Patents by Inventor Tomohisa Moro
Tomohisa Moro 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: 10677356Abstract: An object of the present invention is to achieve favorable sealability by a simple and low-cost structure using an O-ring. A sealing structure according to the present invention is provided with: a first sealing surface formed in an annular shape on a first container structural member configuring a housing (container); a second sealing surface overlaid on the first sealing surface, formed in annular shape on a second container structural member configuring the housing; a plurality of concentric O-ring grooves formed on at least one of the first sealing surface and second sealing surface; and a plurality of O-rings fitted into the plurality of O-ring grooves. The filling ratio of the O-ring in the O-ring groove positioned on an outer side of the housing is larger than the filling ratio of the O-ring in the O-ring groove positioned on an inner side of the housing.Type: GrantFiled: August 4, 2016Date of Patent: June 9, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Katsuhiro Fujita, Masahiro Kato, Tomohisa Moro, Hideki Suetake
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Publication number: 20180292008Abstract: An object of the present invention is to achieve favorable sealability by a simple and low-cost structure using an O-ring. A sealing structure according to the present invention is provided with: a first sealing surface formed in an annular shape on a first container structural member configuring a housing (container); a second sealing surface overlaid on the first sealing surface, formed in annular shape on a second container structural member configuring the housing; a plurality of concentric O-ring grooves formed on at least one of the first sealing surface and second sealing surface; and a plurality of O-rings fitted into the plurality of O-ring grooves. The filling ratio of the O-ring in the O-ring groove positioned on an outer side of the housing is larger than the filling ratio of the O-ring in the O-ring groove positioned on an inner side of the housing.Type: ApplicationFiled: August 4, 2016Publication date: October 11, 2018Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Katsuhiro FUJITA, Masahiro KATO, Tomohisa MORO, Hideki SUETAKE
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Patent number: 8714950Abstract: A scroll compressor is provided that can reliably prevent a situation in which a product whose performance is degraded due to misassembly of a tip seal is shipped. In the scroll compressor, tip seals of different lengths are embedded in tip surfaces of a fixed spiral wrap of a fixed scroll and an orbiting spiral wrap of an orbiting scroll. Among the tip seals, thicknesses of the shorter tip seals are made thicker than thicknesses of the longer tip seals, and depths of seal grooves in which the tip seals are embedded, respectively, are formed to different depths in correspondence with the thicknesses of the respective tip seals.Type: GrantFiled: May 14, 2010Date of Patent: May 6, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Tomohisa Moro, Norio Hioki, Koji Terasaki, Koryo Shibahara, Tetsuzo Ukai, Katsuhiro Fujita, Takayuki Kuwahara
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Patent number: 8628314Abstract: A scroll compressor includes a housing; a fixed scroll fixed in the housing; an orbiting scroll that has an orbiting end plate on which a spiral orbiting wall is provided upright and that is supported in the housing so as to be able to orbit while being prevented from rotating, in a state where the orbiting wall is engaged with the fixed wall; a suction section that makes refrigerant containing lubricant flow into a suction chamber provided in the housing; and a plurality of supply flow paths that are provided on a sliding surface between the housing and the orbiting end plate and that are connected to the suction chamber.Type: GrantFiled: December 1, 2009Date of Patent: January 14, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Takeuchi, Hiroshi Yamazaki, Shinta Mishima, Tomohisa Moro
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Patent number: 8403655Abstract: A scroll compressor that suffers no decrease in compression performance due to leakage resulting from a twisting assembly error is provided. This scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll.Type: GrantFiled: June 28, 2011Date of Patent: March 26, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Patent number: 8313317Abstract: Provided is a scroll fluid machine that, by using a crankshaft manufactured by cold forging and a needle bearing, can sufficiently exhibit the performance of a variable circling radius mechanism, can provide a sufficient reliability on a bearing portion of the crankshaft, and can be manufactured inexpensively. For this purpose, in a crankshaft 60 used for a driving force transmission system, a reinforced shaft unit 63 and a circular column-like large diameter unit 61 are formed at an end of a rotating shaft 16, a material is produced by a cold forging process so that an eccentric shaft 62 projects from the circular column-like large diameter unit 61, the circular column-like large diameter unit 61 is rotatably coupled to a housing 11 via a needle bearing 64, and the variable circling radius mechanism is stably operated with rigidity increased by the reinforced shaft unit 63.Type: GrantFiled: November 29, 2007Date of Patent: November 20, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Tetsuzou Ukai, Kazuhide Watanabe, Tomohisa Moro, Katsuhiro Fujita, Takayuki Kuwahara, Takamitsu Himeno
