Patents by Inventor Masayuki Okamura
Masayuki Okamura 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: 20240364097Abstract: An electric work machine according to the present disclosure includes: a motor; and a first control circuit. The first control circuit increases a first counter on the basis of the acquired or estimated line current value being greater than a current threshold. The first control circuit decreases the first counter on the basis of the calculated rotational speed being greater than a speed threshold. The first control circuit stops the motor on the basis of the first counter exceeding a first threshold.Type: ApplicationFiled: April 17, 2024Publication date: October 31, 2024Applicant: MAKITA CORPORATIONInventors: Kazuaki USAMI, Masayuki OKAMURA, Dai SUZUKI, Kouichi TAKEDA
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Publication number: 20230336105Abstract: An electric working machine in one aspect of the present disclosure calculates an estimated heat value based on an electric current value and a parameter. The estimated heat value corresponds to an estimated heat generation amount of a motor. The electric current value corresponds to a magnitude of an electric current delivered from a power source to the motor. The electric work machine varies the parameter based on a load time. The load time corresponds to a time period during which a first load is continuously imposed on the motor. The first load has a specified magnitude or more. The electric work machine performs a protective operation for over temperature protection of the motor based on the estimated heat value having reached a heat threshold.Type: ApplicationFiled: April 13, 2023Publication date: October 19, 2023Applicant: MAKITA CORPORATIONInventors: Dai SUZUKI, Masayuki OKAMURA, Itsuku KATO
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Publication number: 20230115229Abstract: An electric work machine includes a first and second motors; a first and second switches disposed on corresponding current conduction path from a direct-current power source to each motor; a first and second carrier frequency setting devices; and a controller. The first and second carrier frequency setting devices respectively set a first and second carrier frequencies of a time when PWM controlling an electric power supply to the first and second motors. The first and second carrier frequencies are different from each other. The controller drives the first switch or the second switch by using a PWM signal generated at the first or second carrier frequency and PWM controls an electric power supply to the first or second motor.Type: ApplicationFiled: October 5, 2022Publication date: April 13, 2023Applicant: MAKITA CORPORATIONInventors: Masayuki OKAMURA, Kazuya OKUMA
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Publication number: 20220371112Abstract: An electric work machine in one aspect of the present disclosure includes a motor, a manual switch, and a control circuit. The control circuit switches a preset control either to be enabled or disabled. During the preset control being enabled, the control circuit (i) varies an actual rotational speed of the motor in accordance with an actual moved distance of the manual switch and (ii) increases the actual rotational speed in response to a load being imposed on the motor. During the preset control being disabled, the control circuit varies the actual rotational speed in accordance with the actual moved distance of the manual switch in a manner at least partly distinctive from a variation in the actual rotational speed during the preset control being enabled.Type: ApplicationFiled: May 23, 2022Publication date: November 24, 2022Applicant: MAKITA CORPORATIONInventors: Masayuki OKAMURA, Takuya KUSAKAWA, Itsuku KATO
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Patent number: 11418686Abstract: An imaging module includes: a substrate on which an imaging element is mounted and in which a through-hole is formed; a holding section that has a support pin inserted into the through-hole in such a manner that the support pin penetrates the through-hole and that holds an optical system forming a subject image on the imaging element; and an adhesive that is provided in the through-hole and that fixes the substrate to the support pin, and at least a tip end portion of the support pin has a tapered shape from a root side of the support pin toward a tip end of the support pin.Type: GrantFiled: April 13, 2017Date of Patent: August 16, 2022Assignee: HITACHI ASTEMO, LTD.Inventors: Masayuki Okamura, Akihiro Yamaguchi, Chiemi Kubota, Hidenori Shinohara, Kenichi Takeuchi
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Publication number: 20210227108Abstract: An imaging module includes: a substrate on which an imaging element is mounted and in which a through-hole is formed; a holding section that has a support pin inserted into the through-hole in such a manner that the support pin penetrates the through-hole and that holds an optical system forming a subject image on the imaging element; and an adhesive that is provided in the through-hole and that fixes the substrate to the support pin, and at least a tip end portion of the support pin has a tapered shape from a root side of the support pin toward a tip end of the support pin.Type: ApplicationFiled: April 13, 2017Publication date: July 22, 2021Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Masayuki OKAMURA, Akihiro YAMAGUCHI, Chiemi KUBOTA, Hidenori SHINOHARA, Kenichi TAKEUCHI
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Patent number: 10850681Abstract: To provide a technique of eliminating condensation adhering to a vehicle inner side of the glass to improve the reliability of a vehicle-mounted optical device. A vehicle-mounted optical device includes: an imaging unit that captures an outside of a vehicle through glass mounted to the vehicle to obtain an image; a condensation detection unit that detects condensation of the glass by determining whether an image in a predetermined range of a part of the image is in a predetermined state; and a condensation removal device control processing unit that actuates a condensation removal device which removes condensation of the glass when the condensation detection unit detects the condensation.Type: GrantFiled: March 2, 2017Date of Patent: December 1, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Chiemi Kubota, Masayuki Okamura, Akihiro Yamaguchi, Hidenori Shinohara, Kenichi Takeuchi
