Patents by Inventor Shigeki Tokita
Shigeki Tokita 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: 20230114481Abstract: A work machine includes: an informing device that informs an operator; an input device for inputting predetermined information; a notification device that gives a notification to a worker around the work machine; a controller; and a communication device that communicates with a mobile terminal carried by the worker.Type: ApplicationFiled: May 26, 2021Publication date: April 13, 2023Inventors: Kazushige KUROKAMI, Takaaki ISHII, Shigeki TOKITA, Hiroshi SAKAMOTO, Yoshiyuki TSUCHIE
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Patent number: 11447934Abstract: The line-of-sight direction of an operator is estimated on the basis of the posture of a front work device detected by a posture sensor, and plural display regions are set on a screen of a transparent display on the basis of the estimated line-of-sight direction of the operator. Then, the display position of a display image is calculated in such a manner that the display position is located in the display region corresponding to the kind of the display image in the set plural display regions.Type: GrantFiled: February 4, 2020Date of Patent: September 20, 2022Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Kazushige Kurokami, Shigeki Tokita, Hiroshi Sakamoto
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Publication number: 20220049476Abstract: The line-of-sight direction of an operator is estimated on the basis of the posture of a front work device detected by a posture sensor, and plural display regions are set on a screen of a transparent display on the basis of the estimated line-of-sight direction of the operator. Then, the display position of a display image is calculated in such a manner that the display position is located in the display region corresponding to the kind of the display image in the set plural display regions.Type: ApplicationFiled: February 4, 2020Publication date: February 17, 2022Inventors: Kazushige KUROKAMI, Shigeki TOKITA, Hiroshi SAKAMOTO
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Patent number: 11225777Abstract: A mode selecting device configured to select a work mode of a hydraulic excavator, a work determining section configured to determine whether work contents of the hydraulic excavator are work contents other than those of the selected work mode on the basis of a detection result of pilot pressure sensors, a minimum alarm region determining section configured to determine one of a plurality of minimum alarm regions preset on the periphery of the hydraulic excavator on the basis of a selection result of the mode selecting device and a determination result of the work determining section, and an alarm determining section configured to output an alarm signal to a buzzer when the relative position of an obstacle, the relative position being computed by an obstacle position calculating section, is inside an alarm region set so as to include the minimum alarm region determined by the minimum alarm region determining section.Type: GrantFiled: March 14, 2018Date of Patent: January 18, 2022Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Kazushige Kurokami, Hiroshi Sakamoto, Shigeki Tokita
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Publication number: 20200277757Abstract: A mode selecting device configured to select a work mode of a hydraulic excavator, a work determining section configured to determine whether work contents of the hydraulic excavator are work contents other than those of the selected work mode on the basis of a detection result of pilot pressure sensors, a minimum alarm region determining section configured to determine one of a plurality of minimum alarm regions preset on the periphery of the hydraulic excavator on the basis of a selection result of the mode selecting device and a determination result of the work determining section, and an alarm determining section configured to output an alarm signal to a buzzer when the relative position of an obstacle, the relative position being computed by an obstacle position calculating section, is inside an alarm region set so as to include the minimum alarm region determined by the minimum alarm region determining section.Type: ApplicationFiled: March 14, 2018Publication date: September 3, 2020Inventors: Kazushige KUROKAMI, Hiroshi SAKAMOTO, Shigeki TOKITA
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Patent number: 9935419Abstract: In an optical fiber device having a configuration in which an optical fiber is joined to a side surface of another optical fiber, a joint portion is suppressed from reaching a high temperature. The optical fiber device includes a first fluoride fiber, a second fluoride fiber, and a heat dissipation member. The first fluoride fiber guides light. The second fluoride fiber has a first end on or from which light is incident or output and a second end at which an end surface of the second fluoride fiber is obliquely joined to a side surface of the first fluoride fiber.Type: GrantFiled: July 24, 2015Date of Patent: April 3, 2018Assignees: MITSUBOSHI DIAMOND INDUSTRIAL CO., LTD., OSAKA UNIVERSITYInventors: Masanao Murakami, Christian Schaefer, Satoshi Hattori, Takahisa Hayashi, Seiji Shimizu, Shigeki Tokita
