelectric transformer, and includes a comparator which receives an output voltage setting signal, together with an output voltage detecting signal fed back from the output voltage detecting circuit, to compare the output voltage setting signal and the output voltage detecting signal. The power supply unit also includes a driving frequency supplying circuit which generates a driving frequency signal of the piezoelectric transformer in accordance with a comparison result by the comparator, and supplies the driving frequency signal to the piezoelectric transformer. The time constant of the output voltage control circuit is longer than the time constant of the output voltage detecting circuit.Type: GrantFiled: January 20, 2006Date of Patent: June 16, 2009Assignee: Canon Kabushiki KaishaInventors: Osamu Nagasaki, Atsuhiko Yamaguchi, Tomohiro Nakamori, Takehiro Uchiyama, Kouji Yasukawa, Teruhiko Namiki, Hiroki Murata
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Patent number: 7523059Abstract: Protects a highly confidential parameter against leakage in a distributed computing system. An example distributed computing system causing a plurality of partial calculations to be performed includes parameter storage for storing a parameter set having a plurality of parameters, conversion means for converting a linear parameter, sending means for sending each of converted parameter sets in association with parameter identifying information for identifying the parameter set to cause each of a plurality of calculation processing devices to perform each of a plurality of partial calculations, conversion ratio storage means for storing a conversion ratio of a parameter, conversion ratio searching means for searching for a conversion ratio corresponding to a parameter identifying information, and inversion outputting means for generating a partial calculation result by multiplying a calculation result by an inverse number of the conversion ratio and for outputting a set of the partial calculation results.Type: GrantFiled: July 14, 2004Date of Patent: April 21, 2009Assignee: International Business Machines CorporationInventors: Shu Tezuka, Hiroki Murata
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Publication number: 20080313258Abstract: A front-end server for temporarily holding an operation request for a NAS server, which is sent from a predetermined client, is interposed between the NAS server and clients on a network. This front-end server holds information concerning a correlation among data files stored in the NAS server, optimizes the operation request received from the client based on the information, and transmits the operation request to the NAS server.Type: ApplicationFiled: January 4, 2008Publication date: December 18, 2008Inventors: Yashushi Negishi, Hiroki Murata, Kenichi Okuyama, Kazuya Tago
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Publication number: 20080235328Abstract: A front-end server for temporarily holding an operation request for a NAS server, which is sent from a predetermined client, is interposed between the NAS server and clients on a network. This front-end server holds information concerning a correlation among data files stored in the NAS server, optimizes the operation request received from the client based on the information, and transmits the operation request to the NAS server.Type: ApplicationFiled: January 4, 2008Publication date: September 25, 2008Inventors: Yashushi Negishi, Hiroki Murata, Kenichi Okuyama, Kazuya Tago
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Patent number: 7401129Abstract: A front-end server for temporarily holding an operation request for a NAS server, which is sent from a predetermined client, is interposed between the NAS server and clients on a network. This front-end server holds information concerning a correlation among data files stored in the NAS server, optimizes the operation request received from the client based on the information, and transmits the operation request to the NAS server.Type: GrantFiled: April 21, 2004Date of Patent: July 15, 2008Assignee: International Business Machines CorporationInventors: Yashushi Negishi, Hiroki Murata, Kenichi Okuyama, Kazuya Tago
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Publication number: 20070007855Abstract: A power supply device generates an output voltage by driving a piezoelectric transformer using a frequency signal. The power supply device includes a comparison unit configured to compare an output voltage and a voltage setting signal that sets the output voltage, and a voltage control oscillation unit configured to generate the frequency signal to drive the piezoelectric transformer based on comparison results of the comparison unit. The voltage control oscillation unit generates the frequency signal within a range between the resonant frequency and a spurious resonant frequency closest to the resonant frequency.Type: ApplicationFiled: July 6, 2006Publication date: January 11, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Hiroki Murata, Teruhiko Namiki, Osamu Nagasaki, Atsuhiko Yamaguchi, Tomohiro Nakamori, Takehiro Uchiyama, Kouji Yasukawa
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Publication number: 20060222398Abstract: A power supply unit in an image forming apparatus is provided. The power supply unit includes a piezoelectric transformer, an output voltage detecting circuit which detects the output voltage of the piezoelectric transformer, a comparator which receives an output voltage setting signal, together with an output voltage detecting signal fed back from the output voltage detecting circuit, to compare the output voltage setting signal and the output voltage detecting signal, and a driving frequency supplying circuit which generates the driving frequency of the piezoelectric transformer in accordance with a comparison result by the comparator, and supplies the resultant driving frequency to the piezoelectric transformer. The time constant of the output voltage setting signal is longer than the time constant of the output voltage detecting circuit.Type: ApplicationFiled: January 20, 2006Publication date: October 5, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Osamu Nagasaki, Atsuhiko Yamaguchi, Tomohiro Nakamori, Takehiro Uchiyama, Kouji Yasukawa, Teruhiko Namiki, Hiroki Murata
