Patents by Inventor Yuuichi Yanagase
Yuuichi Yanagase 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: 10718329Abstract: A scroll compressor is provided which includes: a revolving scroll, a fixed scroll, an autorotation preventing mechanism, a frame, a crank shaft provided with an eccentric pin portion which is eccentric with respect to an axis, the crank shaft being provided with a flange portion at a lower portion of the eccentric pin portion, the flange portion being larger than the diameter of the eccentric pin portion, a balance weight mounted on the flange portion, a sealing member performing sealing between the revolving scroll and the flange portion, and a thrust bearing arranged between the frame and the flange portion. The scroll compressor reduces the amount of oil flowing into a back pressure chamber, thereby improving the performance of the scroll compressor.Type: GrantFiled: May 13, 2016Date of Patent: July 21, 2020Assignee: HITACHI-JOHNSON CONTROLS AIR CONDITIONG, INC.Inventors: Yasunori Nakano, Satoshi Nakamura, Takamasa Adachi, Masatsugu Chikano, Yuuichi Yanagase
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Patent number: 10316841Abstract: An object of the invention is to provide a compressor that includes a corrosion-resistant film formed on the surface of a casing having a complicated shape. A compressor pumps gas in a compression chamber formed by a casing, the casing is made of cast iron, and a layer made of a mixture of iron nitride and a compound of iron, nitrogen, and carbon and an oxide layer made of triiron tetraoxide are formed on the surface of the casing. Accordingly, since the corrosion resistance of the casing, which includes a film formed by a gas soft-nitriding treatment and an oxidation treatment, is improved, the generation of rust is suppressed. Therefore, it is possible to provide a compressor in which galling or sticking caused by rust occurs less.Type: GrantFiled: October 23, 2015Date of Patent: June 11, 2019Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Yukiko Ikeda, Masakatsu Okaya, Yuuichi Yanagase
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Publication number: 20180128269Abstract: A scroll compressor is provided which includes: a revolving scroll, a fixed scroll, an autorotation preventing mechanism, a frame, a crank shaft provided with an eccentric pin portion which is eccentric with respect to an axis, the crank shaft being provided with a flange portion at a lower portion of the eccentric pin portion, the flange portion being larger than the diameter of the eccentric pin portion, a balance weight mounted on the flange portion, a sealing member performing sealing between the revolving scroll and the flange portion, and a thrust bearing arranged between the frame and the flange portion. The scroll compressor reduces the amount of oil flowing into a back pressure chamber, thereby improving the performance of the scroll compressor.Type: ApplicationFiled: May 13, 2016Publication date: May 10, 2018Inventors: Yasunori NAKANO, Satoshi NAKAMURA, Takamasa ADACHI, Masatsugu CHIKANO, Yuuichi YANAGASE
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Patent number: 9945378Abstract: Provided is a scroll compressor capable of ensuring reliability of a release valve device. The scroll compressor is provided with: an orbiting scroll having an orbiting scroll wrap; a fixed roll having a fixed scroll wrap intermeshing with the orbiting scroll wrap; a release hole formed in the fixed scroll; a housing hole communicating with the release hole and having larger diameter than that of the release hole; a valve seat member which is housed in the housing hole and has a valve seat surface; a valve plate contacting with or separating from the valve seat surface by a pressure difference; a spring for pressing the valve plate against the valve seat surface; a stopper which is equipped with the spring and secures the valve seat member; and a retainer for securing the stopper.Type: GrantFiled: September 12, 2013Date of Patent: April 17, 2018Assignee: Johnson Controls-Hitachi Air Conditioning Technology (Hong Kong) LimitedInventors: Takeshi Kouno, Tsutomu Nozaki, Yuuichi Yanagase
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Publication number: 20160201678Abstract: Provided is a scroll compressor capable of ensuring reliability of a release valve device. The scroll compressor is provided with: an orbiting scroll having an orbiting scroll wrap; a fixed roll having a fixed scroll wrap intermeshing with the orbiting scroll wrap; a release hole formed in the fixed scroll; a housing hole communicating with the release hole and having larger diameter than that of the release hole; a valve seat member which is housed in the housing hole and has a valve seat surface; a valve plate contacting with or separating from the valve seat surface by a pressure difference; a spring for pressing the valve plate against the valve seat surface; a stopper which is equipped with the spring and secures the valve seat member; and a retainer for securing the stopper.Type: ApplicationFiled: September 12, 2013Publication date: July 14, 2016Inventors: Takeshi KOUNO, Tsutomu NOZAKI, Yuuichi YANAGASE
