Patents by Inventor Hiromi Ozawa
Hiromi Ozawa 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: 20240412926Abstract: A solid electrolytic capacitor includes a solid electrolytic capacitor element and an exterior body that seals the solid electrolytic capacitor element. The solid electrolytic capacitor element includes an anode body including a first end part and a second end part that is disposed opposite to the first end part, a dielectric layer covering at least a part of the anode body, and a cathode part covering at least a part of the dielectric layer. The at least a part of the dielectric layer is disposed on a portion of the anode body that is closer to the second end part than to the first end part. The cathode part includes a solid electrolyte layer covering the at least a part of the dielectric layer. A breaking strength of the solid electrolyte layer is 0.55 MPa or more and 45.00 MPa or less.Type: ApplicationFiled: September 15, 2022Publication date: December 12, 2024Inventors: TAKAHIRO YOSHII, KEI HIROTA, HIROMI OZAWA
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Publication number: 20230360859Abstract: An anode body, a dielectric layer disposed on a surface of the anode body, and a cathode part covering at least a part of the dielectric layer are provided. The cathode part includes a solid electrolyte layer covering the at least the part of the dielectric layer and containing a conjugated polymer. A solid electrolytic capacitor having excellent heat resistance is provided by using a solid electrolytic capacitor element where a full width at half maximum of a first peak is in a range from 35 cm?1 to 80 cm?1 inclusive when the first peak attributed to a CC stretching vibration derived from the conjugated polymer is fitted with a Lorentz function in a Raman spectrum of the solid electrolyte layer.Type: ApplicationFiled: October 21, 2021Publication date: November 9, 2023Inventors: TAKAHIRO YOSHII, KEI HIROTA, HIROMI OZAWA
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Publication number: 20230245836Abstract: A solid electrolytic capacitor element includes an anode body, a dielectric layer disposed on a surface of the anode body, and a cathode part covering at least a part of the dielectric layer are provided. The cathode part includes a solid electrolyte layer covering the at least the part of the dielectric layer. The solid electrolyte layer contains a first polymer and a second polymer component. The first polymer component includes a monomer unit corresponding to a thiophene compound. The second polymer component includes a polymer anion. A Raman spectrum of a surface layer in the solid electrolyte layer has a peak characteristic for the first polymer component.Type: ApplicationFiled: July 15, 2021Publication date: August 3, 2023Inventors: MASATOSHI TAKESHITA, HIROMI OZAWA, YIHAN ZHANG, HITOSHI FUKUI
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Publication number: 20230076194Abstract: A capacitor element includes an anode body, a dielectric layer disposed on a surface of the anode body, a solid electrolyte layer covering at least a part of the dielectric layer, and a cathode lead-out layer covering at least a part of the solid electrolyte layer. An insulating member is disposed from an outermost surface of the cathode lead-out layer to a depth of more than or equal to 0.001 ?m.Type: ApplicationFiled: January 26, 2021Publication date: March 9, 2023Inventors: HITOSHI FUKUI, KATSUHISA ISHIZAKI, MASAMICHI INOUE, DAISUKE USA, MAKOTO NAGASHIMA, HIROMI OZAWA
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Patent number: 10547182Abstract: When a main switch (12) is turned ON, an electric operating machine (1) is put in the standby mode. With a trigger (13) being pulled in the standby mode, a power supply circuit (16) applies a voltage to a drive part (30). The power supply circuit (16) adjusts the voltage applied to the drive part (30) for a voltage corresponding to the pulling rate of the trigger (13). When the current running toward the drive part (30) exceeds the rated value of the drive part (30), the power supply circuit (16) automatically stops power supply to the drive part (30). On the other hand, when the output voltage of a battery (50) drops and the battery (50) is put in an overdischarge state, power supply to the drive part (30) is automatically stopped. When it is detected that the battery (50) undergoes an abnormal event, power supply to the drive part (30) is automatically stopped.Type: GrantFiled: February 10, 2017Date of Patent: January 28, 2020Assignee: KOKI HOLDINGS CO., LTD.Inventors: Nobuhiro Takano, Kazuhiko Funabashi, Hideyuki Tanimoto, Chikai Yoshimizu, Hiromi Ozawa, Yoshihiro Hoshi