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Publication number: 20060224661Abstract: A Programmable Terminal (PT) system, a PT device and a PT system management method having a function of displaying a screen having a content on a display screen while at the same time positively preventing the leakage of confidential content are disclosed. When a part read from a screen data file corresponds to the part including a content acquired from a server device, a transmission request command including a information indicating a storage location of a content data corresponding to the contents in the server device is transmitted to the server device through a communication circuit, the content data arriving as a response from the server device is acquired through the communication circuit and stored in a volatile memory. The part is plotted and displayed using the content data stored in the volatile memory and a part configuration information contained in the screen data file in a nonvolatile memory.Type: ApplicationFiled: March 13, 2006Publication date: October 5, 2006Applicants: Omron Corporation, YKK CorporationInventors: Masato Aono, Shinichi Kojima, Hiroki Murata
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Patent number: 6994077Abstract: Cylinders of a diesel engine 1 are provided with cylinder pressure sensors 29a to 29d for detecting combustion chamber pressures. An electronic control unit (ECU) 20 of the engine selects optimum combustion parameters in accordance with a fuel injection mode of fuel injectors 10a to 10d of the engine and a combustion mode determined by the amount of EGR gas supplied from the EGR valve 35 from among a plurality of types of combustion parameters expressing the combustion state of the engine calculated based on the cylinder pressure sensor output and feedback controls the fuel injection amount and fuel injection timing so that the values of the combustion parameters match target values determined in accordance with the engine operating conditions. Due to this, the engine combustion state is controlled to the optimum state at all times regardless of the fuel injection mode or combustion mode.Type: GrantFiled: September 8, 2003Date of Patent: February 7, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Nobuki Kobayashi, Shizuo Sasaki, Taro Aoyama, Kouji Yoshizaki, Hiroki Murata, Yoshiki Hashimoto, Kazuhisa Inagaki, Kiyomi Nakakita, Shoji Nakahara, Yoshihiro Hotta
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Patent number: 6976934Abstract: A shift control system for hybrid vehicles which is constructed to transmit a motive energy of the prime mover to a wheel via a clutch and a transmission, comprises an electric power generating means for generating an electric power by the motive energy of the prime mover, and for supplying the generated electric power to an electric motor, when executing a gear shift of the transmission and transmitting the motive energy of the motor to the wheel.Type: GrantFiled: November 12, 2003Date of Patent: December 20, 2005Assignee: Toyota Jidosha Kabushiki KaishaInventors: Osamu Komeda, Shizuo Sasaki, Yoshiki Hashimoto, Hiroki Murata, Yuichiro Kitamura, Yoshihide Suzuki
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Publication number: 20050229903Abstract: Cylinders of a diesel engine 1 are provided with cylinder pressure sensors 29a to 29d for detecting combustion chamber pressures. An electronic control unit (ECU) 20 of the engine selects optimum combustion parameters in accordance with a fuel injection mode of fuel injectors 10a to 10d of the engine and a combustion mode determined by the amount of EGR gas supplied from the EGR valve 35 from among a plurality of types of combustion parameters expressing the combustion state of the engine calculated based on the cylinder pressure sensor output and feedback controls the fuel injection amount and fuel injection timing so that the values of the combustion parameters match target values determined in accordance with the engine operating conditions. Due to this, the engine combustion state is controlled to the optimum state at all times regardless of the fuel injection mode or combustion mode.Type: ApplicationFiled: September 8, 2003Publication date: October 20, 2005Applicant: Toyota Jidosha Kabushiki KaishaInventors: Nobuki Kobayashi, Shizuo Sasaki, Taro Aoyama, Kouji Yoshizaki, Hiroki Murata, Yoshiki Hashimoto, Kazuhisa Inagaki, Kiyomi Nakakita, Shoji Nakahara, Yoshihiro Hotta
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Publication number: 20050021438Abstract: Protects a highly confidential parameter against leakage in a distributed computing system. An example distributed computing system causing a plurality of partial calculations to be performed includes parameter storage for storing a parameter set having a plurality of parameters, conversion means for converting a linear parameter, sending means for sending each of converted parameter sets in association with parameter identifying information for identifying the parameter set to cause each of a plurality of calculation processing devices to perform each of a plurality of partial calculations, conversion ratio storage means for storing a conversion ratio of a parameter, conversion ratio searching means for searching for a conversion ratio corresponding to a parameter identifying information, and inversion outputting means for generating a partial calculation result by multiplying a calculation result by an inverse number of the conversion ratio and for outputting a set of the partial calculation results.Type: ApplicationFiled: July 14, 2004Publication date: January 27, 2005Applicant: International Business Machines CorporationInventors: Shu Tezuka, Hiroki Murata
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Publication number: 20050021657Abstract: A front-end server for temporarily holding an operation request for a NAS server, which is sent from a predetermined client, is interposed between the NAS server and clients on a network. This front-end server holds information concerning a correlation among data files stored in the NAS server, optimizes the operation request received from the client based on the information, and transmits the operation request to the NAS server.Type: ApplicationFiled: April 21, 2004Publication date: January 27, 2005Applicant: International Business Machines Corp.Inventors: Yashushi Negishi, Hiroki Murata, Kenichi Okuyama, Kazuya Tago
