Patents by Inventor Masanaga Nishikawa
Masanaga Nishikawa 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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Patent number: 9299908Abstract: A piezoelectric actuator that includes a piezoelectric substrate, first and second electrodes, and a conductive layer. The first and second electrodes are configured to apply a voltage to the piezoelectric substrate. The conductive layer is formed on the first electrode. The conductive layer is made of a metal or an alloy different in color from the second electrode.Type: GrantFiled: November 13, 2012Date of Patent: March 29, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kimitoshi Nakamura, Hiroshi Nakatani, Masanaga Nishikawa, Sachio Kitagawa
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Patent number: 8816571Abstract: A method of manufacturing a piezoelectric element, which includes a first electrode adjacent a first main surface of a mother piezoelectric substrate and a second electrode adjacent a second main surface. During formation of the first electrode and the second electrode, cutouts are provided in the first electrode and the second electrode so that the shapes of the first electrode and the second electrode are different from each other when the mother piezoelectric substrate is inverted.Type: GrantFiled: May 16, 2013Date of Patent: August 26, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Toshio Nishimura, Masanaga Nishikawa, Kazuhiko Sashisaki
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Patent number: 8729778Abstract: An electromechanical transducer that includes an elongating/contracting member and a driving member. The elongating/contracting member elongates and contracts in response to application of a voltage thereto. The elongating/contracting member has a side surface that is parallel to an elongation/contraction direction. The driving member is provided on the side surface of the elongating/contracting member. The driving member is displaced with elongation and contraction of the elongating/contracting member.Type: GrantFiled: May 18, 2012Date of Patent: May 20, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Masanaga Nishikawa, Takashi Hase, Toshio Nishimura
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Publication number: 20130241360Abstract: A method of manufacturing a piezoelectric element, which includes a first electrode adjacent a first main surface of a mother piezoelectric substrate and a second electrode adjacent a second main surface. During formation of the first electrode and the second electrode, cutouts are provided in the first electrode and the second electrode so that the shapes of the first electrode and the second electrode are different from each other when the mother piezoelectric substrate is inverted.Type: ApplicationFiled: May 16, 2013Publication date: September 19, 2013Applicant: Murata Manufacturing Co., Ltd.Inventors: Toshio Nishimura, Masanaga Nishikawa, Kazuhiko Sashisaki
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Patent number: 8471440Abstract: A magnetic head driving piezoelectric ceramic actuator having an actuator body and a coating layer. The actuator body has a piezoelectric ceramic substrate and first and second electrodes. The piezoelectric ceramic substrate has first and second principal surfaces, first and second side surfaces, and first and second edge surfaces. The first electrode has a first external electrode portion formed on a part of the first principal surface, and a second external electrode portion formed on the first edge surface. The second electrode has a third external electrode portion formed on the second edge surface, and a fourth external electrode portion formed on the first principal surface. Each of: at least a part of each of the first and second external electrode portions; and at least a part of each of the third and fourth external electrode portions, constitutes a joined portion mounted on the substrate by an electrically-conductive agent.Type: GrantFiled: October 5, 2010Date of Patent: June 25, 2013Assignee: Murata Manufacturing Co., Ltd.Inventors: Hiroshi Nakatani, Masanaga Nishikawa
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Patent number: 8378555Abstract: An electromechanical conversion element having high connection reliability and an actuator equipped with the electromechanical conversion element. The electromechanical conversion element includes: a displacement part capable of expanding and contracting by application of voltage and having electrode forming faces and an adhesion face which are disposed adjacent to each other; and external electrodes on the electrode forming faces, in which lead electrodes for applying voltage to the displacement part are bonded to bonding regions provided in the external electrodes, and a driven member capable of being driven by the expansion and contraction of the displacement part is bonded to the adhesion face by an adhesive. The electromechanical conversion element further includes bleed flow blocking parts on the electrode forming faces at points closer to the adhesion face than ends of the bonding regions located on the same side as the adhesion face.Type: GrantFiled: April 2, 2012Date of Patent: February 19, 2013Assignees: Murata Manufacturing Co., Ltd., Konica Minolta Opto, Inc.Inventors: Tadashi Yoda, Toshio Nishimura, Masanaga Nishikawa, Yasuhiro Okamoto, Tomoyuki Yuasa
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Publication number: 20120228997Abstract: An electromechanical transducer that includes an elongating/contracting member and a driving member. The elongating/contracting member elongates and contracts in response to application of a voltage thereto. The elongating/contracting member has a side surface that is parallel to an elongation/contraction direction. The driving member is provided on the side surface of the elongating/contracting member. The driving member is displaced with elongation and contraction of the elongating/contracting member.Type: ApplicationFiled: May 18, 2012Publication date: September 13, 2012Applicant: Murata Manufacturing Co., Ltd.Inventors: Masanaga Nishikawa, Takashi Hase, Toshio Nishimura
