Patents by Inventor Daijiro Ito
Daijiro Ito 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: 10184224Abstract: An edge of a guide hole includes a first contact portion, a second contact portion, and a guide portion. The first contact portion is in contact with the second connecting pin while the second connecting pin is positioned in the lock actuation position. The second contact portion is in contact with the second connecting pin while the second connecting pin is positioned in the lock release position. The guide portion extends in a direction intersecting the movement direction of the second connecting pin between the first contact portion and the second contact portion. The guide portion is pressed by the second connecting pin that moves from the lock actuation position to the lock release position in order to resist the urging force of an urging member and cause the second lock member to move from the locked position to the unlocked position.Type: GrantFiled: June 23, 2015Date of Patent: January 22, 2019Assignee: KOMATSU LTD.Inventors: Daijiro Ito, Tsuyoshi Yoshida, Akira Hashimoto, Takuya Tsukada, Kenichi Higuchi
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Patent number: 9903091Abstract: A quick coupler includes a coupler body having a first hook, a lock member, a slidable second hook, a hydraulic cylinder, and a connecting pin connecting the cylinder and coupler body. The lock member is movable between locking and unlocking positions in which the lock member protrudes into and retracts from an opening of the first hook. The cylinder includes first and second end portions connected to the coupler body and the second hook, respectively. The cylinder extends and contracts to cause the second hook to slide away from and towards the first hook, respectively. The coupler body includes a support hole moveably supporting the connecting pin in an extension and contraction direction of the cylinder. The first end portion of the cylinder moves away from the second end portion within a movability range of the connecting pin to move the lock member from the unlocking to locking position.Type: GrantFiled: June 23, 2015Date of Patent: February 27, 2018Assignee: KOMATSU LTD.Inventors: Takuya Tsukada, Kenichi Higuchi, Akira Hashimoto, Hisao Asada, Tsuyoshi Yoshida, Daijiro Ito
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Patent number: 9733368Abstract: According to an embodiment, a neutron measurement apparatus has: a neutron detector; a preamplifier that amplifies an output signal of the neutron detector and outputs a neutron detection signal; a pulse counting unit that measures the neutron intensity by using pulse counting method by which the neutron detection signal is used to count the number of individual pulses; a Campbell measurement unit that measures the neutron intensity by using Campbell method by which a time average of squares of AC component of the neutron detection signal is calculated; a correction constant calculation unit that calculates a correction constant for correcting an output of the Campbell measurement unit by using an output of the pulse counting unit and an output of the Campbell measurement unit; and a correction value calculation unit that outputs, based on the output of the Campbell measurement unit, a corrected value by using the correction constant.Type: GrantFiled: October 29, 2015Date of Patent: August 15, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Shigehiro Kono, Daijiro Ito, Makoto Tomitaka, Tsuyoshi Kumagai, Norihiro Umemura
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Patent number: 9702987Abstract: According to an embodiment, a neutron measurement apparatus has: a neutron detector; a gamma ray detector; a neutron detector signal processing unit which performs Fourier transform on the signals received for a prescribed period, generates neutron detector signal frequency data in a frequency domain, calculates the neutron-detection signal power spectrum and stores it; a gamma-ray detector signal processing unit which performs Fourier transform on the signals received for a prescribed period, generates gamma ray detector signal frequency data in a frequency domain, calculates gamma ray detector signal power spectrum and stores it; and a neutron calculation unit which generates a neutron signal by removing a part contributed by the gamma ray detector signal power spectrum from the neutron detector signal power spectrum.Type: GrantFiled: July 13, 2016Date of Patent: July 11, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Shigehiro Kono, Daijiro Ito
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Publication number: 20170107687Abstract: An edge of a guide hole includes a first contact portion, a second contact portion, and a guide portion. The first contact portion is in contact with the second connecting pin while the second connecting pin is positioned in the lock actuation position. The second contact portion is in contact with the second connecting pin while the second connecting pin is positioned in the lock release position. The guide portion extends in a direction intersecting the movement direction of the second connecting pin between the first contact portion and the second contact portion. The guide portion is pressed by the second connecting pin that moves from the lock actuation position to the lock release position in order to resist the urging force of an urging member and cause the second lock member to move from the locked position to the unlocked position.Type: ApplicationFiled: June 23, 2015Publication date: April 20, 2017Applicant: KOMATSU LTD.Inventors: Daijiro ITO, Tsuyoshi YOSHIDA, Akira HASHIMOTO, Takuya TSUKADA, Kenichi HIGUCHI
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Publication number: 20170067223Abstract: A quick coupler includes a coupler body having a first hook, a lock member, a slidable second hook, a hydraulic cylinder, and a connecting pin connecting the cylinder and coupler body. The lock member is movable between locking and unlocking positions in which the lock member protrudes into and retracts from an opening of the first hook. The cylinder includes first and second end portions connected to the coupler body and the second hook, respectively. The cylinder extends and contracts to cause the second hook to slide away from and towards the first hook, respectively. The coupler body includes a support hole moveably supporting the connecting pin in an extension and contraction direction of the cylinder. The first end portion of the cylinder moves away from the second end portion within a movability range of the connecting pin to move the lock member from the unlocking to locking position.Type: ApplicationFiled: June 23, 2015Publication date: March 9, 2017Inventors: Takuya TSUKADA, Kenichi HIGUCHI, Akira HASHIMOTO, Hisao ASADA, Tsuyoshi YOSHIDA, Daijiro ITO
