Patents by Inventor Yuji Hamayama
Yuji Hamayama 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: 8405283Abstract: A flexural vibration piece includes a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on the first region and a compressive stress acts thereon when a tensile stress acts on the first region, and performs flexural vibration in a first plane. The flexural vibration piece also includes a heat conduction path, in the vicinity of the first region and the second region, that is formed of a material having a thermal conductivity higher than that of the flexural vibrator and thermally connects between the first region and the second region.Type: GrantFiled: June 27, 2012Date of Patent: March 26, 2013Assignee: Seiko Epson CorporationInventors: Makoto Furuhata, Takashi Yamazaki, Yuji Hamayama
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Patent number: 8362854Abstract: A flexural vibration piece including a vibrator having a first region on which a compressive stress or a tensile stress acts and a second region on which a tensile stress acts when a compressive stress acts on the first region and a compressive stress acts when a tensile stress acts on the first region, and performs flexural vibration in a first plane; and a heat conduction path formed of a material having a thermal conductivity higher than the vibrator and that thermally connects the regions, wherein when m is the number of heat conduction paths, ?th is the thermal resistivity of the heat conduction path, ?v is the thermal resistivity of the vibrator, tv is the thickness of the vibrator in a direction orthogonal to the first plane, and tth is the thickness of the heat conduction path, a relationship of tth?(1/m)×tv×(?th/?v) is satisfied.Type: GrantFiled: March 23, 2010Date of Patent: January 29, 2013Assignees: Epson Toyocom Corporation, Seiko Epson CorporationInventors: Makoto Furuhata, Akinori Yamada, Yuji Hamayama
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Publication number: 20120267985Abstract: A flexural vibration piece includes a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on the first region and a compressive stress acts thereon when a tensile stress acts on the first region, and performs flexural vibration in a first plane. The flexural vibration piece also includes a heat conduction path, in the vicinity of the first region and the second region, that is formed of a material having a thermal conductivity higher than that of the flexural vibrator and thermally connects between the first region and the second region.Type: ApplicationFiled: June 27, 2012Publication date: October 25, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Makoto FURUHATA, Takashi YAMAZAKI, Yuji HAMAYAMA
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Patent number: 8294337Abstract: A flexural vibration piece includes a base, and a vibrating arms extending therefrom, each pair of vibrating arms has a first groove formed in the extension direction of the vibrating arm in one main surface following the direction in which the pair of vibrating arms are aligned, and a second groove formed side by side to the first groove in another main surface, the sum of the depths of the first and second groove portions is greater than the interval between the one main surface and the other main surface, and a mass portion is provided on each of the pair of vibrating arms, on the one main surface which is the opening side of the first grooves formed toward the outer sides opposite the inner sides on which the vibrating arms face each other.Type: GrantFiled: March 29, 2010Date of Patent: October 23, 2012Assignee: Seiko Epson CorporationInventors: Hiroki Kawai, Makoto Furuhata, Akinori Yamada, Yuji Hamayama
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Patent number: 8232707Abstract: A flexural vibration piece includes a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on the first region and a compressive stress acts thereon when a tensile stress acts on the first region, and performs flexural vibration in a first plane. The flexural vibration piece also includes a heat conduction path, in the vicinity of the first region and the second region, that is formed of a material having a thermal conductivity higher than that of the flexural vibrator and thermally connects between the first region and the second region.Type: GrantFiled: March 23, 2010Date of Patent: July 31, 2012Assignee: Seiko Epson CorporationInventors: Makoto Furuhata, Takashi Yamazaki, Yuji Hamayama
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Publication number: 20110057549Abstract: A flexural vibration piece includes a base, and a vibrating arms extending therefrom, each pair of vibrating arms has a first groove formed in the extension direction of the vibrating arm in one main surface following the direction in which the pair of vibrating arms are aligned, and a second groove formed side by side to the first groove in another main surface, the sum of the depths of the first and second groove portions is greater than the interval between the one main surface and the other main surface, and a mass portion is provided on each of the pair of vibrating arms, on the one main surface which is the opening side of the first grooves formed toward the outer sides opposite the inner sides on which the vibrating arms face each other.Type: ApplicationFiled: March 29, 2010Publication date: March 10, 2011Applicants: SEIKO EPSON CORPORATION, EPSON TOYOCOM CORPORATIONInventors: Hiroki KAWAI, Makoto FURUHATA, Akinori YAMADA, Yuji HAMAYAMA
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Publication number: 20100244973Abstract: A flexural vibration piece includes: a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on the first region and a compressive stress acts thereon when a tensile stress acts on the first region, and performs flexural vibration in a first plane; and a heat conduction path, in the vicinity of the first region and the second region, that is formed of a material having a thermal conductivity higher than that of the flexural vibrator and thermally connects between the first region and the second region, wherein when m is the number of heat conduction paths, ?th is the thermal conductivity of the heat conduction path, ?v is the thermal conductivity of the flexural vibrator, tv is the thickness of the flexural vibrator in a direction orthogonal to the first plane, and tth is the thickness of the heat conduction path, a relationship of tth?(tv/Type: ApplicationFiled: March 23, 2010Publication date: September 30, 2010Applicants: EPSON TOYOCOM CORPORATION, SEIKO EPSON CORPORATIONInventors: Makoto FURUHATA, Takashi YAMAZAKI, Yuji HAMAYAMA
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Publication number: 20100244989Abstract: A flexural vibration piece includes: a flexural vibrator that has a first region on which a compressive stress or a tensile stress acts due to vibration and a second region having a relationship in which a tensile stress acts thereon when a compressive stress acts on the first region and a compressive stress acts thereon when a tensile stress acts on the first region, and performs flexural vibration in a first plane; and a heat conduction path, between the first region and the second region, that is formed of a material having a thermal conductivity higher than that of the flexural vibrator and thermally connects between the first region and the second region, wherein when m is the number of heat conduction paths, ?th is the thermal resistivity of the heat conduction path, ?v is the thermal resistivity of the flexural vibrator, tv is the thickness of the flexural vibrator in, a direction orthogonal to the first plane, and tth is the thickness of the heat conduction path, a relationship of tth?(1/m)×tv×(?th/?vType: ApplicationFiled: March 23, 2010Publication date: September 30, 2010Applicants: EPSON TOYOCOM CORPORATION, SEIKO EPSON CORPORATIONInventors: Makoto FURUHATA, Akinori YAMADA, Yuji HAMAYAMA