Patents by Inventor Hidehisa Tanaka
Hidehisa Tanaka 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: 20240134126Abstract: According to one embodiment, in an optical fiber bundle, in the cross section, arrangement of cores of a first multi-core fiber and arrangement of cores of a second multi-core fiber are the same as each other, arrangement of cores of a third multi-core fiber and arrangement of cores of a fourth multi-core fiber are the same as each other, and when the first multi-core fiber is rotated 180° in a circumferential direction of the first multi-core fiber, the arrangement of the cores of the first multi-core fiber is the same as the arrangement of the cores of the fourth multi-core fiber.Type: ApplicationFiled: September 14, 2023Publication date: April 25, 2024Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Osamu SHIMAKAWA, Hidehisa TAZAWA, Masato TANAKA
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Patent number: 11927805Abstract: An optical fiber connection structure includes: a tubular member; a first collimator attached to a first end of the tubular member in an axial direction; and a second collimator attached to a second end of the tubular member. The first collimator includes a first optical fiber, a first ferrule, a first lens, and a first sleeve. The second collimator includes a second optical fiber, a second ferrule terminating the second optical fiber, a second lens, and a second sleeve. The first sleeve is fixed to the first end via adhesive in a state where the first lens faces the tubular member, and the second sleeve is fixed to the second end via adhesive in a state where the second lens faces the tubular member. An outer diameter of the second ferrule is larger than that of the second lens.Type: GrantFiled: May 28, 2021Date of Patent: March 12, 2024Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Osamu Shimakawa, Hidehisa Tazawa, Masato Tanaka
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Publication number: 20210252915Abstract: A belt layer is provided at a tire radial direction (arrow R direction) outer side of a carcass. This belt layer is structured to include a reinforcing portion and a resin portion. The reinforcing portion of the belt is formed by reinforcing cords crossing, and surfaces of the resin cords are covered by the resin portion.Type: ApplicationFiled: June 12, 2019Publication date: August 19, 2021Inventors: Tetsushi KAMIJO, Keiichi HASEGAWA, Hidehisa TANAKA
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Patent number: 10637377Abstract: A motor driving device includes: brushless DC motor (5) that drives a load that fluctuates during one rotation; and driver (9) that applies a voltage to brushless DC motor (5) and drives brushless DC motor (5). The motor driving device further includes speed accelerator (8) that determines the voltage to be applied by driver (9) so as to accelerate brushless DC motor (5) such that a speed change rate of a speed within one rotation from start of brushless DC motor (5) with respect to a speed at next one rotation remains within a predetermined value or less.Type: GrantFiled: February 15, 2018Date of Patent: April 28, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yoshinori Takeoka, Hidehisa Tanaka
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Publication number: 20180175752Abstract: A motor driving device includes: brushless DC motor (5) that drives a load that fluctuates during one rotation; and driver (9) that applies a voltage to brushless DC motor (5) and drives brushless DC motor (5). The motor driving device further includes speed accelerator (8) that determines the voltage to be applied by driver (9) so as to accelerate brushless DC motor (5) such that a speed change rate of a speed within one rotation from start of brushless DC motor (5) with respect to a speed at next one rotation remains within a predetermined value or less.Type: ApplicationFiled: February 15, 2018Publication date: June 21, 2018Inventors: Yoshinori TAKEOKA, Hidehisa TANAKA
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Publication number: 20180123487Abstract: Motor drive device (30) includes brushless DC motor (5) that drives a load and speed controller (8) that decides a PWM ON ratio for performing PWM control on brushless DC motor (5). The motor drive device further includes PWM ON ratio increasing-reducing unit (9) that increases/reduces the PWM ON ratio in accordance with a driving speed of brushless DC motor (5) and drive unit (10) that performs PWM control for driving brushless DC motor (5) in accordance with the PWM ON ratio decided by PWM ON ratio increasing-reducing unit (9). PWM ON ratio increasing-reducing unit (9) sets the PWM ON ratio to a ratio equal to or lower than the PWM ON ratio decided by speed controller (8) in an interval in which the driving speed of brushless DC motor (5) is lower than a predetermined speed, and sets the PWM ON ratio to a ratio equal to or higher than the PWM ON ratio decided by speed controller (8) in an interval in which the driving speed is higher than the predetermined speed.Type: ApplicationFiled: April 21, 2016Publication date: May 3, 2018Inventors: Yoshinori TAKEOKA, Hidehisa TANAKA