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Publication number: 20160115950Abstract: An object of the invention is to provide a compressor that includes a corrosion-resistant film formed on the surface of a casing having a complicated shape. A compressor pumps gas in a compression chamber formed by a casing, the casing is made of cast iron, and a layer made of a mixture of iron nitride and a compound of iron, nitrogen, and carbon and an oxide layer made of triiron tetraoxide are formed on the surface of the casing. Accordingly, since the corrosion resistance of the casing, which includes a film formed by a gas soft-nitriding treatment and an oxidation treatment, is improved, the generation of rust is suppressed. Therefore, it is possible to provide a compressor in which galling or sticking caused by rust occurs less.Type: ApplicationFiled: October 23, 2015Publication date: April 28, 2016Inventors: Yukiko IKEDA, Masakatsu OKAYA, Yuuichi YANAGASE
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Patent number: 8740594Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.Type: GrantFiled: December 6, 2011Date of Patent: June 3, 2014Assignee: Hitachi Appliances, Inc.Inventors: Satoshi Nakamura, Mutsunori Matsunaga, Takeshi Tsuchiya, Yuuichi Yanagase, Masatsugu Chikano
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Patent number: 8241021Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is placed at the compression part in the hermetic container.Type: GrantFiled: October 4, 2010Date of Patent: August 14, 2012Assignee: Hitachi Appliances, Inc.Inventors: Takeshi Tsuchiya, Yuuichi Yanagase, Kazuyuki Fujimura, Mutsunori Matsunaga, Shigekazu Nozawa, Kenji Tojo, Haruo Koharagi, Satoshi Kikuchi, Hirokatsu Kohsokabe
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Patent number: 8152502Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.Type: GrantFiled: February 26, 2009Date of Patent: April 10, 2012Assignee: Hitachi Appliances, Inc.Inventors: Satoshi Nakamura, Mutsunori Matsunaga, Takeshi Tsuchiya, Yuuichi Yanagase, Masatsugu Chikano
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Publication number: 20120082578Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.Type: ApplicationFiled: December 6, 2011Publication date: April 5, 2012Inventors: Satoshi Nakamura, Mutsunori MATSUNAGA, Takeshi TSUCHIYA, Yuuichi YANAGASE, Masatsugu CHIKANO
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Patent number: 8033796Abstract: To maintain the functionality as a compact and inexpensive motor-mounted internal gear pump and also offer further inexpensiveness and reliability. The motor-mounted internal gear pump 80 has a pump part 81 including: an inner rotor 1, an outer rotor 2, a pump casing and an internal shaft 5. The pump casing has flat inner surfaces facing both end faces of the inner rotor 1 and the outer rotor 2. The internal shaft 5 includes a bearing 51 which is inserted into an axial hole of the inner rotor 1 and a fitting part 53 extending from both its ends in both axial directions. The pump casing includes two pump casing members 3, 4 as separate members with flat inner surfaces 25, 26 respectively.Type: GrantFiled: May 30, 2006Date of Patent: October 11, 2011Assignee: Hitachi, Ltd.Inventors: Hirotaka Kameya, Masato Nakanishi, Yuuichi Yanagase, Eiji Sato, Kouji Aizawa
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Publication number: 20110020161Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is placed at the compression part in the hermetic container.Type: ApplicationFiled: October 4, 2010Publication date: January 27, 2011Applicant: Hitachi Appliances, Inc.Inventors: Takeshi TSUCHIYA, Yuuichi Yanagase, Kazuyuki Fujimura, Mutsunori Matsunaga, Shigekazu Nozawa, Kenji Tojo, Haruo Koharagi, Satoshi Kikuchi, Hirokatsu Kohsokabe
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Publication number: 20090246059Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.Type: ApplicationFiled: February 26, 2009Publication date: October 1, 2009Inventors: Satoshi Nakamura, Mutsunori Matsunaga, Takeshi Tsuchiya, Yuuichi Yanagase, Masatsugu Chikano
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Publication number: 20090010776Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is placed at the compression part in the hermetic container.Type: ApplicationFiled: September 10, 2008Publication date: January 8, 2009Applicant: Hitachi Appliances, Inc.Inventors: Takeshi Tsuchiya, Yuuichi Yanagase, Kzuyuki Fujimura, Mutsunori Matsunaga, Shigekazu Nozawa, Kenji Tojo, Haruo Koharagi, Satoshi Kikuchi, Hirokatsu Kohsokabe
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Patent number: 7442017Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is-placed at the compression part in the hermetic container.Type: GrantFiled: December 27, 2005Date of Patent: October 28, 2008Assignee: Hitachi Appliances, Inc.Inventors: Takeshi Tsuchiya, Yuuichi Yanagase, Kazuyuki Fujimura, Mutsunori Matsunaga, Shigekazu Nozawa, Kenji Tojo, Haruo Koharagi, Satoshi Kikuchi, Hirokatsu Kohsokabe
