Patents by Inventor Toshiaki Sakai
Toshiaki Sakai 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: 20250022676Abstract: An electron beam device includes a Schottky emitter that is capable of reproducing collapse of a shape of a facet in a short time without adding hardware. Also, a method of operating a Schottky emitter includes applying a first electric field to the Schottky emitter while heating the Schottky emitter at a first temperature, and then applying a second electric field to the Schottky emitter while heating the Schottky emitter at a second temperature. The first temperature is higher than an operation temperature of the Schottky emitter and the second temperature. The first electric field is equal to or higher than an operation electric field of the Schottky emitter and lower than the second electric field. The second temperature is equal to or higher than the operation temperature and lower than the first temperature. The second electric field is higher than the operation electric field and the first electric field.Type: ApplicationFiled: May 21, 2024Publication date: January 16, 2025Inventors: Toshiaki KUSUNOKI, Masahiro FUKUTA, Yusuke SAKAI, Soichiro MATSUNAGA, Tomoya IGARI
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Publication number: 20240326161Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.Type: ApplicationFiled: June 14, 2024Publication date: October 3, 2024Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
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Patent number: 12036624Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.Type: GrantFiled: September 3, 2019Date of Patent: July 16, 2024Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Tomomichi Yasuoka, Takashi Kayahara, Toshiaki Sakai, Ryosuke Nishii, Takashi Shigematsu
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Publication number: 20240015268Abstract: A display device is used for a number-of-fish counting system for counting the number of fish. The display device is provided with a display unit that displays a plurality of selectable instruction items on a main screen. The plurality of instruction items include a recording instruction item that instructs a processing device of the number-of-fish counting system to execute or stop recording of video of fish, and an analysis instruction item that instructs the processing device to count the number of the fish by analyzing the fish on the basis of the recorded video.Type: ApplicationFiled: October 27, 2021Publication date: January 11, 2024Applicant: Yanmar Holdings Co., Ltd.Inventors: Isao WAKABAYASHI, Yulchiro DAKE, Yasushiro UEDA, Toshiaki SAKAI
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Publication number: 20230311243Abstract: A laser welding method includes: forming a molten weld pool by emitting laser light including a main power region and a sub-power region onto a workpiece, the main power region including at least one main beam, the sub-power region including at least one sub-beam having a lower power density than power density of the main beam; and solidifying the molten weld pool. The sub-beam is emitted onto the workpiece such that a void formed inside the molten weld pool escapes to outside of the molten weld pool before the molten weld pool becomes solidified.Type: ApplicationFiled: April 17, 2023Publication date: October 5, 2023Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Nobuyasu MATSUMOTO, Tomomichi YASUOKA, Sayo SUGA, Toshiaki SAKAI, Masamitsu KANEKO, Takashi SHIGEMATSU, Kazuyuki UMENO, Jun TERADA
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Publication number: 20230150057Abstract: A laser cutting method for metal foil includes: cutting a processing target by laser by intermittently applying a pulse of laser beam to a surface of a metal foil serving as the processing target at a frequency of 1 [MHz] or less.Type: ApplicationFiled: January 18, 2023Publication date: May 18, 2023Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Keigo MATSUNAGA, Taro MURAYAMA, Toshiaki SAKAI, Takashi KAYAHARA, Takashi SHIGEMATSU
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Publication number: 20230101343Abstract: A welding method includes: irradiating a plurality of metal foils stacked on a first surface of a metal member in a first direction with laser light to weld the metal member and the plurality of metal foils to each other, the laser light including first laser light having a wavelength of 800 [nm] or more and 1200 [nm] or less and second laser light having a wavelength of 550 [nm] or less, a second surface of a metal foil farthest from the metal member in the first direction among the plurality of metal foils, on a side opposite to the metal member, being irradiated with the laser light.Type: ApplicationFiled: December 1, 2022Publication date: March 30, 2023Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Nobuyasu MATSUMOTO, Fumika NISHINO, Masamitsu KANEKO, Kazuyuki UMENO, Jun TERADA, Daeyoul YOON, Tomomichi YASUOKA, Sayo SUGA, Toshiaki SAKAI
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Publication number: 20230023739Abstract: A welding method includes: emitting a laser beam to a workpiece including a metal; and welding a portion of the workpiece to which the laser beam is emitted by melting. The laser beam includes a main power region and at least one auxiliary power region, power in the main power region is equal to or higher than power in each of the at least one auxiliary power region, and a power ratio of the power in the main power region and a total of the power in the at least one auxiliary power region is within a range of 144:1 to 1:1.Type: ApplicationFiled: September 23, 2022Publication date: January 26, 2023Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Takashi SHIGEMATSU, Toshiaki SAKAI
