Patents by Inventor Hirokazu Hagiwara
Hirokazu Hagiwara 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: 11339676Abstract: This aircraft gas turbine is provided with a rotor, a rotor blade (24), a casing, a stationary blade (26), and a guide member (53). The rotor blade (24) has fins (43) projecting from the outer peripheral surface (42a) of a rotor blade shroud (42). A stationary blade shroud (51) of the stationary blade (26) forms a cavity (Ct) with at least the rotor blade shroud (42) and the fins (43). The guide member (53) is provided inside the cavity (Ct) and extends inward from the radial outer side, and an inner-side end part (53a) on the radial inner side faces the outer peripheral surface (42a) of the rotor blade shroud (42) with a gap therebetween.Type: GrantFiled: December 4, 2018Date of Patent: May 24, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES AERO ENGINES, LTD.Inventors: Daigo Fujimura, Takaaki Hase, Hirokazu Hagiwara
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Publication number: 20210180464Abstract: This aircraft gas turbine is provided with a rotor, a rotor blade (24), a casing, a stationary blade (26), and a guide member (53). The rotor blade (24) has fins (43) projecting from the outer peripheral surface (42a) of a rotor blade shroud (42). A stationary blade shroud (51) of the stationary blade (26) forms a cavity (Ct) with at least the rotor blade shroud (42) and the fins (43). The guide member (53) is provided inside the cavity (Ct) and extends inward from the radial outer side, and an inner-side end part (53a) on the radial inner side faces the outer peripheral surface (42a) of the rotor blade shroud (42) with a gap therebetween.Type: ApplicationFiled: December 4, 2018Publication date: June 17, 2021Inventors: Daigo FUJIMURA, Takaaki HASE, Hirokazu HAGIWARA
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Patent number: 9360216Abstract: A gas turbine includes downstream side members that face a passage and have guide faces arranged in the passage side as it goes toward the upstream side. In a cross section including an axis center of a rotor shaft extending in a flow direction of a gas main stream, extension sections of the guide faces continuing to the upstream end portion of the guide faces are arranged downstream from the cavity inner wall portion of the upstream side member facing the cavities.Type: GrantFiled: May 29, 2013Date of Patent: June 7, 2016Assignee: Mitsubishi Heavy Industries Aero Engines, Ltd.Inventors: Takaaki Hase, Yoshihiro Kuwamura, Osamu Morii, Tadayuki Hanada, Hirokazu Hagiwara
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Patent number: 9114500Abstract: A sander is of a palm type, and its upper portion is configured as a holding portion. A battery attachment portion to which a battery having an elongated shape is attachable is oriented at an angle not less than 0 degrees with respect to a vertical direction, such that if a longitudinal direction of the battery is angled, a lower portion of the battery is in a position shifted inward farther than an upper portion of the battery.Type: GrantFiled: December 18, 2012Date of Patent: August 25, 2015Assignee: MAKITA CORPORATIONInventors: Fumihide Sugita, Masahiko Inai, Hirokazu Hagiwara
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Publication number: 20140020392Abstract: A gas turbine includes downstream side members that face a passage and have guide faces arranged in the passage side as it goes toward the upstream side. In a cross section including an axis center of a rotor shaft extending in a flow direction of a gas main stream, extension sections of the guide faces continuing to the upstream end portion of the guide faces are arranged downstream from the cavity inner wall portion of the upstream side member facing the cavities.Type: ApplicationFiled: May 29, 2013Publication date: January 23, 2014Inventors: Takaaki HASE, Yoshihiro KUWAMURA, Osamu MORII, Tadayuki HANADA, Hirokazu HAGIWARA
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Patent number: 8251781Abstract: A clamp device for a sander includes: a clamp body slidable on a plate between a clamping position and an unclamping position at which positions a clamp strip contacts with or is away from a side surface of the plate; a support shaft provided on the plate close to the clamp body; an operating member having a first and second ends and rotatably connected to the support shaft, the first end being a connecting end connected to the clamp body, and the second end being an operating end extending above the clamp body, so that the operating member is elastically deformable in an expanding and contracting directions between the connecting end and the operating end; and an engagement member provided on the plate opposite to the support shaft and engageable with the operating end of the operating member while an intermediate portion of the operating member is being compressed.Type: GrantFiled: February 19, 2010Date of Patent: August 28, 2012Assignee: Makita CorporationInventor: Hirokazu Hagiwara
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Patent number: 8197310Abstract: A dust box includes: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle. The dust-collecting portion mainly consists of a box which is made of synthetic resin and configured to be detachably connected to the attachment portion, and a paper bag received in the box and configured to store the dust particles to be discharged from the nozzle.Type: GrantFiled: October 14, 2011Date of Patent: June 12, 2012Assignee: Makita CorporationInventors: Yukio Yamashiro, Hirokazu Hagiwara, Yoshifumi Morita, Takashi Kumagai
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Patent number: 8128339Abstract: To provide a bearing support structure and a gas turbine that prevent damage of device induced by a rotor shaft when the rotor shaft is unbalanced, the bearing support structure and the gas turbine includes: a casing (7) formed in a cylindrical shape; a bearing unit (8) formed in a cylindrical shape and housed in the casing (7); a rotation shaft (5) rotatably supported by the bearing unit (8); and a reaction-force decreasing unit (13) that connects the casing and the bearing unit, and is configured to decrease a radial reaction force on the bearing unit side.Type: GrantFiled: July 11, 2007Date of Patent: March 6, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Mitsuru Kondo, Hiroji Tada, Osamu Morii, Tadayuki Hanada, Hirokazu Hagiwara, Kunihiro Shimizu, Tomohiro Imae