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Publication number: 20170256903Abstract: In an optical fiber device having a configuration in which an optical fiber is joined to a side surface of another optical fiber, a joint portion is suppressed from reaching a high temperature. The optical fiber device includes a first fluoride fiber, a second fluoride fiber, and a heat dissipation member. The first fluoride fiber guides light. The second fluoride fiber has a first end on or from which light is incident or output and a second end at which an end surface of the second fluoride fiber is obliquely joined to a side surface of the first fluoride fiber.Type: ApplicationFiled: July 24, 2015Publication date: September 7, 2017Inventors: Masanao MURAKAMI, Christian SCHAEFER, Satoshi HATTORI, Takahisa HAYASHI, Seiji SHIMIZU, Shigeki TOKITA
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Patent number: 8633438Abstract: An ultrafast electron diffraction device for irradiating a sample with a bunch of electrons in an ultrashort pulse in order to perform an ultrafast analysis of the sample. The ultrafast electron diffraction device includes: a) a laser emitter for delivering an ultrashort pulse laser having a pulse width of not more than 1 ps onto a target which is a material for generating electrons at an intensity of not less than 1017 W/cm2; and b) a pulse compressor for rotating, in a magnetostatic field, a bunch of electrons generated from the target onto which the ultrashort pulse laser has been delivered so as to suppress the spread of the bunch of electrons in their traveling direction. The pulse compressor is composed of an entrance-side parallel-plate static magnet, one end of which is placed on the course of the bunch of electrons, and an exit-side parallel-plate static magnet.Type: GrantFiled: January 25, 2011Date of Patent: January 21, 2014Assignee: Kyoto UniversityInventors: Shigeki Tokita, Masaki Hashida, Shuji Sakabe
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Patent number: 8451531Abstract: A light amplifier includes first and second multi-pass amplifiers, an excitation light source, and a beam splitter. The second multi-pass amplifier includes a light attenuation portion provided in an optical path for a light pulse to travel to pass through a light amplification medium a plurality of times, for attenuating energy of the input light pulse. In addition, an excitation light pulse from the excitation light source is split by the beam splitter into two light pulses. These two pulses are input to the first and second multi-pass amplifiers, respectively. Thus, fluctuation in energy of the light pulse output from the light amplifier can be less than fluctuation in energy of the excitation light pulse.Type: GrantFiled: January 13, 2009Date of Patent: May 28, 2013Assignee: Kyoto UniversityInventors: Shigeki Tokita, Masaki Hashida, Shuji Sakabe
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Publication number: 20120312987Abstract: An ultrafast electron diffraction device for irradiating a sample with a bunch of electrons in an ultrashort pulse in order to perform an ultrafast analysis of the sample. The ultrafast electron diffraction device includes: a) a laser emitter for delivering an ultrashort pulse laser having a pulse width of not more than 1 ps onto a target which is a material for generating electrons at an intensity of not less than 1017 W/cm2; and b) a pulse compressor for rotating, in a magnetostatic field, a bunch of electrons generated from the target onto which the ultrashort pulse laser has been delivered so as to suppress the spread of the bunch of electrons in their traveling direction. The pulse compressor is composed of an entrance-side parallel-plate static magnet, one end of which is placed on the course of the bunch of electrons, and an exit-side parallel-plate static magnet.Type: ApplicationFiled: January 25, 2011Publication date: December 13, 2012Applicant: KYOTO UNIVERSITYInventors: Shigeki Tokita, Masaki Hashida, Shuji Sakabe
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Publication number: 20100290108Abstract: A light amplifier includes first and second multi-pass amplifiers, an excitation light source, and a beam splitter. The second multi-pass amplifier includes a light attenuation portion provided in an optical path for a light pulse to travel to pass through a light amplification medium a plurality of times, for attenuating energy of the input light pulse. In addition, an excitation light pulse from the excitation light source is split by the beam splitter into two light pulses. These two pulses are input to the first and second multi-pass amplifiers, respectively. Thus, fluctuation in energy of the light pulse output from the light amplifier can be less than fluctuation in energy of the excitation light pulse.Type: ApplicationFiled: January 13, 2009Publication date: November 18, 2010Applicant: Kyoto UniversityInventors: Shigeki Tokita, Masaki Hashida, Shuji Sakabe