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Publication number: 20220386571Abstract: A fish counting system has: an image acquisition unit for acquiring a plurality of images wherein a fluid containing fish is imaged over time; a counting unit for counting the fish on the basis of the plurality of images; a fish count change display provision unit for providing a fish count change display, wherein a display corresponding to the number of fish counted per unit time is arranged in a time-series manner; a result provision unit for providing a counting result display wherein an image to which count completion marks indicating a counted fish have been added; and a correction unit for receiving a correction operation and correcting the number of fish.Type: ApplicationFiled: September 15, 2020Publication date: December 8, 2022Applicant: Yanmar Power Technology Co., Ltd.Inventors: Yasuhiro UEDA, Yuichiro DAKE, Toshiaki SAKAI, Makoto TANI
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Publication number: 20220354096Abstract: This fish counting system comprises: an image acquisition unit configured to acquire a plurality of images obtained by capturing, over time, images of a photographing area in which a fluid including a fish flows; an extraction unit configured to extract a fish in each image; and a counting unit configured to count the number of fish. The photographing area has a first area and a second area. The counting unit is configured to count the fish when the fish in the first area moves to the second area.Type: ApplicationFiled: September 15, 2020Publication date: November 10, 2022Applicant: Yanmar Power Technology Co., Ltd.Inventors: Yuichiro DAKE, Yasuhiro UEDA, Isao WAKABAYASHI, Toshiaki SAKAI, Makoto TANI
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Publication number: 20210170527Abstract: A welding method includes a step of, while irradiating laser beam toward a workpiece, relatively moving the laser beam and the workpiece and, while sweeping the laser beam on the workpiece, melting the workpiece in an irradiated portion to perform welding. Further, the laser beam is configured by a main power region and a sub-power region, at least a part of the sub-power region is present on a sweeping direction side of the main power region, a power density of the main power region is equal to or higher than a power density of the sub-power region, and the power density of the main power region is at least power density that can generate a keyhole.Type: ApplicationFiled: February 19, 2021Publication date: June 10, 2021Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
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Publication number: 20210031301Abstract: A welding method includes: arranging a workpiece containing copper in a region to be irradiated with laser light; and irradiating the workpiece with the laser light to melt and weld an irradiated portion of the workpiece. Further, the laser light is formed of a main beam and a plurality of sub beams, and a ratio of power of the main beam to total power of the plurality of sub beams is 72:1 to 3:7.Type: ApplicationFiled: October 9, 2020Publication date: February 4, 2021Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
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Publication number: 20200384574Abstract: A welding method includes: forming a workpiece by stacking plated sheet members having a plating layer formed on a surface of a base material; disposing the workpiece in an area to be irradiated with laser light; irradiating a surface of the workpiece with a plurality of beams by dispersing positions such that centers of the beams do not overlap with each other within a prescribed area on the surface; while continuing the irradiation, relatively moving the beams and the workpiece and sweeping the beams on the workpiece so as to melt an irradiated part of the workpiece for performing welding; and setting a distance between the beams to be emitted such that weld pools formed in the workpiece by irradiation of each of the beams overlap with each other.Type: ApplicationFiled: August 26, 2020Publication date: December 10, 2020Applicant: FURUKAWA ELECTRONIC CO, LTD.Inventors: Ryosuke NISHII, Takashi KAYAHARA, Toshiaki SAKAI, Tomomichi YASUOKA, Takashi SHIGEMATSU
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Publication number: 20190389001Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.Type: ApplicationFiled: September 3, 2019Publication date: December 26, 2019Applicant: FURUKAWA ELECTRIC CO., LTD.Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
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Patent number: 10026582Abstract: In order to provide a thermionic emission filament capable of ensuring a long life and improving an analysis accuracy of a mass spectrometer using the thermionic emission filament, in the thermionic emission filament including a core member through which electric current flows and an electron emitting layer which is formed so as to cover a surface of the core member, the electron emitting layer is configured to have denseness for substantial gas-tight integrity.Type: GrantFiled: December 7, 2016Date of Patent: July 17, 2018Assignee: HORIBA STEC, CO., LTD.Inventors: Kohei Sasai, Toshihiro Ikeyama, Toshiaki Sakai
