Patents by Inventor Keiji OGUCHI
Keiji OGUCHI 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: 20240074320Abstract: A piezoelectric element includes a piezoelectric body and first, second, third, and fourth electrode layers disposed in the piezoelectric body. Each of the first, second, third, and fourth electrode layers includes a pair of first electrodes and a pair of second electrodes. The first and second electrodes included in the first electrode layer oppose the second and first electrodes included in the second electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the second electrode layer oppose the first and second electrodes included in the third electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the third electrode layer oppose the second and first electrodes included in the fourth electrode layer, respectively, with a part of the piezoelectric body.Type: ApplicationFiled: August 23, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Shuto ONO, Satoshi SASAKI, Yasuyuki SATOH, Keiji OGUCHI
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Publication number: 20230240143Abstract: A piezoelectric actuator includes a piezoelectric element having a rectangular shape, a first supporter, and a second supporter. The piezoelectric element includes a pair of main surfaces opposing each other, a first end surface and a second end surface opposing each other in a long side direction of the pair of main surfaces, and a first side surface and a second side surface opposing each other in a short side direction of the pair of main surfaces. The first supporter is provided to be movable according to deformation of the first end surface. The second supporter is provided to be movable according to deformation of the first side surface. The first supporter includes an opposing portion and a protruding portion. The opposing portion opposes the second supporter in the long side direction. The protruding portion protrudes from the opposing portion and abuts on the second supporter.Type: ApplicationFiled: November 29, 2022Publication date: July 27, 2023Applicant: TDK CORPORATIONInventors: Shuto ONO, Satoshi SASAKI, Yasuyuki SATOH, Keiji OGUCHI
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Publication number: 20220278266Abstract: A laminated piezoelectric element has excellent suppression effect on characteristics deterioration caused by a pyroelectric effect. Inside an element main body are a first internal electrode, a piezoelectric layer, and a second internal electrode that has different polarity from the first internal electrode, which are repeatedly layered a plurality of times along the lamination direction. A first external electrode is formed on a first side surface of the element main body. A second external electrode is formed on a second side surface of the element main body. A resistance layer connected to the internal electrodes is formed in at least part of a third side surface of the element main body in which the internal electrodes are exposed. An insulating layer is formed on a third side of the element main body so as to cover the resistance layer.Type: ApplicationFiled: October 7, 2020Publication date: September 1, 2022Applicant: TDK CORPORATIONInventors: Satoshi MIYAZAKI, Yasuyuki SATOH, Keiji OGUCHI
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Publication number: 20220209097Abstract: A piezoelectric element includes a laminate, a plurality of internal electrodes, and a plurality of external electrodes. The laminate includes a plurality of piezoelectric layers that is laminated. The laminate includes a pair of main faces facing away from each other in a laminating direction of the plurality of piezoelectric layers, a pair of end faces facing away from each other in a first direction crossing the laminating direction, and a pair of side faces facing away from each other in a second direction crossing the laminating direction and the first direction. The plurality of internal electrodes is disposed in the laminate to be laminated in the laminating direction. Each of the pair of main faces, the pair of end faces, and the pair of side faces is a polished surface that is polished. Each ridge portion of the laminate has a rounded chamfered shape.Type: ApplicationFiled: December 22, 2021Publication date: June 30, 2022Applicant: TDK CORPORATIONInventors: Keiji OGUCHI, Yasuyuki SATOH, Satoshi SASAKI
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Publication number: 20220209099Abstract: A piezoelectric element includes a laminate and a first internal electrode. The laminate includes a pair of main faces, a pair of end faces, and a pair of side faces. The first internal electrode includes four electrode portions and a connector. The four electrode portions include a first pair of electrode portions and a second pair of electrode portions. The connector connects the first pair of electrode portions. The connector is spaced apart from each of the second pair of electrode portions by a first distance. Each of the four electrode portions includes a main electrode part. The main electrode part is spaced apart from the pair of end faces by a second distance. The main electrode part is spaced apart from the pair of side faces by a third distance. The first distance is longer than each of the second distance and the third distance.Type: ApplicationFiled: December 22, 2021Publication date: June 30, 2022Applicant: TDK CORPORATIONInventors: Keiji OGUCHI, Yasuyuki SATOH, Satoshi SASAKI
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Patent number: 10686119Abstract: A piezoelectric device includes a body provided with a first region and a second region lined along a first direction. The first region deformably extends/contracts along the first direction. The second region deformably curves in such a manner that one or the other side in a second direction intersecting the first direction curves outward.Type: GrantFiled: June 7, 2017Date of Patent: June 16, 2020Assignee: TDK CORPORATIONInventors: Yoshiki Ohta, Masaichi Miyano, Keiji Oguchi
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Publication number: 20170358733Abstract: A piezoelectric device includes a body provided with a first region and a second region lined along a first direction. The first region deformably extends/contracts along the first direction. The second region deformably curves in such a manner that one or the other side in a second direction intersecting the first direction curves outward.Type: ApplicationFiled: June 7, 2017Publication date: December 14, 2017Applicant: TDK CORPORATIONInventors: Yoshiki OHTA, Masaichi MIYANO, Keiji OGUCHI
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Patent number: 9735337Abstract: A piezoelectric actuator comprises a substantially rectangular parallelepiped piezoelectric element. One outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to an active portion in the one outer surface. The second region has a flat surface configured to come into contact with a body to be driven and to generate a frictional force therewith. The flat surface is shorter in a longitudinal direction of the piezoelectric element than in a lateral direction thereof. The flat surface is longer in the longitudinal direction of the piezoelectric element at a lateral center region thereof than at a lateral end region thereof.Type: GrantFiled: July 18, 2014Date of Patent: August 15, 2017Assignee: TDK CORPORATIONInventors: Yoshiki Ikeda, Keiji Oguchi
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Publication number: 20150028723Abstract: A piezoelectric actuator comprises a substantially rectangular parallelepiped piezoelectric element. One outer surface of the piezoelectric element includes a first region, and a second region located such as to project from the first region and to overlap a region corresponding to an active portion in the one outer surface. The second region has a flat surface configured to come into contact with a body to be driven and to generate a frictional force therewith. The flat surface is shorter in a longitudinal direction of the piezoelectric element than in a lateral direction thereof. The flat surface is longer in the longitudinal direction of the piezoelectric element at a lateral center region thereof than at a lateral end region thereof.Type: ApplicationFiled: July 18, 2014Publication date: January 29, 2015Inventors: Yoshiki IKEDA, Keiji OGUCHI