Patents by Inventor Yasutaka Kuroda
Yasutaka Kuroda 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: 20240133414Abstract: A fastening member in an embodiment consists of a bolt and a nut. A hard layer made of a metal nitride is formed on a surface of a threaded portion of the bolt or a surface of a threaded portion of the nut.Type: ApplicationFiled: December 29, 2023Publication date: April 25, 2024Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Shun OINUMA, Yasutaka KAWADA, Takashi MIURA, Hidekazu MIYAJIMA, Toru ABE, Kazuki KURODA
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Patent number: 10819292Abstract: Ringing of a signal after passing through a low pass filter in an LINC type linear amplifier is remedied. A linear amplifying device includes the linear amplifier including the low pass filter for removing high-frequency components; and an origin avoiding circuit which receives an original input signal and is provided upstream of the linear amplifier. If the original input signal is sampled in the vicinity of an origin, the origin avoiding circuit modifies a sampled value so at to replace the sampled value with a fixed value, and supplies the modified input signal to the linear amplifier.Type: GrantFiled: May 29, 2017Date of Patent: October 27, 2020Assignee: NEC NETWORK AND SENSOR SYSTEMS, LTDInventors: Yasutaka Kuroda, Noriaki Sumita, Takashi Ishikawa, Tomohiko Oohashi, Kazuki Kishi
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Patent number: 10495351Abstract: A two-stage pressure buildup refrigeration cycle apparatus has a low-pressure side compressor, a high-pressure side compressor, and a controller. The controller controls, for improving a COP, the low-pressure side compressor and the high-pressure side compressor in a COP improving operation mode in which a refrigerant discharge capacity of one of the low-pressure side compressor and the high-pressure side compressor is set based on a refrigerant discharge capacity of an other of the low-pressure side compressor and the high-pressure side compressor, when a required level of a refrigeration performance is low. The controller controls the low-pressure side compressor and the high-pressure side compressor in a high performance operation mode in which a refrigerant discharge capacity of the high-pressure side compressor is increased after increasing a refrigerant discharge capacity of the low-pressure side compressor, when the required level of the refrigeration performance is high.Type: GrantFiled: August 28, 2015Date of Patent: December 3, 2019Assignee: DENSO CORPORATIONInventor: Yasutaka Kuroda
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Publication number: 20190280653Abstract: Ringing of a signal after passing through a low pass filter in an LINC type linear amplifier is remedied. A linear amplifying device includes the linear amplifier including the low pass filter for removing high-frequency components; and an origin avoiding circuit which receives an original input signal and is provided upstream of the linear amplifier. If the original input signal is sampled in the vicinity of an origin, the origin avoiding circuit modifies a sampled value so at to replace the sampled value with a fixed value, and supplies the modified input signal to the linear amplifier.Type: ApplicationFiled: May 29, 2017Publication date: September 12, 2019Applicant: NEC Network and Sensor Systems, Ltd.Inventors: Yasutaka KURODA, Noriaki SUMITA, Takashi ISHIKAWA, Tomohiko OOHASHI, Kazuki KISHI
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Publication number: 20170254569Abstract: A two-stage pressure buildup refrigeration cycle apparatus has a low-pressure side compressor, a high-pressure side compressor, and a controller. The controller controls, for improving a COP, the low-pressure side compressor and the high-pressure side compressor in a COP improving operation mode in which a refrigerant discharge capacity of one of the low-pressure side compressor and the high-pressure side compressor is set based on a refrigerant discharge capacity of an other of the low-pressure side compressor and the high-pressure side compressor, when a required level of a refrigeration performance is low. The controller controls the low-pressure side compressor and the high-pressure side compressor in a high performance operation mode in which a refrigerant discharge capacity of the high-pressure side compressor is increased after increasing a refrigerant discharge capacity of the low-pressure side compressor, when the required level of the refrigeration performance is high.Type: ApplicationFiled: August 28, 2015Publication date: September 7, 2017Inventor: Yasutaka KURODA