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Patent number: 8716964Abstract: Phase correction unit (25) for outputting a commutation signal for switching a winding that allows a current to flow to brushless DC motor (4) and drive unit (16) for outputting a drive signal indicating supplying timing of electric power supplied to brushless DC motor (4) by inverter (3) based on the commutation signal output from phase correction unit (25) are provided so as to maintain a predetermined relation between a phase of a current flowing to a predetermined winding of brushless DC motor (4) and a phase of a voltage. Since brushless DC motor (4) is driven by a signal for holding the predetermined relation between the phase of the current and the phase of the voltage, the stability of drive under high-speed and high-load conditions is enhanced and a drive range is extended.Type: GrantFiled: December 1, 2009Date of Patent: May 6, 2014Assignee: Panasonic CorporationInventors: Hidehisa Tanaka, Yoshinori Takeoka
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Patent number: 8664899Abstract: To present a motor drive control device capable of realizing high speed driving by a simple power feeding control method. The motor drive control device of the invention has a three-phase full bridge circuit for adjusting the feeding phase so as to invert the terminal voltage in feeding-off time, by cyclically repeating positive direction feeding period, non-feeding period, negative direction feeding period, and non-feeding period. In high speed driving, the phase is adjusted so as to invert the terminal voltage right after feeding-off, and if not reaching the desired rotating speed, the feeding time is shortened. As a result, the phase angle to the actual applied voltage can be advanced, and high seed rotation by weak-field system driving is realized.Type: GrantFiled: May 15, 2009Date of Patent: March 4, 2014Assignee: Panasonic CorporationInventors: Yoshiaki Doyama, Yoshinori Takeoka, Hidehisa Tanaka
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Patent number: 8226372Abstract: A compressor includes a motor driven by a controller and having a rotor and a stator, a compressing unit driven by the motor in a hermetic container in which refrigerant is filled. Driving the motor at a low rpm, the controller practices a feedback control which determines a timing of turning on/off switching elements based on a signal detecting a position of the rotor, and when the motor is driven at a high rpm, the controller practices an open-loop control which outputs a given frequency and drives the motor synchronizing with the given frequency. This structure achieves a compressor working with a fewer noises in PWM driving.Type: GrantFiled: March 16, 2004Date of Patent: July 24, 2012Assignee: Panasonic CorporationInventors: Koji Hamaoka, Hidetoshi Nishihara, Katsumi Endo, Makoto Katayama, Shuichi Yakushi, Tatsuyuki Iizuka, Yuji Saiki, Hidehisa Tanaka, Tomonori Ouchiyama
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Publication number: 20110279070Abstract: Brushless DC motor (4) is driven based on a first or second waveform signal output from operation switching unit (11), which switches output so that a first waveform signal by first waveform generation unit (6) is output when the speed of rotor (4a) is determined to be lower than a predetermined speed, and a second waveform signal by second waveform generation unit (10) is output when the speed of rotor (4a) is determined to be higher than the predetermined speed. Thus, there is provided a motor driving device in which drive is stable even at high speed/under high load, and a driving range is extended.Type: ApplicationFiled: January 13, 2010Publication date: November 17, 2011Applicant: PANASONIC CORPORATIONInventors: Hidehisa Tanaka, Yoshinori Takeoka
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Patent number: 8057209Abstract: A mold for an injection molding apparatus includes a light-transmitting part forming at least a portion of the mold, and configured to transmit light to a cavity to be filled with photo-setting resin.Type: GrantFiled: September 7, 2007Date of Patent: November 15, 2011Assignee: Toshiba Kikai Kabushiki KaishaInventors: Hidehisa Tanaka, Jyun Koike, Yukio Iimura
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Publication number: 20110256005Abstract: Brushless DC motor (4) is driven based on a first or second waveform signal output from switching determination unit (11), which switches outputting so that a first waveform signal by first waveform generation unit (6) is output when the speed of rotor (4a) is determined to be lower than a predetermined speed, and a second waveform signal by second waveform generation unit (10) is output when the speed of rotor (4a) is determined to be higher than the predetermined speed. Thereby, drive is stable even at high speed/under high load, and a driving range is extended.Type: ApplicationFiled: January 13, 2010Publication date: October 20, 2011Applicant: PANASONIC CORPORATIONInventors: Yoshinori Takeoka, Hidehisa Tanaka