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Publication number: 20170017002Abstract: According to an embodiment, a neutron measurement apparatus has: a neutron detector; a gamma ray detector; a neutron detector signal processing unit which performs Fourier transform on the signals received for a prescribed period, generates neutron detector signal frequency data in a frequency domain, calculates the neutron-detection signal power spectrum and stores it; a gamma-ray detector signal processing unit which performs Fourier transform on the signals received for a prescribed period, generates gamma ray detector signal frequency data in a frequency domain, calculates gamma ray detector signal power spectrum and stores it; and a neutron calculation unit which generates a neutron signal by removing a part contributed by the gamma ray detector signal power spectrum from the neutron detector signal power spectrum.Type: ApplicationFiled: July 13, 2016Publication date: January 19, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Shigehiro KONO, Daijiro ITO
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Publication number: 20160180977Abstract: According to an embodiment, a neutron measurement apparatus has a neutron detector; a pre-amplifier; a first AC amplifier which extracts and amplifies an AC component; a bandwidth limiter which obtains a signal of a range of a predetermined frequency domain based on the output of the first AC amplifier; a neutron signal interval calculation unit which derives a neutron signal interval, that is a period of time during which a significant signal is being generated, from the AC component of the neutron detection signal; and a mean square value calculation unit which calculates a mean square value of outputs of the bandwidth limiter for a range corresponding to the neutron signal interval.Type: ApplicationFiled: November 30, 2015Publication date: June 23, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Daijiro ITO, Norihiro UMEMURA, Shigehiro KONO, Tsuyoshi KUMAGAI, Makoto TOMITAKA
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Publication number: 20160131775Abstract: According to an embodiment, a neutron measurement apparatus has: a neutron detector; a preamplifier that amplifies an output signal of the neutron detector and outputs a neutron detection signal; a pulse counting unit that measures the neutron intensity by using pulse counting method by which the neutron detection signal is used to count the number of individual pulses; a Campbell measurement unit that measures the neutron intensity by using Campbell method by which a time average of squares of AC component of the neutron detection signal is calculated; a correction constant calculation unit that calculates a correction constant for correcting an output of the Campbell measurement unit by using an output of the pulse counting unit and an output of the Campbell measurement unit; and a correction value calculation unit that outputs, based on the output of the Campbell measurement unit, a corrected value by using the correction constant.Type: ApplicationFiled: October 29, 2015Publication date: May 12, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Shigehiro KONO, Daijiro ITO, Makoto TOMITAKA, Tsuyoshi KUMAGAI, Norihiro UMEMURA
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Publication number: 20150348656Abstract: According to one embodiment, a neutron flux level computing component has: an analog signal processing system that amplifies an AC component of a detector output signal from a neutron detector and performs filtering for removal of a high-frequency component; a digitization system that converts, at a certain sampling period, an output signal from the analog signal processing system into a digital time-series signal; a wavelet analysis system that performs discrete wavelet transformation using the digital time-series signal to compute a wavelet coefficient; and a digital signal processing system that computes a mean square value of the wavelet coefficients and converts the computed mean square value into a neutron flux level value.Type: ApplicationFiled: February 19, 2015Publication date: December 3, 2015Applicant: Kabushiki Kaisha ToshibaInventors: Shigehiro KONO, Daijiro ITO, Hideyuki KITAZONO
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Patent number: 6991377Abstract: A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length L1 between the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L1<?D/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.Type: GrantFiled: August 13, 2003Date of Patent: January 31, 2006Assignee: Komatsu LimitedInventors: Hiroshi Yamamoto, Daijiro Ito, Takeshi Nishide
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Publication number: 20040042698Abstract: A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length L1 between the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L1<&pgr;D/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.Type: ApplicationFiled: August 13, 2003Publication date: March 4, 2004Inventors: Hiroshi Yamamoto, Daijiro Ito, Takeshi Nishide
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Patent number: 5715168Abstract: An auto-handler system is constructed by a supply device, a measurement device and a storage device, through which a carrier circulates. A plurality of IC sockets are arranged on the carrier; and an identification mark, such as a bar-code mark, is attached to the carrier. The supply device supplies ICs to the carrier in accordance with the identification mark so that the ICs are mounted respectively on the IC sockets. The carrier is transported to the measurement device wherein measurement is performed on the ICs. After the measurement, the carrier is transported to the storage device wherein the ICs are removed and classified storage is performed on the ICs. Thereafter, a vacant carrier is returned to the supply device. If defective decision is made on the carrier based on result of measurement, the measurement device creates defective information representing position of an defective IC socket of the carrier.Type: GrantFiled: November 28, 1995Date of Patent: February 3, 1998Assignee: Ando Electric Co., Ltd.Inventor: Daijiro Ito
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Patent number: 5317871Abstract: A closed center-load sensing system, capable of varying a pump discharge volume easily and with a high degree of accuracy, includes a power source having an indicator for indicating a rotational speed, a variable volume hydraulic pump driven by the power source, actuators driven by pressure oil discharged from the variable volume hydraulic pump, change-over valves for controlling the flow of the pressure oil, an indicator for setting the rotational speed of the power source in a load sensing system in which the pressure difference between the pump pressure and the actuator load pressure is maintained at a predetermined pressure and the rate of flow of a discharge from the variable capacity hydraulic pump is varied when the pressure difference between a pump pressure and an actuator load pressure varies, a controller for computing and outputting a command signal for the rotational speed of the power source in response to a command signal from the indicator, and an electronic proportional control governor for cType: GrantFiled: March 26, 1993Date of Patent: June 7, 1994Assignee: Kabushiki Kaisha Komatsu SeisakushoInventors: Daijiro Ito, Hiroshi Imai