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Publication number: 20100259677Abstract: An image display system according to the present invention includes a host terminal which is a terminal transmitting character code information, and an image display device connected to the host terminal through a network and displaying an image. The image display device includes: an input source selecting means as a first input means to which video signals are inputted, a network I/F means as a first network interface means for receiving the character code information transmitted from the host terminal, a character image generating means for generating a character image from the character code information in the network. I/F means, an image synthesis means synthesizing the video signals in the input source selecting means and the character image in the character image generating means, and an image display means displaying the image synthesized in the image synthesis means.Type: ApplicationFiled: January 15, 2010Publication date: October 14, 2010Inventors: Kazuaki MATOBA, Takeshi Yamada, Yasutaka Kuroda, Susumu Nakagakiuchi
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Publication number: 20100024469Abstract: A refrigerating cycle apparatus includes a circulation refrigerant, a compressor, a condenser, an expansion valve, an evaporator, and an internal heat exchanger. The internal heat exchanger is disposed to perform heat exchange between a high pressure circulation refrigerant flowing from the condenser to the expansion valve and a low pressure circulation refrigerant flowing from the evaporator and the compressor. The circulation refrigerant has a property indicating an isentropic line having a gradient greater than a gradient of an isentropic line of a R134a refrigerant and a saturation characteristic curve having a two-phase region enthalpy width smaller than a two-phase region enthalpy width of the R134a refrigerant, on a p-h chart.Type: ApplicationFiled: July 29, 2009Publication date: February 4, 2010Applicant: DENSO CORPORATIONInventors: Shun Kurata, Takashi Yamanaka, Shin Nishida, Yuuichi Shirota, Yasutaka Kuroda
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Publication number: 20090241570Abstract: In a refrigerant cycle system, a compression mechanism of an electric compressor sucks and compresses refrigerant, and an electric motor that drives the compression mechanism is cooled by the refrigerant. A variable throttle mechanism decompresses the refrigerant discharged from the electric compressor. A motor temperature detector detects a temperature of the electric motor. A motor protection determiner determines whether the temperature of the electric motor detected by the motor temperature detector is equal to or higher than a criterion value. A motor protection controller controls the variable throttle mechanism so that an opening degree of the variable throttle mechanism does not decrease when the motor protection determiner determines that the temperature of the electric motor is equal to or higher than the criterion value.Type: ApplicationFiled: March 17, 2009Publication date: October 1, 2009Applicant: DENSO CORPORATIONInventors: Nobukazu Kuribayashi, Yasutaka Kuroda, Mitsuyo Oomura, Ken Matsunaga, Satoshi Itoh
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Patent number: 7520320Abstract: An automotive air conditioning system has a primary hot water circuit 11 located on a side where a vehicle installed heat generator 10 is located and a secondary hot water circuit 13 which includes a hot water type heater core 12 for heating passenger compartment outlet air, whereby when in a heating mode, in the event that a coolant temperature TW1 of the primary hot water circuit is lower than a coolant temperature TW2 of the secondary hot water circuit 13, an opening and closing valve 26 is closed, whereas an opening and closing valve 23 is opened, so that a state is created in which the hot water circuits 11, 13 are separated from each other.Type: GrantFiled: February 16, 2005Date of Patent: April 21, 2009Assignee: Denso CorporationInventors: Satoshi Itoh, Yoshitaka Tomatsu, Yasutaka Kuroda
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Publication number: 20070123330Abstract: Disclosed is a gaming machine 1. The gaming machine 1 comprises a liquid crystal display unit 2b for notifying the information about the timing at which a player should conduct the stop operation, and an image control MICOM 81 for determining whether the stop operation is carried out at the timing at which a player should conduct the stop operation, and updating a value of point, on condition that it is determined that the stop operation is continuously carried out at the corresponding timing. The image control MICOM 81 carries out a game over 100 times, in which the internal winning combination determined by the main control means 71 corresponds to the effect data determined by the effect mode determining means by one-to-one, on condition that the value of point is ?50?.Type: ApplicationFiled: March 21, 2006Publication date: May 31, 2007Applicant: Aruze Corp.Inventors: Takaaki Hishinuma, Takayuki Hirauchi, Yousuke Kamada, Yasutaka Kuroda, Masanobu Shibata, Akihiro Yokota, Muneki Shiraishi
