Patents by Inventor Masato Komazawa
Masato Komazawa 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: 9242463Abstract: A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.Type: GrantFiled: March 26, 2014Date of Patent: January 26, 2016Assignee: SEIKO EPSON CORPORATIONInventors: Manabu Munakata, Hajime Nakao, Takaaki Koizumi, Masato Komazawa
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Publication number: 20140362138Abstract: A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.Type: ApplicationFiled: March 26, 2014Publication date: December 11, 2014Applicants: NGK INSULATORS, LTD., SEIKO EPSON CORPORATIONInventors: Manabu MUNAKATA, Hajime NAKAO, Takaaki KOIZUMI, Masato KOMAZAWA
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Patent number: 7424827Abstract: In an inspecting method of a piezoelectric/electrostrictive actuator having a piezoelectric/electrostrictive element and two or more electrodes, the frequency response characteristics is picked up when a vibration is given to the piezoelectric/electrostrictive actuator, and the amount of displacement of the piezoelectric/electrostrictive actuator is predicted by the frequency response characteristics. The piezoelectric/electrostrictive actuator is precisely inspected without dissolution and destruction and without actual driving as a product.Type: GrantFiled: April 27, 2005Date of Patent: September 16, 2008Assignee: NGK Insulators, Ltd.Inventors: Tomohiro Yamada, Masato Komazawa, Tetsuya Hatta, Takatoshi Nehagi
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Publication number: 20050284224Abstract: In an inspecting method of a piezoelectric/electrostrictive actuator having a piezoelectric/electrostrictive element and two or more electrodes, the frequency response characteristics is picked up when a vibration is given to the piezoelectric/electrostrictive actuator, and the amount of displacement of the piezoelectric/electrostrictive actuator is predicted by the frequency response characteristics. The piezoelectric/electrostrictive actuator is precisely inspected without dissolution and destruction and without actual driving as a product.Type: ApplicationFiled: April 27, 2005Publication date: December 29, 2005Applicant: NGK Insulators, Ltd.Inventors: Tomohiro Yamada, Masato Komazawa, Tetsuya Hatta, Takatoshi Nehagi
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Patent number: 6570297Abstract: A piezoelectric/electrostrictive device (P/E) includes driving, movable and fixing portions. One end of a first P/E element and P/E operating portion on the end are positioned on the fixing portion and an opposite end of the P/E operating portion of the first P/E element is positioned on a first thin plate portion. One end of a second P/E element and P/E operating portion on the end are positioned on the movable portion and an opposite end of the P/E operating portion of the second P/E element is positioned on a second thin plate portion. A hole formed by inner walls of the driving, movable and fixing portions has a central axis that extends in an axial direction substantially parallel to the thin plate portions and substantially perpendicular to the length direction, and the device is free of any other holes extending in any direction other than the axial direction.Type: GrantFiled: August 21, 2000Date of Patent: May 27, 2003Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Publication number: 20020190609Abstract: A piezoelectric/electrostrictive device including a driving portion, a movable portion, and a fixing portion for holding the driving portion and the movable portion, the fixing portion and the movable portion being coupled via the driving portion along a length direction of the device. It is preferred that the driving portion, the movable portion and the fixing portion are made of electrically insulating materials. The driving portion is composed of a mutually opposed pair of thin plate portions and at least first and second piezoelectric/electrostrictive elements. Each of the piezoelectric/electrostrictive elements includes an operating portion having a width that is substantially the same as the width of each respective thin plate portion.Type: ApplicationFiled: July 23, 2002Publication date: December 19, 2002Applicant: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6476539Abstract: Provided is a piezoelectric/electrostrictive device comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated based on a drive of the driving portion, and a fixing portion for holding the driving portion and the movable portion, the fixing portion and the movable portions being coupled via the driving portion, and a hole being formed by an inner wall of the driving portion, inner wall of the movable portion, and inner walls of the fixing portion. The driving portion comprises a pair of mutually opposing thin plate portions and at least two piezoelectric/electrostrictive elements each comprising at least one or more pairs of electrodes and a piezoelectric/electrostrictive layer provided on the thin plate portions.Type: GrantFiled: August 21, 2000Date of Patent: November 5, 2002Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6452309Abstract: A piezoelectric/electrostrictive device is disclosed comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated by a drive of the driving portion, a fixing portion for holding the driving portion and the movable portion, the movable portion being coupled with the fixing portion via the driving portion, and a hole formed by inner walls of the driving portion, an inner wall of the movable portion, and an inner wall of the fixing portion.Type: GrantFiled: July 28, 2000Date of Patent: September 17, 2002Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6441537Abstract: A piezoelectric/electrostrictive actuator including a ceramic substrate, and at least one piezoelectric/electrostrictive actuator unit formed on at least a portion of at least one surface of the substrate, each piezoelectric/electrostrictive actuator unit having a first electrode film, a piezoelectric/electrostrictive film and a second electrode film which are laminated in the order of description, with the piezoelectric/electrostrictive actuator unit formed on the substrate by heat treatment.Type: GrantFiled: February 2, 1995Date of Patent: August 27, 2002Assignees: NGK Insulators, Ltd., Seiko Epson Corp.Inventors: Yukihisa Takeuchi, Koji Kimura, Masato Komazawa