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Patent number: 7653100Abstract: The present invention relates to a solid-state laser module, and so on, having a structure for enabling optical output of high quality to be obtained. The solid-state laser module includes a vacuum container with windows, and a heat sink, a solid-state laser medium, and a pair of transparent members are housed in the vacuum container in an integrally assembled state. The solid-state laser medium and the pair of transparent members respectively have disk shapes, and the pair of transparent members sandwich the solid-state laser medium. The thermal conductivity of each of the pair of transparent members is higher than the thermal conductivity of the solid-state laser medium.Type: GrantFiled: November 24, 2005Date of Patent: January 26, 2010Assignees: Osaka University, Hamamatsu Photonics K.K.Inventors: Yasukazu Izawa, Masayuki Fujita, Shigeki Tokita, Tadashi Ikegawa, Toshiyuki Kawashima, Hirofumi Kan
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Publication number: 20080089372Abstract: A solid laser module etc. having a structure that enables to obtain a high-quality light output. The solid laser module has a vacuum container with a window, and a heat sink, a solid laser medium, and a pair of transparent members are received in an integrally assembled state in the container. The solid laser medium and the pair of transparent members are each formed in a disc shape, and the solid laser medium is sandwiched between the pair of transparent members. The thermal conductivity of each of the pair of transparent members is higher than the thermal conductivity of the solid laser medium. The heat sink is shaped to simultaneously hold portions of the pair of transparent members that hold the solid laser medium in between. A heat insulation region having a lower thermal conductivity than the solid laser medium is provided between the heat sink and the solid laser medium.Type: ApplicationFiled: November 24, 2005Publication date: April 17, 2008Applicants: OSAKA UNIVERSITY, HAMAMATSU PHOTONICS K.K.Inventors: Yasukazu Izawa, Masayuki Fujita, Shigeki Tokita, Tadashi Ikegawa, Toshiyuki Kawashima, Hirofumi Kan
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Patent number: 5484490Abstract: A P-type thermoelectric material consists essentially of iron disilicide, metallic manganese and metallic aluminium dissolved in or alloyed with the iron disilicide, and silicon oxide and/or aluminum oxide present in the iron disilicide. The manganese is contained in an amount of from 1.67 to 4.1 atomic % with respect to a sum of atoms of iron and silicon constituting the iron disilicide, the metallic manganese and the metallic aluminum taken as 100 atomic %, and the metallic aluminum contained in an amount of from 1.33 to 3.33 atomic % with respect thereto, and a sum of the metallic manganese and the metallic aluminum in an amount of from 4.0 to 5.34 atomic % with respect thereto. The P-type thermoelectric material having such a composition produces a thermoelectromotive force equal to or greater than those of the conventional P-type thermoelectric materials comprised of iron disilicide, and it exhibits a mean resistivity equal to or smaller than that of the N-type thermoelectric material.Type: GrantFiled: February 23, 1994Date of Patent: January 16, 1996Assignees: Technova Inc., National Research Institute for MetalsInventors: Shigeki Tokita, Makoto Okabayashi, Takashi Amano, Isao Nishida
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Patent number: D561689Type: GrantFiled: June 7, 2006Date of Patent: February 12, 2008Assignee: Nakamura Scientific Co., Ltd.Inventors: Hisayoshi Nakamura, Shigeki Tokita
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Patent number: D859448Type: GrantFiled: February 28, 2018Date of Patent: September 10, 2019Assignees: Hitachi Construction Machinery Co., Ltd., KCM CorporationInventors: Shunya Kokubo, Tomohiro Ueda, Takaaki Ishii, Masaki Yoshikawa, Keiichirou Nakamura, Hiroshi Sakamoto, Shigeki Tokita
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Patent number: D890200Type: GrantFiled: October 3, 2018Date of Patent: July 14, 2020Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shunya Kokubo, Takaaki Ishii, Yuuichi Kurosawa, Tadahiro Yamaguchi, Hiroyuki Azuma, Keiichirou Nakamura, Hiroshi Sakamoto, Shigeki Tokita
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Patent number: D892835Type: GrantFiled: October 3, 2018Date of Patent: August 11, 2020Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shunya Kokubo, Takaaki Ishii, Yuuichi Kurosawa, Tadahiro Yamaguchi, Hiroyuki Azuma, Keiichirou Nakamura, Hiroshi Sakamoto, Shigeki Tokita