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Publication number: 20120034856Abstract: A dust box includes: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle.Type: ApplicationFiled: October 14, 2011Publication date: February 9, 2012Applicant: MAKITA CORPORATIONInventors: Yukio Yamashiro, Hirokazu Hagiwara, Yoshifumi Morita, Takashi Kumagai
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Patent number: 8066554Abstract: A dust box includes: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle. The dust-collecting portion mainly consists of a box which is made of synthetic resin and configured to be detachably connected to the attachment portion, and a paper bag received in the box and configured to store the dust particles to be discharged from the nozzle.Type: GrantFiled: April 27, 2009Date of Patent: November 29, 2011Assignee: Makita CorporationInventors: Yukio Yamashiro, Hirokazu Hagiwara, Yoshifumi Morita, Takashi Kumagai
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Patent number: 7819725Abstract: A motor is disposed in a main body and has a rotary shaft. A base is disposed below the main body. The base is coupled to the rotary shaft and adapted to make eccentric motions in accordance with rotations of the rotary shaft. A first receptacle is disposed in the main body. A second receptacle is disposed in the base. A foot is disposed between the first receptacle and the second receptacle. The foot includes a foot body made of metal, and elastic members provided on both ends of the foot body and respectively fitted into the first receptacle and the second receptacle, so that the foot body is pivotably supported between the first receptacle and the second receptacle. An elastic sleeve is fitted onto a part of an outer periphery of the foot body while being compressed by the first receptacle and the second receptacle.Type: GrantFiled: August 29, 2007Date of Patent: October 26, 2010Assignee: Makita CorporationInventors: Hirokazu Hagiwara, Hiroshi Nojiri
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Publication number: 20100233944Abstract: A clamp device for a sander includes: a clamp body slidable on a plate between a clamping position and an unclamping position at which positions a clamp strip contacts with or is away from a side surface of the plate; a support shaft provided on the plate close to the clamp body; an operating member having a first and second ends and rotatably connected to the support shaft, the first end being a connecting end connected to the clamp body, and the second end being an operating end extending above the clamp body, so that the operating member is elastically deformable in an expanding and contracting directions between the connecting end and the operating end; and an engagement member provided on the plate opposite to the support shaft and engageable with the operating end of the operating member while an intermediate portion of the operating member is being compressed.Type: ApplicationFiled: February 19, 2010Publication date: September 16, 2010Applicant: MAKITA CORPORATIONInventor: Hirokazu HAGIWARA
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Publication number: 20090298403Abstract: A dust box includes: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle. The dust-collecting portion mainly consists of a box which is made of synthetic resin and configured to be detachably connected to the attachment portion, and a paper bag received in the box and configured to store the dust particles to be discharged from the nozzle.Type: ApplicationFiled: April 27, 2009Publication date: December 3, 2009Applicant: MAKITA CORPORATIONInventors: Yukio Yamashiro, Hirokazu Hagiwara, Yoshifumi Morita, Takashi Kumagai
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Publication number: 20090246018Abstract: To provide a bearing support structure and a gas turbine that prevent damage of device induced by a rotor shaft when the rotor shaft is unbalanced, the bearing support structure and the gas turbine includes: a casing (7) formed in a cylindrical shape; a bearing unit (8) formed in a cylindrical shape and housed in the casing (7); a rotation shaft (5) rotatably supported by the bearing unit (8); and a reaction-force decreasing unit (13) that connects the casing and the bearing unit, and is configured to decrease a radial reaction force on the bearing unit side.Type: ApplicationFiled: July 11, 2007Publication date: October 1, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mitsuru Kondo, Hiroji Tada, Osamu Morii, Tadayuki Hanada, Hirokazu Hagiwara, Kunihiro Shimizu, Tomohiro Imae
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Publication number: 20080057841Abstract: A motor is disposed in a main body and has a rotary shaft. A base is disposed below the main body. The base is coupled to the rotary shaft and adapted to make eccentric motions in accordance with rotations of the rotary shaft. A first receptacle is disposed in the main body. A second receptacle is disposed in the base. A foot is disposed between the first receptacle and the second receptacle. The foot includes a foot body made of metal, and elastic members provided on both ends of the foot body and respectively fitted into the first receptacle and the second receptacle, so that the foot body is pivotably supported between the first receptacle and the second receptacle. An elastic sleeve is fitted onto a part of an outer periphery of the foot body while being compressed by the first receptacle and the second receptacle.Type: ApplicationFiled: August 29, 2007Publication date: March 6, 2008Applicant: MAKITA CORPORATIONInventors: Hirokazu Hagiwara, Hiroshi Nojiri
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Patent number: D527966Type: GrantFiled: January 17, 2006Date of Patent: September 12, 2006Assignee: Makita CorporationInventors: Naohiro Hayakawa, Hirokazu Hagiwara
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Patent number: D567047Type: GrantFiled: August 9, 2007Date of Patent: April 22, 2008Assignee: Makita CorporationInventors: Shinsuke Okuda, Hirokazu Hagiwara
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Patent number: D609071Type: GrantFiled: September 9, 2009Date of Patent: February 2, 2010Assignee: Makita CorporationInventors: Yuji Yamamoto, Hirokazu Hagiwara
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Patent number: D413779Type: GrantFiled: October 13, 1998Date of Patent: September 14, 1999Assignee: Makita CorporationInventors: Naohiro Hayakawa, Hirokazu Hagiwara