Patents by Inventor Tadao Sunahara
Tadao Sunahara 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: 10856086Abstract: A piezoelectric sounding element includes a diaphragm made of metal and a piezoelectric element provided on at least one surface of the diaphragm. A non-fixed portion of the diaphragm includes the pair of long sides facing each other, a pair of short sides, shorter than the long sides, that face each other, and a pair of recesses, provided in the pair of long sides, that protrude so as to approach each other. The piezoelectric element is provided in a region between the pair of recesses of the diaphragm and the contour shapes of the non-fixed portion of the diaphragm and the piezoelectric element are defined so as to be symmetric with respect to a first imaginary line that bisects the pair of short sides and symmetric with respect to a second imaginary line that bisects the pair of long sides.Type: GrantFiled: March 29, 2018Date of Patent: December 1, 2020Assignees: HOKURIKU ELECTRIC INDUSTRY CO., LTD., DENSO ELECTRONICS CORPORATIONInventors: Masahide Tamura, Tadao Sunahara, Koji Hamada, Ryuta Suzuki
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Publication number: 20200045475Abstract: A piezoelectric sounding element includes a diaphragm made of metal and a piezoelectric element provided on at least one surface of the diaphragm. A non-fixed portion of the diaphragm includes the pair of long sides facing each other, a pair of short sides, shorter than the long sides, that face each other, and a pair of recesses, provided in the pair of long sides, that protrude so as to approach each other. The piezoelectric element is provided in a region between the pair of recesses of the diaphragm and the contour shapes of the non-fixed portion of the diaphragm and the piezoelectric element are defined so as to be symmetric with respect to a first imaginary line that bisects the pair of short sides and symmetric with respect to a second imaginary line that bisects the pair of long sides.Type: ApplicationFiled: March 29, 2018Publication date: February 6, 2020Inventors: Masahide Tamura, Tadao Sunahara, Koji Hamada, Ryuta Suzuki
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Patent number: 9398377Abstract: A piezoelectric sound generating element capable of providing flatter and less fluctuated sound pressure frequency characteristics includes a diaphragm that is formed in a circular plate shape with a circular profile. A piezoelectric element is affixed to the side of a bottom wall portion of the diaphragm. The piezoelectric element has an asymmetric octagonal profile including a pair of long side portions opposing each other, a pair of short side portions opposing each other, and four connecting side portions.Type: GrantFiled: August 2, 2012Date of Patent: July 19, 2016Assignees: HOKURIKU ELECTRIC INDUSTRY CO., LTD., ANDEN CO., LTD.Inventors: Tadao Sunahara, Masahide Tamura, Osamu Kawasaki, Masaru Tsuchiya, Ryuta Suzuki, Makoto Tsuruta, Nobuhiro Miwa, Hitoshi Sakamoto
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Publication number: 20140241550Abstract: A piezoelectric sound generating element capable of providing flatter and less fluctuated sound pressure frequency characteristics includes a diaphragm that is formed in a circular plate shape with a circular profile. A piezoelectric element is affixed to the side of a bottom wall portion of the diaphragm. The piezoelectric element has an asymmetric octagonal profile including a pair of long side portions opposing each other, a pair of short side portions opposing each other, and four connecting side portions.Type: ApplicationFiled: August 2, 2012Publication date: August 28, 2014Applicants: ANDEN CO., LTD., HOKURIKU ELECTRIC INDUSTRY CO., LTD.Inventors: Tadao Sunahara, Masahide Tamura, Osamu Kawasaki, Masaru Tsuchiya, Ryuta Suzuki, Makoto Tsuruta, Nobuhiro Miwa, Hitoshi Sakamoto
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Patent number: 8773373Abstract: Provided herein are a display apparatus with a touch panel to which a piezoelectric actuator may readily be mounted, and a piezoelectric actuator used in such a display apparatus with a touch panel. A support structure for supporting a piezoelectric actuator 3 on a front surface of a circuit substrate 5 is constituted from a pair of electrically conductive support members 13A, 13B which are each formed of an electrically conductive foam. The piezoelectric actuator 3 may be mounted by locating the piezoelectric actuator 3 with the pair of electrically conductive support members 13A, 13B attached thereto in a predetermined position on the circuit substrate 5, and connecting the pair of electrically conductive support members 13A, 13B to the pair of output electrodes 5A, 5B of the circuit substrate 5.Type: GrantFiled: June 5, 2008Date of Patent: July 8, 2014Assignee: Hokuriku Electric Industry Co., Ltd.Inventors: Tatsuo Sato, Tadao Sunahara, Yasuyoshi Nabeyama