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Publication number: 20120187800Abstract: An electromechanical conversion element having high connection reliability and an actuator equipped with the electromechanical conversion element. The electromechanical conversion element includes: a displacement part capable of expanding and contracting by application of voltage and having electrode forming faces and an adhesion face which are disposed adjacent to each other; and external electrodes on the electrode forming faces, in which lead electrodes for applying voltage to the displacement part are bonded to bonding regions provided in the external electrodes, and a driven member capable of being driven by the expansion and contraction of the displacement part is bonded to the adhesion face by an adhesive. The electromechanical conversion element further includes bleed flow blocking parts on the electrode forming faces at points closer to the adhesion face than ends of the bonding regions located on the same side as the adhesion face.Type: ApplicationFiled: April 2, 2012Publication date: July 26, 2012Applicants: Konica Minolta Opto, Inc., Murata Manufacturing Co., Ltd.Inventors: Tadashi Yoda, Toshio Nishimura, Masanaga Nishikawa, Yasuhiro Okamoto, Tomoyuki Yuasa
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Patent number: 8174168Abstract: A piezoelectric power generating device includes a power generating element and a package member. The power generating element includes a plate-like piezoelectric element and a metal plate. The piezoelectric element has a pair of principal surfaces opposite each other. The metal plate is bonded to one of the principal surfaces of the piezoelectric element. The package member has a supporting part and a restricting part. The supporting part supports an end of the power generating element in a cantilevered manner. The restricting part is disposed opposite the piezoelectric element with the metal plate interposed therebetween. The restricting part restricts displacement of the power generating element toward the outside of the metal plate.Type: GrantFiled: September 27, 2010Date of Patent: May 8, 2012Assignee: Murata Manufacturing Co., Ltd.Inventors: Kimitoshi Nakamura, Tetsuo Takeshima, Kenichi Takahashi, Masanaga Nishikawa
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Patent number: 7956516Abstract: An ultrasonic sensor includes a cylindrical casing having a bottom portion. The casing has a piezoelectric element on a bottom surface thereof. A substrate is attached to an end surface of an opening portion of the casing with a damping member provided therebetween such that the damping member covers the opening portion. Pin terminals are arranged so as to extend through the substrate and the damping member and are electrically connected to the piezoelectric element with lead wires. An inner space of the casing is filled with foamable resin.Type: GrantFiled: August 12, 2008Date of Patent: June 7, 2011Assignee: Murata Manufacturing Co., Ltd.Inventors: Seigo Hayashi, Masanaga Nishikawa
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Publication number: 20110084571Abstract: A magnetic head driving piezoelectric ceramic actuator having an actuator body and a coating layer. The actuator body has a piezoelectric ceramic substrate and first and second electrodes. The piezoelectric ceramic substrate has first and second principal surfaces, first and second side surfaces, and first and second edge surfaces. The first electrode has a first external electrode portion formed on a part of the first principal surface, and a second external electrode portion formed on the first edge surface. The second electrode has a third external electrode portion formed on the second edge surface, and a fourth external electrode portion formed on the first principal surface. Each of: at least a part of each of the first and second external electrode portions; and at least a part of each of the third and fourth external electrode portions, constitutes a joined portion mounted on the substrate by an electrically-conductive agent.Type: ApplicationFiled: October 5, 2010Publication date: April 14, 2011Inventors: Hiroshi Nakatani, Masanaga Nishikawa
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Publication number: 20110012479Abstract: A piezoelectric power generating device includes a power generating element and a package member. The power generating element includes a plate-like piezoelectric element and a metal plate. The piezoelectric element has a pair of principal surfaces opposite each other. The metal plate is bonded to one of the principal surfaces of the piezoelectric element. The package member has a supporting part and a restricting part. The supporting part supports an end of the power generating element in a cantilevered manner. The restricting part is disposed opposite the piezoelectric element with the metal plate interposed therebetween. The restricting part restricts displacement of the power generating element toward the outside of the metal plate.Type: ApplicationFiled: September 27, 2010Publication date: January 20, 2011Inventors: Kimitoshi Nakamura, Tetsuo Takeshima, Kenichi Takahashi, Masanaga Nishikawa
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Publication number: 20100239444Abstract: A piezoelectric element that is capable of achieving a larger amount of displacement and in which migration between electrodes hardly occurs, is included in a piezoelectric pump. The piezoelectric pump includes a first excitation electrode opposed to a second excitation electrode via a first piezoelectric layer in a central area of a layered piezoelectric body, a third excitation electrode opposed to a fourth excitation electrode via a second piezoelectric layer and a third excitation electrode opposed to a fourth excitation electrode via the second piezoelectric layer in peripheral portions of the layered piezoelectric body.Type: ApplicationFiled: June 9, 2010Publication date: September 23, 2010Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Shinya NAGAO, Toshio NISHIMURA, Masanaga NISHIKAWA