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Publication number: 20170169981Abstract: In order to provide a thermionic emission filament capable of ensuring a long life and improving an analysis accuracy of a mass spectrometer using the thermionic emission filament, in the thermionic emission filament including a core member through which electric current flows and an electron emitting layer which is formed so as to cover a surface of the core member, the electron emitting layer is configured to have denseness for substantial gas-tight integrity.Type: ApplicationFiled: December 7, 2016Publication date: June 15, 2017Applicant: HORIBA STEC, CO., LTD.Inventors: Kohei SASAI, Toshihiro IKEYAMA, Toshiaki SAKAI
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Patent number: 7441748Abstract: A hoisting and pulling device has a frame body (13) made by integrally forming a speed reducer side frame (13b) on an outer peripheral edge surface of the frame body, a drive side frame (13a) on the outer peripheral edge surface of the frame body, and a frame connection section (16) on the outer periphery of a load sheave receiving section. The speed reducer side frame (13b) rotatably supports a speed reducer gear (3) and has a speed reducer side cover installation section (15b). The drive side frame (13a) has a drive side cover installation section (15a). The frame connection section (16) has guide grooves (22a, 22b) for guiding a chain (11) run around the load shave. Both frames (13a, 13b) have hook installation holes (24) for rotatably supporting a hook for suspending a body frame on the load side. The structure above reduces the number of parts and assembling man-hour and makes the structure simpler, reducing the size and costs.Type: GrantFiled: September 16, 2004Date of Patent: October 28, 2008Assignee: Kito CorporationInventors: Toshiaki Sakai, Desheng Xia
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Patent number: 7401765Abstract: A winching and drawing machine comprises a drive shaft for driving a load sheave, a pressure receiving member fitted onto the drive shaft, brake plates installed in contact with the pressure receiving member and fitted onto the drive shaft, a pawl wheel interposed between the brake plates, a drive member screwed on the drive shaft so as to be pressed to and separated from the brake plates, an idler spring installed between the drive shaft and the drive member, and a lever. A stopper engaging with the drive shaft is provided at an end face of the drive member and an idler grip is fixed on an outer face of the stopper 7. Lever latching structure at a drive-shaft end of the winching and drawing machine has a function of adjusting a chain length.Type: GrantFiled: January 14, 2003Date of Patent: July 22, 2008Assignee: Kito CorporationInventors: Desheng Xia, Takayoshi Nakamura, Toshiaki Sakai, Tsukasa Yamaguchi
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Publication number: 20080105858Abstract: A hoisting and pulling device has a frame body (13) made by integrally forming a speed reducer side frame (13b) on an outer peripheral edge surface of the frame body, a drive side frame (13a) on the outer peripheral edge surface of the frame body, and a frame connection section (16) on the outer periphery of a load sheave receiving section. The speed reducer side frame (13b) rotatably supports a speed reducer gear (3) and has a speed reducer side cover installation section (15b). The drive side frame (13a) has a drive side cover installation section (15a). The frame connection section (16) has guide grooves (22a, 22b) for guiding a chain (11) run around the load shave. Both frames (13a, 13b) have hook installation holes (24) for rotatably supporting a hook for suspending a body frame on the load side. The structure above reduces the number of parts and assembling man-hour and makes the structure simpler, reducing the size and costs.Type: ApplicationFiled: September 16, 2004Publication date: May 8, 2008Applicant: KITO CORPORATIONInventors: Toshiaki Sakai, Desheng Xia
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Patent number: 7163753Abstract: An arc-resistant terminal, couple, and connecter are provided. In an embodiment, a metal-based electrical contact portion thereof includes at least one of Cu, Ni or Sn, and not more than 0.06 mass % P, wherein the arc-resistant terminal capable of suppressing arc discharge wherein a voltage between the arc-resistant terminal and a second terminal immediately after separation thereof is DC36V to 60V and a current between terminals during contact is 6A to 30A. In another embodiment, the an electrical contact portion comprising at least 80 mass % of metal having a boiling point of not less than 1000 degrees centigrade. According to the present invention, since the electrical contact portion or the final contact portion of the terminal includes a specific metal-based material, even when the voltage applied between the terminals is increased and an arc discharge is liable to be generated, the arc discharge can be suppressed.Type: GrantFiled: April 15, 2003Date of Patent: January 16, 2007Assignees: Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd., Autonetworks Technologies, Ltd.Inventors: Kouji Ota, Hiroki Hirai, Yoshitugu Tsuji, Masahiro Shibata, Atsushi Kimura, Toshiaki Sakai, Satoshi Takano, Masahiko Kanda, Narito Yagi