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Publication number: 20070099692Abstract: Disclosed is a gaming machine. The gaming machine 1 comprises a main control circuit 71, which starts an operation of replay time, on condition that a combination of symbols consisting of at least two types of symbols is displayed by a combination of symbol display areas connected by an activated line.Type: ApplicationFiled: March 30, 2006Publication date: May 3, 2007Applicant: Aruze Corp.Inventors: Takaaki Hishinuma, Takayuki Hirauchi, Yousuke Kamada, Yasutaka Kuroda
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Publication number: 20070099691Abstract: Disclosed is a gaming machine. According to the gaming machine, a main control circuit of the gaming machine awards a payout to a player when a combination of symbols predetermined is displayed along a center line, which the payout being different from a payout to be awarded to the player when the combination of symbols predetermined is displayed by a display line different from the center line. A liquid crystal display unit clearly informs the payout to be awarded to be the player when the combination of symbols predetermined is displayed along the center line, and gives a hint as to the payout to be awarded to the player when the combination of symbols predetermined is displayed along the display line different from the center line.Type: ApplicationFiled: March 16, 2006Publication date: May 3, 2007Applicant: Aruze Corp.Inventors: Takaaki Hishinuma, Takayuki Hirauchi, Yousuke Kamada, Yasutaka Kuroda
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Publication number: 20050178523Abstract: An automotive air conditioning system has a primary hot water circuit 11 located on a side where a vehicle installed heat generator 10 is located and a secondary hot water circuit 13 which includes a hot water type heater core 12 for heating passenger compartment outlet air, whereby when in a heating mode, in the event that a coolant temperature TW1 of the primary hot water circuit is lower than a coolant temperature TW2 of the secondary hot water circuit 13, an opening and closing valve 26 is closed, whereas an opening and closing valve 23 is opened, so that a state is created in which the hot water circuits 11, 13 are separated from each other.Type: ApplicationFiled: February 16, 2005Publication date: August 18, 2005Inventors: Satoshi Itoh, Yoshitaka Tomatsu, Yasutaka Kuroda
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Publication number: 20030079873Abstract: A vehicle air conditioning system prevents the air quality from an air conditioner from becoming worse and also prevents the manufacturing cost of heat exchangers such as an interior heat exchanger, from increasing. The vehicle air conditioning system allows a heat pump unit to be operated at the maximum heating ability within a limit of the pressure resistance of the interior heat exchanger when the hot water temperature is lower than a predetermined temperature. If the temperature of hot water is equal to or higher than a predetermined temperature, the heating ability of the heat pump unit decreases with an increasing temperature of the hot water. Thus, high-pressure refrigerant cannot continuously flow through the interior heat exchanger for a long time period, so that a sufficient pressure resistance can be obtained without excessively setting the pressure of the interior heat exchanger.Type: ApplicationFiled: October 28, 2002Publication date: May 1, 2003Inventor: Yasutaka Kuroda
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Patent number: 6543238Abstract: In a refrigerant cycle system, refrigerant compressed in a first compressor is cooled and condensed in a radiator, and refrigerant from the radiator branches into main-flow refrigerant and supplementary-flow refrigerant. The main-flow refrigerant is decompressed in an expansion unit while expansion energy of the main-flow refrigerant is converted to mechanical energy. Thus, the enthalpy of the main-flow refrigerant is reduced along an isentropic curve. Therefore, even when the pressure within the evaporator increases, refrigerating effect is prevented from being greatly reduced in the refrigerant cycle system. Further, refrigerant flowing into the radiator is compressed using the converted mechanical energy. Thus, coefficient of performance of the refrigerant cycle system is improved.Type: GrantFiled: June 26, 2001Date of Patent: April 8, 2003Assignees: DENSO Corporation, Nippon Soken, Inc.Inventors: Yasushi Yamanaka, Yasutaka Kuroda, Shin Nishida, Motohiro Yamaguchi, Yukikatsu Ozaki, Tadashi Hotta, Sadahisa Onimaru, Mitsuo Inagaki