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Patent number: 9955627Abstract: An electric working machine including: a motor; a control unit configured to control rotation of the motor; a fixed part provided with a handle having a grip portion; a movable part held by the fixed part and is configured to be extendible by sliding relative to the fixed part; and a cutting blade provided to a end portion of the movable pipe and is configured to be driven by the motor; characterized in that the electric working machine further includes a detection unit which is connected to the control unit and is configured to detect whether or not the movable part is positioned at a predetermined extended position relative to the fixed part.Type: GrantFiled: February 15, 2013Date of Patent: May 1, 2018Assignee: HITACHI KOKI CO., LTD.Inventors: Yasushi Nakano, Yuki Horie, Kazuhiko Funabashi, Yuuichi Toyoshima, Hiromi Ozawa, Hirohisa Tomita
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Publication number: 20170155258Abstract: When a main switch (12) is turned ON, an electric operating machine (1)is put in the standby mode. With a trigger (13) being pulled in the standby mode, a power supply circuit (16) applies a voltage to a drive part (30). The power supply circuit (16) adjusts the voltage applied to the drive part (30) for a voltage corresponding to the pulling rate of the trigger (13). When the current running toward the drive part (30) exceeds the rated value of the drive part (30), the power supply circuit (16) automatically stops power supply to the drive part (30). On the other hand, when the output voltage of a battery (50) drops and the battery (50) is put in an overdischarge state, power supply to the drive part (30) is automatically stopped. When it is detected that the battery (50) undergoes an abnormal event, power supply to the drive part (30) is automatically stopped.Type: ApplicationFiled: February 10, 2017Publication date: June 1, 2017Inventors: Nobuhiro TAKANO, Kazuhiko FUNABASHI, Hideyuki TANIMOTO, Chikai YOSHIMIZU, Hiromi OZAWA, Yoshihiro HOSHI
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Publication number: 20160021819Abstract: An electric working machine including: a motor; a control unit configured to control rotation of the motor; a fixed part provided with a handle having a grip portion; a movable part held by the fixed part and is configured to be extendible by sliding relative to the fixed part; and a cutting blade provided to a end portion of the movable pipe and is configured to be driven by the motor; characterized in that the electric working machine further includes a detection unit which is connected to the control unit and is configured to detect whether or not the movable part is positioned at a predetermined extended position relative to the fixed part.Type: ApplicationFiled: February 15, 2013Publication date: January 28, 2016Inventors: Yasushi Nakano, Yuki Horie, Kazuhiko Funabashi, Yuuichi Toyoshima, Hiromi Ozawa, Hirohisa Tomita
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Patent number: 9160211Abstract: An electric grasscutter includes a motor (50) which drives a rotary blade (42). The motor (50) is a brushless motor accommodated in a motor housing (51) and including a rotor (53) provided integrally with an output shaft (52), and a stator (54) fixed to the motor housing (51). A motor control circuit which drives the motor (50) is accommodated in the motor housing (51). The motor control circuit includes an inverter having FETs (81-86) as switching elements, and a control section to control the FETs (81-86). The FETs (81-86) are fixed in contact with the motor housing (51).Type: GrantFiled: September 22, 2010Date of Patent: October 13, 2015Assignee: HITACHI KOKI CO., LTD.Inventors: Hideyuki Tanimoto, Chikai Yoshimizu, Nobuhiro Takano, Hiromi Ozawa, Kazuhiko Funabashi
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Patent number: 8928201Abstract: A motor has an output shaft which is rotatably supported by a housing, a rotor which is fixed to the output shaft and which comprises a printed-wiring board, and a stator which is fixed to the housing and which comprises a magnet facing the rotor. The printed-wiring board comprises a coil/commutator disk and a coil disk. A commutator conductor pattern is formed in a commutator region of the coil/commutator disk. Likewise, coil conductor patterns are formed in respective coil regions of the coil/commutator disk and of the coil disk.Type: GrantFiled: September 22, 2010Date of Patent: January 6, 2015Assignee: Hitachi Koki Co., Ltd.Inventors: Hideyuki Tanimoto, Chikai Yoshimizu, Nobuhiro Takano, Hiromi Ozawa, Kazuhiko Funabashi