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Patent number: 10371369Abstract: An optical module having a high-moisture-proof package structure in which dew condensation does not occur is provided. An optical module includes optical components including a light source, a pedestal on which the optical components are mounted, a cover which is combined to the pedestal to seal the optical components, and an emitting window disposed in the cover to take light from the light source outside. The pedestal and the cover are sealed with an O ring and a liquid seal material such that a compression direction of the O ring and a compression direction of the liquid seal material are almost perpendicular to each other.Type: GrantFiled: July 10, 2015Date of Patent: August 6, 2019Assignee: HITACHI-LG DATA STORAGE, INC.Inventors: Yukio Sakigawa, Masayuki Okamura, Hiroaki Furuichi, Hiroshi Ogasawara, Kenji Watabe, Fumihito Ichikawa, Tatsuya Yamasaki
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Publication number: 20190202373Abstract: To provide a technique of eliminating condensation adhering to a vehicle inner side of the glass to improve the reliability of a vehicle-mounted optical device. A vehicle-mounted optical device includes: an imaging unit that captures an outside of a vehicle through glass mounted to the vehicle to obtain an image; a condensation detection unit that detects condensation of the glass by determining whether an image in a predetermined range of a part of the image is in a predetermined state; and a condensation removal device control processing unit that actuates a condensation removal device which removes condensation of the glass when the condensation detection unit detects the condensation.Type: ApplicationFiled: March 2, 2017Publication date: July 4, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Chiemi KUBOTA, Masayuki OKAMURA, Akihiro YAMAGUCHI, Hidenori SHINOHARA, Kenichi TAKEUCHI
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Publication number: 20160033122Abstract: An optical module having a high-moisture-proof package structure in which dew condensation does not occur is provided. An optical module includes optical components including a light source, a pedestal on which the optical components are mounted, a cover which is combined to the pedestal to seal the optical components, and an emitting window disposed in the cover to take light from the light source outside. The pedestal and the cover are sealed with an O ring and a liquid seal material such that a compression direction of the O ring and a compression direction of the liquid seal material are almost perpendicular to each other.Type: ApplicationFiled: July 10, 2015Publication date: February 4, 2016Inventors: Yukio SAKIGAWA, Masayuki OKAMURA, Hiroaki FURUICHI, Hiroshi OGASAWARA, Kenji WATABE, Fumihito ICHIKAWA, Tatsuya YAMASAKI
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Publication number: 20140234596Abstract: An adhesive structure of an optical component includes a horizontal surface and a vertical surface. In a structure in which an optical component is adhered to a chassis having the horizontal surface and the vertical surface, an adhesive force per unit area of the vertical surface is higher than that per unit area of the horizontal surface.Type: ApplicationFiled: November 8, 2013Publication date: August 21, 2014Applicant: Hitachi Media Electronics Co., Ltd.Inventors: Masayuki OKAMURA, Hiroaki FURUICHI, Teppei TANAKA, Masahiko KAMESAWA, Hitoshi SUGAWARA
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Patent number: 8400889Abstract: There is provided a low-cost and reliable optical pickup device, wherein an objective lens is in contact with an adhesive at least one or more portions and fixed to the adhesive and also the height of the adhesive for fixing the objective lens is higher than the surface of the objective lens or the end of the objective lens, thereby a sufficient adhesive strength is secured between the objective lens and a member to which the objective lens is adhered and further this adhesive serves also as a disc protector.Type: GrantFiled: April 22, 2010Date of Patent: March 19, 2013Assignee: Hitachi Media Electronics Co., Ltd.Inventors: Masayuki Okamura, Akiko Mizushima, Hidenao Saito, Jun Hato, Kazumi Takahashi
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Patent number: 8118158Abstract: A sealed storage bag of multiple compartment structure, wherein a separated condition of compartments is needed until just before the use, such as an infusion bag of a mixing type of two kinds of liquid or a bag for cooked storage food with flavoring materials. A sealed storage bag comprises a flexible outer bag; an inner bag as a rectangular small compartment having an inner storage space, which is separated, by a film member, from an outer storage space in the outer bag; a filling port for filling contents; and a discharge port for discharging the contents.Type: GrantFiled: November 28, 2006Date of Patent: February 21, 2012Assignee: Ajinomoto Co., Inc.Inventors: Shoji Igota, Masayuki Okamura
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Publication number: 20110051588Abstract: An adhesive agent, which contains a light starting agent and is cured by light, is added with fillers in which the difference in refractive indices between the adhesive agent and the fillers is not larger than ±0.02. Even if the adhesive agent is added with functional fillers, this addition method allows the suppression of a lowering in the light penetrability of the adhesive agent. As a result, it becomes possible to suppress the uncuring and shrinkage of the photo-curing type adhesive agent and to perform the bonding of components with high accuracy.Type: ApplicationFiled: April 22, 2010Publication date: March 3, 2011Inventors: Masayuki Okamura, Seiichi Kato