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Publication number: 20030062152Abstract: In a radiator for a supercritical cycle, a refrigerant outlet is provided at a position higher than that of a refrigerant inlet in a vertical direction such that refrigerant flows from a lower side to an upper side in the radiator. Accordingly, even when temperature of cool air to pass through the lower side of the radiator is high, the temperature of refrigerant flowing in the lower side is so high that a sufficient difference in temperature between cool air and refrigerant can be provided. As a result, a cooling efficiency of refrigerant can be improved.Type: ApplicationFiled: October 25, 2002Publication date: April 3, 2003Inventors: Yasutaka Kuroda, Yoshitaka Tomatsu, Nobuharu Kakehashi, Motohiro Yamaguchi
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Patent number: 6530230Abstract: When the first pressure reducing device 161 is fixed to the accumulator tank 140 and the internal heat exchanger 150 is housed in the accumulator tank 140, the accumulator, the first pressure reducing device 161 and the internal heat exchanger 150 are integrated into one body. Due to the foregoing, it is possible to eliminate parts for piping to connect the first pressure reducing device 161 with the internal heat exchanger 150. The mass of the vibration system of the first pressure reducing device 161 including the accumulator tank 140 and the internal heat exchanger 150 is increased. Therefore, even if the valve body 413 in the first pressure reducing device is vibrated, it becomes difficult for other portions to vibrate. Accordingly, it is possible to reduce noise (vibration) generated when refrigerant is decompressed by the first pressure reducing device 161.Type: GrantFiled: November 9, 2001Date of Patent: March 11, 2003Assignee: Denso CorporationInventors: Kazuya Makizono, Toshio Hirata, Yasutaka Kuroda, Yoshiyuki Yamauchi
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Patent number: 6505476Abstract: In a refrigerant cycle system, a control unit controls both a refrigerant amount discharged from a compressor and an opening degree of a pressure control valve so that theoretical efficiency of a super-critical refrigerant cycle and efficiency of the compressor are improved. Therefore, the effective coefficient of performance of the refrigerant cycle is improved, while necessary capacity of components of the refrigerant cycle is obtained.Type: GrantFiled: October 23, 2000Date of Patent: January 14, 2003Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Shin Nishida, Motohiro Yamaguchi, Satoshi Itoh, Yasutaka Kuroda, Yoshitaka Tomatsu, Yasushi Yamanaka, Yukikatsu Ozaki
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Patent number: 6484523Abstract: In a vehicle air conditioner having a refrigerant cycle using carbon dioxide as refrigerant, a displacement of a compressor is changed and controlled, so that an air temperature immediately after passing through an evaporator becomes approximately 0° C., and it can prevent a refrigerant amount discharged from the compressor from being larger than a predetermined flow amount. Because the refrigerant amount discharged from the compressor is controlled to be not larger than the predetermined flow amount, it can prevent a high-pressure side refrigerant pressure and a high-pressure side refrigerant temperature from being excessively increased in the refrigerant cycle.Type: GrantFiled: August 8, 2001Date of Patent: November 26, 2002Assignee: DENSO CorporationInventors: Yasutaka Kuroda, Yoshitaka Tomatsu, Ryo Kobayashi, Masafumi Nakashima, Toshio Hirata
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Publication number: 20020078702Abstract: When the first pressure reducing device 161 is fixed to the accumulator tank 140 and the internal heat exchanger 150 is housed in the accumulator tank 140, the accumulator, the first pressure reducing device 161 and the internal heat exchanger 150 are integrated into one body. Due to the foregoing, it is possible to eliminate parts for piping to connect the first pressure reducing device 161 with the internal heat exchanger 150. The mass of the vibration system of the first pressure reducing device 161 including the accumulator tank 140 and the internal heat exchanger 150 is increased. Therefore, even if the valve body 413 in the first pressure reducing device is vibrated, it becomes difficult for other portions to vibrate. Accordingly, it is possible to reduce noise (vibration) generated when refrigerant is decompressed by the first pressure reducing device 161.Type: ApplicationFiled: November 9, 2001Publication date: June 27, 2002Inventors: Kazuya Makizono, Toshio Hirata, Yasutaka Kuroda, Yoshiyuki Yamauchi