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Publication number: 20140130645Abstract: First, second and third sensors 11, 12 and 13 emit electromagnetic waves, receive electromagnetic waves emitted by the first, second and third sensors 11, 12 and 13 and reflected by an object 9 or electromagnetic wave emitted by the object 9 that received the electromagnetic waves emitted by the first, second and third sensors 11, 12 and 13, and specify distances between themselves and the object 9, respectively, based on time differences between emissions and receptions of the electromagnetic waves, and a control section 3 specifies three-dimensional coordinates of the object 9 based on the distances between the respective sensors 11, 12 and 13 and the object 9, determines whether or not the three-dimensional coordinate of the object 9 falls within a predetermined region and stops a motor when the three-dimensional coordinates of the object 9 falls within the region.Type: ApplicationFiled: August 8, 2012Publication date: May 15, 2014Applicant: HITACHI KOKI CO., LTD.Inventors: Nobuhiro Takano, Shigeharu Ushiwata, Hiromi Ozawa, Yoshikazu Kawano
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Publication number: 20120222535Abstract: According to an aspect of the invention, a bench cutter like a miter saw including: a drive portion driving a cutting blade; a base portion supporting a workpiece; a cutting portion arranged on the base portion, pivotally supporting the cutting blade above the base portion, and configured to make the cutting blade come close to and separate from the base portion; and a supporting portion connected to the base portion and movably supporting the cutting portion, wherein the cutting portion including: a transmission portion for transmitting power of the drive portion to the cutting blade; and a gear case covering the transmission mechanism and having a lower face portion opposed to an upper face of the base portion, wherein the transmission portion including: a spindle concentrically supporting the cutting blade; and a cutting blade fixing portion having a flange for fixing the cutting blade to the spindle.Type: ApplicationFiled: May 11, 2012Publication date: September 6, 2012Applicant: HITACHI KOKI CO., LTD.Inventors: Ryuuichi IMAMURA, Hiromi OZAWA, Masayuki TAJIMA, Hirohide KAWADA
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Patent number: 8230768Abstract: A miter saw having good workability without decrease in angle visibility is disclosed. The miter saw includes a display unit provided on a turntable. The display unit 600 is positioned between an operating handle protruding outward from the turntable and a rotation axis of the turntable. The display unit is positioned below the upper surfaces of a base and the turntable not so as to protrude above the upper surface of the turntable. The display unit displays an inclination angle of a circular saw blade with respect to the upper surface of the base and a rotation angle of the turntable with respect to the base in a line.Type: GrantFiled: January 18, 2005Date of Patent: July 31, 2012Assignee: Hitachi Koki Co., Ltd.Inventors: Hiromi Ozawa, Eisaku Oka, Nobuhiro Takano, Hideaki Terashima
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Publication number: 20120139456Abstract: When a main switch (12) is turned ON, an electric operating machine (1) is put in the standby mode. With a trigger (13) being pulled in the standby mode, a power supply circuit (16) applies a voltage to a drive part (30). The power supply circuit (16) adjusts the voltage applied to the drive part (30) for a voltage corresponding to the pulling rate of the trigger (13). When the current running toward the drive part (30) exceeds the rated value of the drive part (30), the power supply circuit (16) automatically stops power supply to the drive part (30). On the other hand, when the output voltage of a battery (50) drops and the battery (50) is put in an overdischarge state, power supply to the drive part (30) is automatically stopped. When it is detected that the battery (50) undergoes an abnormal event, power supply to the drive part (30) is automatically stopped.Type: ApplicationFiled: August 27, 2010Publication date: June 7, 2012Inventors: Nobuhiro Takano, Kazuhiko Funabashi, Hideyuki Tanimoto, Chikai Yoshimizu, Hiromi Ozawa, Yoshihiro Hoshi
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Publication number: 20120104983Abstract: An electric grasscutter includes a motor (50) which drives a rotary blade (42). The motor (50) is a brushless motor accommodated in a motor housing (51) and including a rotor (53) provided integrally with an output shaft (52), and a stator (54) fixed to the motor housing (51). A motor control circuit which drives the motor (50) is accommodated in the motor housing (51). The motor control circuit includes an inverter having FETs (81-86) as switching elements, and a control section to control the FETs (81-86). The FETs (81-86) are fixed in contact with the motor housing (51).Type: ApplicationFiled: September 22, 2010Publication date: May 3, 2012Inventors: Hideyuki Tanimoto, Chikai Yoshimizu, Nobuhiro Takano, Hiromi Ozawa, Kazuhiko Funabashi