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Patent number: 7873970Abstract: The present invention provides an optical pickup device employing a disc protector that includes a plurality of first protrusions and at least one second protrusion disposed on the lens holder, wherein the first protrusions are formed by applying a first adhesive to a plurality of areas of a top surface of the lens holder, wherein the first protrusions are arranged at different locations in the tracking direction such that the objective lens is sandwiched between the first protrusions, wherein the at least one second protrusion protrudes is formed by applying a second adhesive to at least one area of the top surface of the lens holder, and wherein tips of the first protrusions are closer to the optical disc than a tip of the at least one second protrusion.Type: GrantFiled: July 30, 2007Date of Patent: January 18, 2011Assignee: Hitachi Media Electronics Co., Ltd.Inventors: Satoshi Arai, Hiroaki Furuichi, Yoshio Oozeki, Rika Nomura, Masayuki Okamura, Kazumi Takahashi, Mitsuo Satake
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Publication number: 20100322061Abstract: There is provided a low-cost and reliable optical pickup device, wherein an objective lens is in contact with an adhesive at least one or more portions and fixed to the adhesive and also the height of the adhesive for fixing the objective lens is higher than the surface of the objective lens or the end of the objective lens, thereby a sufficient adhesive strength is secured between the objective lens and a member to which the objective lens is adhered and further this adhesive serves also as a disc protector.Type: ApplicationFiled: April 22, 2010Publication date: December 23, 2010Inventors: Masayuki Okamura, Akiko Mizushima, Hidenao Saito, Jun Hato, Kazumi Takahashi
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Publication number: 20080052734Abstract: The present invention provides an optical pickup device employing a disc protector that includes a plurality of first protrusions and at least one second protrusion disposed on the lens holder, wherein the first protrusions are formed by applying a first adhesive to a plurality of areas of a top surface of the lens holder, wherein the first protrusions are arranged at different locations in the tracking direction such that the objective lens is sandwiched between the first protrusions, wherein the at least one second protrusion protrudes is formed by applying a second adhesive to at least one area of the top surface of the lens holder, and wherein tips of the first protrusions are closer to the optical disc than a tip of the at least one second protrusion.Type: ApplicationFiled: July 30, 2007Publication date: February 28, 2008Inventors: Satoshi Arai, Hiroaki Furuichi, Yoshio Oozeki, Rika Nomura, Masayuki Okamura, Kazumi Takahashi, Mitsuo Satake
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Publication number: 20070084736Abstract: A sealed storage bag of multiple compartment structure, wherein a separated condition of compartments is needed until just before the use, such as an infusion bag of a mixing type of two kinds of liquid or a bag for cooked storage food with flavoring materials. A sealed storage bag comprises a flexible outer bag; an inner bag as a rectangular small compartment having an inner storage space, which is separated, by a film member, from an outer storage space in the outer bag; a filling port for filling contents, and; a discharge port for discharging the contents. The inner storage space of the inner bag is formed by welding a peripheral portion of said rectangular film member forming said rectangular compartment to one heat weldable wall of the outer bag; said rectangular film member being, at its middle portion of small area along the width of the rectangular film member, welded to opposed other heat weldable wall of the outer bag, so that an inner bag opener portion is created.Type: ApplicationFiled: November 28, 2006Publication date: April 19, 2007Applicant: AJINOMOTO CO., INC.Inventors: Shoji IGOTA, Masayuki Okamura
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Patent number: 4679440Abstract: A throttle sensor for an engine comprises a first variable resistor interlocked with an opening and closing operation of a throttle valve of the engine and adapted to output an electrical signal corresponding to an opening degree of the throttle valve, and a composite circuit variable resistor electrically connected to the first variable resistor and adapted to correct a correlative value between the opening degree of the throttle valve and the electrical signal to be outputted from the first variable resistor corresponding to the opening degree. Thus, the correlative value of the electrical signal to be outputted from the variable resistor to the opening degree of the throttle valve may be easily and accurately adjusted to a target value.Type: GrantFiled: December 18, 1984Date of Patent: July 14, 1987Assignee: Aisan Kogyo Kabushiki KaishaInventor: Masayuki Okamura
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Patent number: 4275016Abstract: A variable venturi type carburetor incorporating a changeover valve which conducts the fuel vapor in the float chamber either into the internal passage leading to the suction pipe of the carburetor or into the external passage leading to the canister. The changeover valve is actuated via a rod projecting into the intake passage by a suction piston which is displaced according to the amount of air drawn into the engine and which abuttingly contacts the rod. With this invention, an electromagnetic valve employed in the conventional carburetor can be obviated and the structure of the carburetor becomes simple and small.Type: GrantFiled: September 25, 1979Date of Patent: June 23, 1981Assignee: Aisan Industry Co., Ltd.Inventors: Toshiharu Morino, Masayuki Okamura