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Patent number: 8157553Abstract: In a scroll compressor, a center of a turning scroll body is shifted with respect to a drive central axis so that a distance between a gravity center and the drive central axis in a turning scroll becomes smaller than a predetermined allowable value set based on theoretical displacement and mass of the turning scroll. A moment force about the drive central axis acting on the turning scroll is reduced during revolving, and an alternating force acting on an autorotation preventing pin in the turning scroll is reduced to an allowable level.Type: GrantFiled: November 29, 2007Date of Patent: April 17, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Takahide Ito, Takamitsu Himeno, Tetsuzou Ukai, Kazuhide Watanabe, Katsuhiro Fujita, Tomohisa Moro
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Patent number: 8152501Abstract: In a scroll compressor configured to be capable of three-dimensional compression in a circumferential direction and a height direction of spiral wraps, in which top surfaces and bottom surfaces of spiral wraps (25B and 27B) are provided with step portions (25E and 27E) and the wrap height on the outer peripheral side of the step portion is made higher than the wrap height on the inner peripheral side, back-pressure introducing portions (55 and 57) where gaps between the back surfaces at step-portion ends of tip seals and groove bottom surfaces of tip seal grooves are made larger than a gap at the other portion are formed between the step-portion ends of tip seals (51 and 53) provided on top surfaces (25G and 27G) on the outer peripheral side of the spiral wraps and tip seal grooves (25L and 27L) to which the tip seals are fitted.Type: GrantFiled: September 18, 2008Date of Patent: April 10, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Tomohisa Moro, Hirohumi Hirata, Masahiro Ohta, Kazuhide Watanabe, Takayuki Kuwahara, Makoto Takeuchi, Tetuzou Ukai
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Publication number: 20110286871Abstract: A scroll compressor is provided that can reliably prevent a situation in which a product whose performance is degraded due to misassembly of a tip seal is shipped. In the scroll compressor, tip seals of different lengths are embedded in tip surfaces of a fixed spiral wrap of a fixed scroll and an orbiting spiral wrap of an orbiting scroll. Among the tip seals, thicknesses of the shorter tip seals are made thicker than thicknesses of the longer tip seals, and depths of seal grooves in which the tip seals are embedded, respectively, are formed to different depths in correspondence with the thicknesses of the respective tip seals.Type: ApplicationFiled: May 14, 2010Publication date: November 24, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tomohisa Moro, Norio Hioki, Koji Terasaki, Koryo Shibahara, Tetsuzo Ukai, Katsuhiro Fujita, Takayuki Kuwahara
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Publication number: 20110256010Abstract: A scroll compressor that suffers no decrease in compression performance due to leakage resulting from a twisting assembly error is provided. This scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll.Type: ApplicationFiled: June 28, 2011Publication date: October 20, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Patent number: 8038421Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll. The relationship between the involute surfaces of the spiral wraps of the two scrolls and the dimensions, dimensional tolerance, and assembly standards of the rotation-preventing mechanism are determined so that the median value of an allowable angle of rotation (?) agrees with an upright position of the orbiting scroll.Type: GrantFiled: February 4, 2008Date of Patent: October 18, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Publication number: 20110194966Abstract: A scroll compressor includes a housing; a fixed scroll fixed in the housing; an orbiting scroll that has an orbiting end plate on which a spiral orbiting wall is provided upright and that is supported in the housing so as to be able to orbit while being prevented from rotating, in a state where the orbiting wall is engaged with the fixed wall; a suction section that makes refrigerant containing lubricant flow into a suction chamber provided in the housing; and a plurality of supply flow paths that are provided on a sliding surface between the housing and the orbiting end plate and that are connected to the suction chamber.Type: ApplicationFiled: December 1, 2009Publication date: August 11, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Makoto Takeuchi, Hiroshi Yamazaki, Shinta Mishima, Tomohisa Moro
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Patent number: 7905716Abstract: A scroll compressor includes an orbiting scroll engaged with a front case by pins and rings or ring holes to prevent rotation of the orbiting scroll. The rings or the ring holes have such an inside diameter that an orbiting radius defined by the pins and the rings or the ring holes is larger than a theoretical orbiting radius defined by engagement between gear surfaces of a fixed scroll and the orbiting scroll. The pins, the rings, or the ring holes are shifted in such a direction as to relieve twisting of the orbiting scroll relative to the fixed scroll.Type: GrantFiled: February 16, 2007Date of Patent: March 15, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Takeuchi, Takahide Ito, Hiroshi Yamazaki, Tetsuzou Ukai, Kazuhide Watanabe, Katsuhiro Fujita, Tomohisa Moro, Takayuki Kuwahara
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Publication number: 20100172780Abstract: An object of the present invention is to provide a scroll compressor capable of three-dimensional compression, which can prevent performance deterioration and performance variation due to gas leakage occurring on an outer peripheral side of a step portion of a spiral wrap and can achieve performance stabilization and performance improvement.Type: ApplicationFiled: September 18, 2008Publication date: July 8, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsuhiro Fujita, Tomohisa Moro, Hirohumi Hirata, Masahiro Ohta, Kazuhide Watanabe, Takayuki Kuwahara, Makoto Takeuchi, Tetuzou Ukai