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Patent number: 6396193Abstract: A piezoelectric/electrostrictive device includes a driving portion, a movable portion and a fixing portion. The driving portion includes a pair of mutually opposing thin plate portions and a piezoelectric/electrostrictive (P/E) element. A P/E operating portion of the P/E element is arranged on at least a part of an outer surface of at least one of the thin plate portions, such that one end thereof exists on the fixing portion or the movable portion and the other end thereof is arranged on the thin plate portion. At least one end of a P/E layer of the P/E element exists on the fixing portion or the movable portion, and the other end is arranged on the thin plate portion.Type: GrantFiled: July 28, 2000Date of Patent: May 28, 2002Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6351056Abstract: A piezoelectric/electrostrictive device including a driving portion, a movable portion, a fixing portion for holding the driving portion and the movable portion, the movable portion being coupled with the fixing portion via the driving portion, and a hole formed by inner walls of the driving portion, movable portion, and fixing portion. The driving portion includes a pair of mutually opposing thin plate portions and a piezoelectric/electrostrictive (P/E) element. A P/E operating portion of the P/E element is arranged on at least a part of an outer surface of at least one of the thin plate portions, such that one end thereof exists on the fixing portion or the movable portion and the other end thereof is arranged on the thin plate portion. At least one end of a P/E layer of the P/E element exists on the fixing portion or the movable portion, and the other end is arranged on the thin plate portion.Type: GrantFiled: January 28, 2000Date of Patent: February 26, 2002Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6333681Abstract: A piezoelectric/electrostrictive device is disclosed comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated by a drive of the driving portion, a fixing portion for holding the driving portion and the movable portion, the movable portion being coupled with the fixing portion via the driving portion, and a hole formed by inner walls of the driving portion, an inner wall of the movable portion, and an inner wall of the fixing portion.Type: GrantFiled: January 25, 2000Date of Patent: December 25, 2001Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6323582Abstract: Provided is a piezoelectric/electrostrictive device comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated based on a drive of the driving portion, and a fixing portion for holding the driving portion and the movable portion, the fixing portion and the movable portions being coupled via the driving portion, and a hole being formed by an inner wall of the driving portion, inner wall of the movable portion, and inner walls of the fixing portion.Type: GrantFiled: December 28, 1999Date of Patent: November 27, 2001Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Masato Komazawa, Koji Kimura
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Patent number: 6232132Abstract: A method for polarization treatment of a piezoelectric/electrostrictive film type chip, comprising: providing a piezoelectric/electrostrictive film type chip comprising a plurality of piezoelectric/electro-strictive film type elements each having a piezoelec-tric/electrostrictive section constituted by a thin diaphragm, a lower electrode formed on the diaphragm, a piezoelectric/electrostrictive layer formed on the lower electrode, and an upper electrode formed on the piezoelectric/electrostrictive layer, dividing the plurality of piezoelectric/electrostrictive film type elements into two or more element groups, and subjecting each element group to a polarization treatment. The chip after the polarization treatment is low in dielectric breakdown and can be used as a reliable piezoelectric/electrostrictive film type chip.Type: GrantFiled: November 23, 1998Date of Patent: May 15, 2001Assignee: NGK Insulators, Ltd.Inventors: Shinsuke Yano, Toshihisa Mizutani, Masato Komazawa
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Patent number: 5691593Abstract: A piezoelectric/electrostrictive actuator including a ceramic substrate, and at least one piezoelectric/electrostrictive actuator unit formed on at least a portion of at least one surface of the substrate, each piezoelectric/electrostrictive actuator unit having a first electrode film, a piezoelectric/electrostrictive film and a second electrode film which are laminated in the order of description, with the piezoelectric/electrostrictive actuator unit formed on the substrate by heat treatment.Type: GrantFiled: February 22, 1995Date of Patent: November 25, 1997Assignees: NGK Insulators, Ltd., Seiko Epson CorporationInventors: Yukihisa Takeuchi, Koji Kimura, Masato Komazawa
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Patent number: 5631040Abstract: A piezoelectric/electrostrictive actuator comprising a substrate, a plurality of electrodes in the form of strips formed on at least one surface of the substrate such that the electrode strips are spaced from each other in a direction parallel to the substrate surface, and a piezoelectric/electrostrictive portion which is disposed between the adjacent strips of the electrodes in the spacing direction, and in contact with the adjacent electrode strips, so that the piezoelectric/electrostrictive portion produces a flexural displacement or force due to at least the longitudinal mode of converse piezoelectric or electrostrictive effect upon application of a voltage between the adjacent electrode strips.Type: GrantFiled: May 19, 1995Date of Patent: May 20, 1997Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takuchi, Masato Komazawa
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Patent number: 5622748Abstract: A piezoelectric/electrostrictive actuator including a ceramic substrate, and at least one piezoelectric/electrostrictive actuator unit formed on at least a portion of at least one surface of the substrate, each piezoelectric/electrostrictive actuator unit having a first electrode film, a piezoelectric/electrostrictive film and a second electrode film which are laminated in the order of description, with the piezoelectric/electrostrictive actuator unit formed on the substrate by heat treatment.Type: GrantFiled: May 26, 1995Date of Patent: April 22, 1997Assignees: NGK Insulators, Ltd., Seiko Epson CorporationInventors: Yukihisa Takeuchi, Koji Kimura, Masato Komazawa
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Patent number: 5592042Abstract: A piezoelectric/electrostrictive actuator comprising a substrate, a plurality of electrodes in the form of strips formed on at least one surface of the substrate such that the electrode strips are spaced from each other in a direction parallel to the substrate surface, and a piezoelectric/electrostrictive portion which is disposed between the adjacent strips of the electrodes in the spacing direction, and in contact with the adjacent electrode strips, so that the piezoelectric/electrostrictive portion produces a flexural displacement or force due to at least the longitudinal mode of converse piezoelectric or electrostrictive effect upon application of a voltage between the adjacent electrode strips.Type: GrantFiled: September 20, 1993Date of Patent: January 7, 1997Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takuchi, Masato Komazawa