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Publication number: 20110219816Abstract: Phase correction unit (25) for outputting a commutation signal for switching a winding that allows a current to flow to brushless DC motor (4) and drive unit (16) for outputting a drive signal indicating supplying timing of electric power supplied to brushless DC motor (4) by inverter (3) based on the commutation signal output from phase correction unit (25) are provided so as to maintain a predetermined relation between a phase of a current flowing to a predetermined winding of brushless DC motor (4) and a phase of a voltage. Since brushless DC motor (4) is driven by a signal for holding the predetermined relation between the phase of the current and the phase of the voltage, the stability of drive under high-speed and high-load conditions is enhanced and a drive range is extended.Type: ApplicationFiled: December 1, 2009Publication date: September 15, 2011Applicant: PANASONIC CORPORATIONInventors: Hidehisa Tanaka, Yoshinori Takeoka
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Publication number: 20100253260Abstract: To present a motor drive control device capable of realizing high speed driving by a simple power feeding control method. The motor drive control device of the invention has a three-phase full bridge circuit for adjusting the feeding phase so as to invert the terminal voltage in feeding-off time, by cyclically repeating positive direction feeding period, non-feeding period, negative direction feeding period, and non-feeding period. In high speed driving, the phase is adjusted so as to invert the terminal voltage right after feeding-off, and if not reaching the desired rotating speed, the feeding time is shortened. As a result, the phase angle to the actual applied voltage can be advanced, and high seed rotation by weak-field system driving is realized.Type: ApplicationFiled: May 15, 2009Publication date: October 7, 2010Inventors: Yoshiaki Doyama, Yoshinori Takeoka, Hidehisa Tanaka
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Publication number: 20080061478Abstract: A mold for an injection molding apparatus includes a light-transmitting part forming at least a portion of the mold, and configured to transmit light to a cavity to be filled with photo-setting resin.Type: ApplicationFiled: September 7, 2007Publication date: March 13, 2008Applicant: TOSHIBA KIKAI KABUSHIKI KAISHAInventors: HIDEHISA TANAKA, Jyun Koike, Yukio Iimura
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Patent number: 7102306Abstract: A rectangular wave or a waveform similar to the rectangular wave is output with an conductive angle no less than 120° but no more than 150° during low-speed operation, but output a rectangular wave, a sine wave or a waveform similar to them with an conductive angle no less than 130° but under 180° by changing the frequency only while maintaining the PWM duty constant at high-speed operation, making it possible to realize high-efficiency and low-noise operation at low-speed operation, secure stable high speed, and prevent peak current of effective current because the current waveform also comes closer to sine wave.Type: GrantFiled: March 8, 2004Date of Patent: September 5, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koji Hamaoka, Hidehisa Tanaka, Tomonori Ouchiyama
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Publication number: 20060082339Abstract: A rectangular wave or a waveform similar to the rectangular wave is output with an conductive angle no less than 120° but no more than 150° during low-speed operation, but output a rectangular wave, a sine wave or a waveform similar to them with an conductive angle no less than 130° but under 180° by changing the frequency only while maintaining the PWM duty constant at high-speed operation, making it possible to realize high-efficiency and low-noise operation at low-speed operation, secure stable high speed, and prevent peak current of effective current because the current waveform also comes closer to sine wave.Type: ApplicationFiled: March 8, 2004Publication date: April 20, 2006Inventors: Koji Hamaoka, Hidehisa Tanaka, Tomonori Ouchiyama
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Publication number: 20060039807Abstract: A compressor includes a motor driven by a controller and having a rotor and a stator, a compressing unit driven by the motor in a hermetic container in which refrigerant is filled. Driving the motor at a low rpm, the controller practices a feedback control which determines a timing of turning on/off switching elements based on a signal detecting a position of the rotor, and when the motor is driven at a high rpm, the controller practices an open-loop control which outputs a given frequency and drives the motor synchronizing with the given frequency. This structure achieves a compressor working with a fewer noises in PWM driving.Type: ApplicationFiled: March 16, 2004Publication date: February 23, 2006Inventors: Koji Hamaoka, Hidetoshi Nishihara, Katsumi Endo, Makoto Katayama, Shuichi Yakushi, Tatsuyuki Iizuka, Yuji Saiki, Hidehisa Tanaka, Tomonori Ouchiyama