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Publication number: 20100068086Abstract: Provided is a scroll fluid machine that, by using a crankshaft manufactured by cold forging and a needle bearing, can sufficiently exhibit the performance of a variable circling radius mechanism, can provide a sufficient reliability on a bearing portion of the crankshaft, and can be manufactured inexpensively. For this purpose, in a crankshaft 60 used for a driving force transmission system, a reinforced shaft unit 63 and a circular column-like large diameter unit 61 are formed at an end of a rotating shaft 16, a material is produced by a cold forging process so that an eccentric shaft 62 projects from the circular column-like large diameter unit 61, the circular column-like large diameter unit 61 is rotatably coupled to a housing 11 via a needle bearing 64, and the variable circling radius mechanism is stably operated with rigidity increased by the reinforced shaft unit 63.Type: ApplicationFiled: November 29, 2007Publication date: March 18, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Tetsuzou Ukai, Kazuhide Watanabe, Tomohisa Moro, Katsuhiro Fujita, Takayuki Kuwahara, Takamitsu Himeno
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Patent number: 7658600Abstract: There is provided a scroll compressor in which reliability and durability is increased by preventing peeling of a coating layer applied to a thrust plate, to maintain a desired level of lubrication for a long period of time. The scroll compressor has a thrust plate, a coating which is applied to a surface of the thrust plate, a housing having a thrust bearing face to which the thrust plate is attached, an orbiting scroll member having a slide face which is supported by the thrust plate and which orbits while sliding, and a peeling prevention part which reduces a sliding pressure acting on an edge portion of the thrust plate from the slide face.Type: GrantFiled: November 13, 2006Date of Patent: February 9, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Kazuhide Watanabe, Takayuki Kuwahara, Tomohisa Moro, Makoto Takeuchi, Hiroshi Yamazaki, Tetsuzou Ukai
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Publication number: 20100021328Abstract: In a scroll compressor, a center of a turning scroll body is shifted with respect to a drive central axis so that a distance between a gravity center and the drive central axis in a turning scroll becomes smaller than a predetermined allowable value set based on theoretical displacement and mass of the turning scroll. A moment force about the drive central axis acting on the turning scroll is reduced during revolving, and an alternating force acting on an autorotation preventing pin in the turning scroll is reduced to an allowable level.Type: ApplicationFiled: November 29, 2007Publication date: January 28, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Yamazaki, Makoto Takeuchi, Takahide Ito, Takamitsu Himeno, Tetsuzou Ukai, Kazuhide Watanabe, Katsuhiro Fujita, Tomohisa Moro
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Publication number: 20100021329Abstract: A scroll compressor that suffers no decrease in compression performance due to leakage resulting from a twisting assembly error is provided. This scroll compressor includes a fixed scroll and an orbiting scroll, each including a spiral wrap protruding from an end plate and having the same tooth thickness (Tr) and the same base-circle radius (b) defining an involute surface. The fixed scroll and the orbiting scroll are offset from each other by an orbiting radius (?) and mesh such that the respective wraps face each other with a phase shift of 180°. The orbiting scroll revolves/orbits along a circular orbit with the orbiting radius (?) to compress a gas while a rotation-preventing mechanism prevents rotation of the orbiting scroll.Type: ApplicationFiled: February 4, 2008Publication date: January 28, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takayuki Kuwahara, Tetsuzou Ukai, Katsuhiro Fujita, Kazuhide Watanabe, Tomohisa Moro
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Patent number: 7604465Abstract: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a scroll compression mechanism is housed within a housing having a funnel shaped, a compression mechanism main body of the scroll compression mechanism is arranged in a wide opening section of a front housing, and a compression mechanism driving section is arranged in a narrow section, a concave section is formed on the outside of a thrust receiving surface which is positioned on a bottom surface of the wide opening section and which supports the compression mechanism.Type: GrantFiled: February 1, 2007Date of Patent: October 20, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsuhiro Fujita, Tomohisa Moro, Takayuki Kuwahara, Kazuhide Watanabe, Tetsuzou Ukai, Norio Hioki, Hiroshi Yamazaki, Makoto Takeuchi, Takamitsu Himeno
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Publication number: 20070292293Abstract: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a scroll compression mechanism 23 is housed within a housing 3 having a funnel shaped, a compression mechanism main body of the scroll compression mechanism 23 is arranged in a wide opening section of a front housing 5, and a compression mechanism driving section is arranged in a narrow section, a concave section 51 is formed on the outside of a thrust receiving surface 5B which is positioned on a bottom surface of the wide opening section and which supports the compression mechanism.Type: ApplicationFiled: February 1, 2007Publication date: December 20, 2007Inventors: Katsuhiro Fujita, Tomohisa Moro, Takayuki Kuwahara, Kazuhide Watanabe, Tetsuzou Ukai, Norio Hioki, Hiroshi Yamazaki, Makoto Takeuchi, Takamitsu Himeno