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Patent number: 7795785Abstract: An ultrasonic sensor includes a cylindrical case with a bottom. A piezoelectric element is bonded to an inner side of a bottom portion of the case, and a felt is bonded to the piezoelectric element. A cap is fitted to an opening of the case. The cap includes a fixing portion and a substrate which is harder than the fixing portion. Terminals are press-fitted to the substrate. Wires are connected to the terminals, so that the terminals are electrically connected to the piezoelectric element. A through hole is provided in the fixing portion. Resin before being foamed is injected from the through hole and then foamed, so that the case is filled with foamable resin while an excess amount of foamable resin is pushed out from the through hole.Type: GrantFiled: August 12, 2008Date of Patent: September 14, 2010Assignee: Murata Manufacturing Co., Ltd.Inventors: Seigo Hayashi, Shinji Amaike, Masanaga Nishikawa, Kazuo Shima
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Patent number: 7589527Abstract: A magnetoresistive device disposed in an elongated magnetic sensor, for example, has two parallel arrays of magnetosensitive elements arranged at regular intervals in the longitudinal direction. The magnetosensitive elements are connected in series through connection conductors, in a meandering pattern. The magnetoresistive device is disposed between two other magnetoresistive devices. The magnetoresistive devices are arranged such that the intervals between the magnetosensitive elements disposed at the ends of a magnetoresistive in the longitudinal direction and the opposed magnetosensitive elements of the magnetoresistive devices, respectively, are equal to the intervals between the magnetoresistive elements within the magnetoresistive devices.Type: GrantFiled: March 7, 2005Date of Patent: September 15, 2009Assignee: Murata Manufacturing Co., Ltd.Inventors: Tamotsu Minamitani, Masaya Ueda, Koji Shinmura, Masanaga Nishikawa
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Publication number: 20090146656Abstract: A magnetoresistive device disposed in an elongated magnetic sensor, for example, has two parallel arrays of magnetosensitive elements arranged at regular intervals in the longitudinal direction. The magnetosensitive elements are connected in series through connection conductors, in a meandering pattern. The magnetoresistive device is disposed between two other magnetoresistive devices. The magnetoresistive devices are arranged such that the intervals between the magnetosensitive elements disposed at the ends of a magnetoresistive in the longitudinal direction and the opposed magnetosensitive elements of the magnetoresistive devices, respectively, are equal to the intervals between the magnetoresistive elements within the magnetoresistive devices.Type: ApplicationFiled: March 7, 2005Publication date: June 11, 2009Inventors: Tamotsu Minamitani, Masaya Ueda, Koji Shinmura, Masanaga Nishikawa
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Patent number: 7538282Abstract: A multistage switch includes a switch push button. A magnet is disposed in a recess of the inner wall surface of the switch push button. The multistage switch further includes a magnetic sensor, and the magnetic sensor includes a substrate. Two magnetoelectric transducers are mounted on a surface of the substrate, and are disposed so as to face the magnet.Type: GrantFiled: July 19, 2007Date of Patent: May 26, 2009Assignee: Murata Manufacturing Co., Ltd.Inventors: Kenji Tomaki, Masanaga Nishikawa, Masaya Ueda
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Publication number: 20080290758Abstract: An ultrasonic sensor includes a cylindrical casing having a bottom portion. The casing has a piezoelectric element on a bottom surface thereof. A substrate is attached to an end surface of an opening portion of the casing with a damping member provided therebetween such that the damping member covers the opening portion. Pin terminals are arranged so as to extend through the substrate and the damping member and are electrically connected to the piezoelectric element with lead wires. An inner space of the casing is filled with foamable resin.Type: ApplicationFiled: August 12, 2008Publication date: November 27, 2008Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Seigo HAYASHI, Masanaga NISHIKAWA
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Publication number: 20080289428Abstract: An ultrasonic sensor includes a cylindrical case with a bottom. A piezoelectric element is bonded to an inner side of a bottom portion of the case, and a felt is bonded to the piezoelectric element. A cap is fitted to an opening of the case. The cap includes a fixing portion and a substrate which is harder than the fixing portion. Terminals are press-fitted to the substrate. Wires are connected to the terminals, so that the terminals are electrically connected to the piezoelectric element. A through hole is provided in the fixing portion. Resin before being foamed is injected from the through hole and then foamed, so that the case is filled with foamable resin while an excess amount of foamable resin is pushed out from the through hole.Type: ApplicationFiled: August 12, 2008Publication date: November 27, 2008Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Seigo HAYASHI, Shinji AMAIKE, Masanaga NISHIKAWA, Kazuo SHIMA
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Publication number: 20070257753Abstract: A multistage switch includes a switch push button. A magnet is disposed in a recess of the inner wall surface of the switch push button. The multistage switch further includes a magnetic sensor, and the magnetic sensor includes a substrate. Two magnetoelectric transducers are mounted on a surface of the substrate, and are disposed so as to face the magnet.Type: ApplicationFiled: July 19, 2007Publication date: November 8, 2007Applicant: Murata Manufacturing Co., Ltd.Inventors: Kenji Tomaki, Masanaga Nishikawa, Masaya Ueda