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Publication number: 20120104881Abstract: A motor has an output shaft which is rotatably supported by a housing, a rotor which is fixed to the output shaft and which comprises a printed-wiring board, and a stator which is fixed to the housing and which comprises a magnet facing the rotor. The printed-wiring board comprises a coil/commutator disk and a coil disk. A commutator conductor pattern is formed in a commutator region of the coil/commutator disk. Likewise, coil conductor patterns are formed in respective coil regions of the coil/commutator disk and of the coil disk.Type: ApplicationFiled: September 22, 2010Publication date: May 3, 2012Inventors: Hideyuki Tanimoto, Chikai Yoshimizu, Nobuhiro Takano, Hiromi Ozawa, Kazuhiko Funabashi
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Patent number: 8047111Abstract: A miter saw including a base, a turntable, a support section extending from the turntable, and a circular saw unit supported to the support section. An adjustment mechanism is provided between the base and the turntable for performing fine-adjustment to the rotation angle of the turntable relative to the base. The adjustment mechanism is located at a front side of the turntable, and a digital display is provided near the adjustment mechanism for displaying the rotation angle.Type: GrantFiled: June 30, 2005Date of Patent: November 1, 2011Assignee: Hitachi Koki Co., Ltd.Inventors: Shigeharu Ushiwata, Hideaki Terashima, Ryuichi Imamura, Hiromi Ozawa, Toshihiko Hayashizaki
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Patent number: 7778796Abstract: A digital miter saw for cutting a workpiece includes a base, a member supported on the base and moveable relative to the base, and a cutting member moveable with the member. A detector is provided for detecting at least one of a miter angle and a bevel angle between the cutting member and the workpiece, and for outputting a signal indicative of the at least one detected angle, and a digital controller is provided which has an interface operable to receive the signal.Type: GrantFiled: March 1, 2006Date of Patent: August 17, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Nobuhiro Takano, Eisaku Oka, Hiromi Ozawa, Yoshikazu Kawano, Kenrou Ishimaru, Tomoyuki Kawahara, Hiroyuki Saitou
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Patent number: 7770501Abstract: A miter saw having a cutting portion movable toward and away from a base and laterally tiltable for bevel cutting. A gear case is provided at the cutting portion and is positioned at one lateral side of the cutting portion. A bearing holder is provided in the gear case for holding a bearing which rotatably supports a spindle for a circular saw blade. The bearing holder has a thickness smaller than an axial length of the bearing. A first bearing nip member in contact with one axial end of the bearing is fixed to one side of the bearing holder, and a second bearing nip member in contact with another axial end of the bearing is fixed to another side of the bearing holder. These nip members are made from a material having a mechanical strength higher than that of the bearing holder.Type: GrantFiled: May 23, 2006Date of Patent: August 10, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Hiromi Ozawa, Kouji Takase, Hiroyuki Saitou
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Patent number: 7757593Abstract: A miter saw having a laterally tiltable cutting portion and a fence unit that supports a workpiece without mechanical interference with the cutting portion regardless of its laterally tilting posture. A left fence unit and a right fence unit are provided on a base portion. The left fence includes a fixed left fence, a first left subordinate fence pivotally movably connected to the fixed left fence, and a second left subordinate fence pivotally movably connected to the fixed left fence. The first left subordinate fence is moved to a first position outside of a first titling region of the cutting portion, and to a second position outside of the first tilting region and a second tilting region in which a tilting angle of the cutting portion is greater than that in the first tilting region.Type: GrantFiled: May 23, 2006Date of Patent: July 20, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Kouji Takase, Hiromi Ozawa, Hiroyuki Saitou