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Publication number: 20080159885Abstract: A motor-integrated internal gear pump that is inexpensive and highly reliable while maintaining characteristics of small size and inexpensive functions. The motor-integrated internal gear pump (80) has a pump section (81) with an inner rotor (1), an outer rotor (2), a pump casing, and an inner shaft (5). The pump casing has flat inner surfaces facing both end surfaces of each of the inner rotor (1) and the outer rotor (2). The inner shaft (5) has a bearing section (51) inserted into a shaft hole of the inner rotor (1) and fitting sections extending axially outward from both end surfaces of the inner shaft (51). The pump casing is constructed from two pump casing members (3, 4) where the flat inner surfaces (25, 26) are formed as separate members.Type: ApplicationFiled: May 30, 2006Publication date: July 3, 2008Applicant: Hitachi, Ltd.Inventors: Hirotaka Kameya, Masato Nakanishi, Yuuichi Yanagase, Eiji Sato, Kouji Aizawa
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Publication number: 20080159884Abstract: A motor-mounted internal gear pump 80 includes: a pump part 81 which sucks and discharges hydraulic fluid; and a motor part 82 which drives the pump 81. The pump part 81 includes: an inner rotor 1 with teeth on its outer surface; an outer rotor 2 with teeth on its inner surface to mesh with the teeth of the inner rotor; and pump casings 3, 4 which house the inner rotor 1 and the outer rotor 2. The motor part 82 includes a rotator 11 and a stator 12 which rotates the rotator 11. A common member 112 of permanent magnet material as resin containing magnetic powder serves as the rotator 11 and the outer rotor 2. This structure assures further inexpensiveness and reliability while maintaining compactness and inexpensiveness in functions.Type: ApplicationFiled: June 29, 2006Publication date: July 3, 2008Applicant: Hitachi, Ltd.Inventors: Masato Nakanishi, Hirotaka Kameya, Yuuichi Yanagase, Eiji Sato, Kouji Aizawa
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Patent number: 7163386Abstract: A scroll compressor has a movable auxiliary member provided by mounting it between a frame member and a circling scroll member. The movable auxiliary member has a stopper portion for causing a contact plane to contact a pane of a fixed scroll member and a ring portion having an opposed plane annularly formed to face the pane of the circling scroll member, is further supported elastically by an elastic support in a state of being energized in a direction of the circling scroll member, has the contact plane of the stopper portion caused to contact the pane in this elastic support state to keep a limit position with the opposed plane facing the pane of the circling scroll member, and goes back elastically to the frame member side when the circling scroll member goes back to the frame member side and the pane is pressed to contact the opposed plane.Type: GrantFiled: February 25, 2005Date of Patent: January 16, 2007Assignee: Hitachi Appliances, Inc.Inventors: Takeshi Tsuchiya, Yuuichi Yanagase, Kazuyuki Fujimura, Makoto Aoki, Shigekazu Nozawa, Mutsunori Matsunaga, Satoshi Nakamura, Masaru Ohtahara, Shuuji Hasegawa, Yoshinobu Yosuke
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Publication number: 20060140810Abstract: The invention relates to a pump which assures high reliability while maintaining the functionality as a compact, inexpensive motor-mounted internal gear pump. The pump includes an inner rotor with teeth on its outer surface, an outer rotor with teeth on its inner surface to engage with the inner rotor teeth, a pump casing housing both the rotors, and an inner rotor support shaft which pivotally supports the inner rotor. The motor includes a rotator located inside the pump casing, and a stator located outside the pump casing. The pump casing includes two casing members which face both side faces of the outer rotor and the inner rotor and have an outer rotor bearing which pivotally supports both sides of the outer rotor. The inner rotor support shaft has an inner rotor bearing eccentric to the outer rotor to support the inner rotor pivotally in a rotatable manner and connects the two casing members virtually concentrically with the outer rotor bearing.Type: ApplicationFiled: December 27, 2005Publication date: June 29, 2006Applicants: Hitachi, Ltd., Taiwan Hitachi Co., Ltd.Inventors: Hirotaka Kameya, Masato Nakanishi, Eiji Sato, Yuuichi Yanagase, Kouji Aizawa
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Publication number: 20060140792Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is-placed at the compression part in the hermetic container.Type: ApplicationFiled: December 27, 2005Publication date: June 29, 2006Applicant: Hitachi Air Conditioning Systems Co., Ltd.Inventors: Takeshi Tsuchiya, Yuuichi Yanagase, Kazuyuki Fujimura, Mutsunori Matsunaga, Shigekazu Nozawa, Kenji Tojo, Haruo Koharagi, Satoshi Kikuchi, Hirokatsu Kohsokabe