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Publication number: 20040147365Abstract: A shift control system for hybrid vehicles which is constructed to transmit a motive energy of the prime mover to a wheel via a clutch and a transmission, comprises an electric power generating means for generating an electric power by the motive energy of the prime mover, and for supplying the generated electric power to an electric motor, when executing a gear shift of the transmission and transmitting the motive energy of the motor to the wheel.Type: ApplicationFiled: November 12, 2003Publication date: July 29, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Osamu Komeda, Shizuo Sasaki, Yoshiki Hashimoto, Hiroki Murata, Yuichiro Kitamura, Yoshihide Suzuki
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Patent number: 6715474Abstract: An engine where first combustion where the amount of the EGR gas in the combustion chamber is larger than the amount of EGR where the amount of production of soot peaks and almost no soot is produced and a second combustion where the amount of EGR gas in the combustion chamber (5) is smaller than the amount of EGR gas where the amount of production of soot peaks are selectively switched between.Type: GrantFiled: May 11, 2001Date of Patent: April 6, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shizuo Sasaki, Masato Gotoh, Takekazu Ito, Kouji Yoshizaki, Hiroki Murata
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Patent number: 6672050Abstract: An exhaust gas purification device of an engine comprising a particulate filter arranged in an exhaust passage. An electric motor able to impart a vehicle drive power separate from the engine and able to generate electric power from the engine is provided. After the particulate filter finishes being warmed up, when the temperature of the particulate filter is low, the output torque of the engine is increased and the amount of increase of the output torque is consumed by the power generating action of the electric motor.Type: GrantFiled: September 3, 2002Date of Patent: January 6, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroki Murata, Toshio Suematsu, Shizuo Sasaki, Kohei Igarashi, Shinya Hirota, Kazuhiro Itoh, Takamitsu Asanuma, Shunsuke Toshioka, Koichi Kimura, Akira Mikami, Hiroyuki Nagareda
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Patent number: 6672989Abstract: A direct injection type engine comprising a variable speed transmission. Engine control lines indicating the relationship between the engine rotational speed and required torque necessary for obtaining a required output are comprised of a first control line and a second control line at the high torque side and low speed side of the first control line. When the degree of activation of the exhaust gas purification device is low, the required torque and the engine rotational speed are made ones on the first control line in accordance with the required output, while when the degree of activation is high, the required torque and the engine rotational speed are made ones on the second control line in accordance with the required output.Type: GrantFiled: February 4, 2002Date of Patent: January 6, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroki Murata, Shizuo Sasaki, Kohei Igarashi
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Patent number: 6581372Abstract: A compression ignition type engine selectively switching between a first combustion where an amount of recirculated exhaust gas supplied in a combustion chamber (5) is greater than an amount of recirculated exhaust gas where the amount of production of soot peaks and a second combustion where the amount of recirculated exhaust gas supplied in the combustion chamber (5) is smaller than the amount of recirculated exhaust gas where the amount of production of soot peaks. A particulate filter (24) carrying a NOx absorbent (71) is arranged in the engine exhaust passage. When SOx should be released from the NOx absorbent (71) and there is leeway in the electrical energy stored in the battery (41), the first combustion is performed even when the second combustion should be performed and the drop in output power of the energy is made up by the output torque of an electric motor (37).Type: GrantFiled: September 28, 2001Date of Patent: June 24, 2003Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shizuo Sasaki, Kohei Igarashi, Hiroki Murata
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Publication number: 20030066286Abstract: An exhaust gas purification device of an engine comprising a particulate filter arranged in an exhaust passage. An electric motor able to impart a vehicle drive power separate from the engine and able to generate electric power from the engine is provided. After the particulate filter finishes being warmed up, when the temperature of the particulate filter is low, the output torque of the engine is increased and the amount of increase of the output torque is consumed by the power generating action of the electric motor.Type: ApplicationFiled: September 3, 2002Publication date: April 10, 2003Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Murata, Toshio Suematsu, Shizuo Sasaki, Kohei Igarashi, Setsuko Igarashi, Shinya Hirota, Kazuhiro Itoh, Takamitsu Asanuma, Shunsuke Toshioka, Koichi Kimura, Akira Mikami, Hiroyuki Nagareda
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Patent number: 6516609Abstract: There is provided a compression ignition type engine comprising an exhaust gas purification catalyst, and an electric motor for generating an output separated from the engine output. The engine may selectively perform a first control to make the engine output an output larger than that determined on the basis of the engine operation state, and a second control to operate the engine under the first combustion mode in which the inert gas amount in the chamber is larger than that in which the soot generation amount is peak.Type: GrantFiled: December 20, 2001Date of Patent: February 11, 2003Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kohei Igarashi, Shizuo Sasaki, Hiroki Murata