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Publication number: 20110141046Abstract: Provided herein are a display apparatus with a touch panel to which a piezoelectric actuator may readily be mounted, and a piezoelectric actuator used in such a display apparatus with a touch panel. A support structure for supporting a piezoelectric actuator 3 on a front surface of a circuit substrate 5 is constituted from a pair of electrically conductive support members 13A, 13B which are each formed of an electrically conductive foam. The piezoelectric actuator 3 may be mounted by locating the piezoelectric actuator 3 with the pair of electrically conductive support members 13A, 13B attached thereto in a predetermined position on the circuit substrate 5, and connecting the pair of electrically conductive support members 13A, 13B to the pair of output electrodes 5A, 5B of the circuit substrate 5.Type: ApplicationFiled: June 5, 2008Publication date: June 16, 2011Applicant: HOKURIKU ELECTRIC INDUSTRY CO., LTD.Inventors: Tatsuo Sato, Tadao Sunahara, Yasuyoshi Nabeyama
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Patent number: 6275594Abstract: A piezoelectric acoustic device capable of permitting an increase in area or space of an operation face section of an electronic equipment required for arranging parts for the electronic equipment, attaining small-sizing of an electronic equipment and minimizing intrusion of water and dust into a front air chamber through a drum. The piezoelectric acoustic device includes a piezoelectric vibrator including a metal vibrating plate and a piezoelectric ceramic element joined to the metal vibrating plate, a casing including a front side wall and a rear side wall arranged on both sides of the piezoelectric vibrator so as to define a space therebetween in which the piezoelectric vibrator is received, and a drum arranged on an outside of the front side wall so as to extend in a direction across the front side wall. The piezoelectric vibrator and front side wall are arranged so as to define a chamber therebetween and the drum is formed therein with a passage in a manner to communicate with the chamber.Type: GrantFiled: March 2, 1999Date of Patent: August 14, 2001Assignee: Hokuriku Electric Industry Co., Ltd.Inventors: Masao Senoo, Tsuyoshi Yamashita, Tadao Sunahara
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Patent number: 6205226Abstract: A piezoelectric acoustic device capable of keeping a substantial diameter of a metal vibrating plate from being reduced and preventing clogging of a damping cloth member. The piezoelectric acoustic device includes a piezoelectric vibrator including a metal vibrating plate and a piezoelectric ceramic element joined to the metal vibrating plate. The piezoelectric vibrator is arranged in a casing which is formed on an inner peripheral surface thereof with an inclined joint surface section of an annular shape which surrounds an outer peripheral portion of the metal vibrating plate. The piezoelectric acoustic device also includes a pressure-sensitive adhesive layer formed by coating a pressure-sensitive adhesive on the inclined joint surface section. The outer peripheral portion of the metal vibrating plate is joined through the pressure-sensitive adhesive layer to the inclined joint surface section.Type: GrantFiled: March 19, 1999Date of Patent: March 20, 2001Assignee: Hokuriku Electric Industry Co., Ltd.Inventors: Masao Senoo, Tsuyoshi Yamashita, Tadao Sunahara
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Patent number: 6147439Abstract: A piezoelectric substrate supporting structure for piezoelectric transformer is provided which, in the supporting and fixing of a piezoelectric substrate on a base plate or in an outer trim case, does not inhibit the vibration of the piezoelectric substrate, exhibits high impact resistance and enables stable supporting, is free from performance deterioration and enables simultaneously and easily performing an electrode takeoff from the piezoelectric substrate. Further, a piezoelectric transformer including the above piezoelectric substrate supporting structure is provided.Type: GrantFiled: June 23, 1998Date of Patent: November 14, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Shusaku Takagi, Masamitsu Tanaka, Sigeru Bando, Tadao Sunahara, Katsuo Kono, Mitsunobu Yoshida, Yasushi Iwata