Patents by Inventor Minoru Kawada
Minoru Kawada 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: 8829747Abstract: Provided is an electric compressor for car air conditioning that allows insulation and airtightness to be ensured at a terminal part thereof.Type: GrantFiled: October 10, 2008Date of Patent: September 9, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Watanabe, Takayuki Hagita, Masayuki Ishikawa, Minoru Kawada
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Patent number: 8796889Abstract: Disclosed is an in-vehicle integrated-inverter electric compressor (1) in which an inverter accommodating section (3) is provided on the periphery of a housing (2), an inverter device is installed in the inverter accommodating section (3), and the opening portion of the inverter accommodating section (3) is sealed by means of a cover member (4) to be fixed with screws. A safety mechanism (7) is provided such that some of the fixing screws (5) fixing the cover member (4) to the inverter accommodating section (3) cannot be removed when the electric compressor (1) is mounted in a vehicle.Type: GrantFiled: November 13, 2009Date of Patent: August 5, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Noriaki Arashi, Manabu Suzuki, Takeshi Hirano, Minoru Kawada, Takayuki Watanabe, Ichiro Yogo
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Publication number: 20110133575Abstract: Disclosed is an in-vehicle integrated-inverter electric compressor (1) in which an inverter accommodating section (3) is provided on the periphery of a housing (2), an inverter device is installed in the inverter accommodating section (3), and the opening portion of the inverter accommodating section (3) is sealed by means of a cover member (4) to be fixed with screws. A safety mechanism (7) is provided such that some of the fixing screws (5) fixing the cover member (4) to the inverter accommodating section (3) cannot be removed when the electric compressor (1) is mounted in a vehicle.Type: ApplicationFiled: November 13, 2009Publication date: June 9, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Noriaki Arashi, Manabu Suzuki, Takeshi Hirano, Minoru Kawada, Takayuki Watanabe, Ichiro Yogo
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Publication number: 20110062809Abstract: Provided is an electric compressor for car air conditioning that allows insulation and airtightness to be ensured at a terminal part thereof.Type: ApplicationFiled: October 10, 2008Publication date: March 17, 2011Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Watanabe, Takayuki Hagita, Masayuki Ishikawa, Minoru Kawada
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Publication number: 20100028175Abstract: An electric compressor for a vehicle air conditioner capable of preventing refrigerant leakage is provided. A case (77) is formed by injecting a molten metal into a mold, and a compression unit for compressing a refrigerant is accommodated inside, wherein a machined portion (123) is formed on one of an inner circumferential surface (77A) in contact with the refrigerant and an outer circumferential surface adjacent to the inner circumferential surface.Type: ApplicationFiled: October 2, 2008Publication date: February 4, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yuki Ichise, Takayuki Watanabe, Takeshi Hirano, Masaki Kawasaki, Takayuki Hagita, Masayuki Ishikawa, Minoru Kawada
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Patent number: 7473080Abstract: A compressor having an internally mounted inverter and having improved safety at low cost is provided. The compressor has a motor; a compressor mechanism driven by the motor; a first housing section having an opening and within which the motor is housed; a second housing section which is mounted on the first housing section and which closes the opening; a fixing member which fixes the second housing section to the first housing section; a controller which is provided on the first housing section and which controls the operation of the motor; a power supply section which supplies power to the controller; a protective cover which covers the controller; and a power source control apparatus which stops the supply of power to the controller by the power supply section or carries out a prescribed safety measure operation when the protective cover is removed from the controller.Type: GrantFiled: February 7, 2006Date of Patent: January 6, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Minoru Kawada, Takayuki Hagita, Makoto Hattori, Masahiko Asai, Hirofumi Hirata
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Publication number: 20060230781Abstract: A compressor having an internally mounted inverter and having improved safety at low cost is provided. The compressor has a motor; a compressor mechanism driven by the motor; a first housing section having an opening and within which the motor is housed; a second housing section which is mounted on the first housing section and which closes the opening; a fixing member which fixes the second housing section to the first housing section; a controller which is provided on the first housing section and which controls the operation of the motor; a power supply section which supplies power to the controller; a protective cover which covers the controller; and a power source control apparatus which stops the supply of power to the controller by the power supply section or carries out a prescribed safety measure operation when the protective cover is removed from the controller.Type: ApplicationFiled: February 7, 2006Publication date: October 19, 2006Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Minoru Kawada, Takayuki Hagita, Makoto Hattori, Masahiko Asai, Hirofumi Hirata
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Patent number: 6578689Abstract: The invention provides an electromagnetic clutch that effectively reduces the shock noise produced during the coupling of an armature plate and a drive rotor, and furthermore, has a laminated body that can be provided at a low cost as an essential constituent element. The armature plate 34 of the electromagnetic clutch is a laminated body that comprises a plurality of thin metal plates 41, a plurality of fastening tongues 45 project from the inner diameter side of the friction plate 42 on the friction surface side, and these fastening tongues 45 are bent and surround the other laminated thin metal plates 41 so as to fasten them.Type: GrantFiled: August 30, 2001Date of Patent: June 17, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Minoru Kawada, Makoto Hattori, Yoshikatsu Azuma, Hirohide Andoh
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Patent number: 6568520Abstract: The present invention aims to provide an electromagnetic clutch capable of decreasing the impact noise generated when the armature plate and the driving rotor are coupled. The present invention further aims to provide a compressor equipped with this electromagnetic clutch. An electromagnetic clutch in the present invention comprises a driving rotor including a coil, and an armature having an armature plate that is disposed facing this driving rotor and having the same axis of rotational thereas, and when a voltage is applied to excite coil, the end face of driving rotor and the armature plate are attached together by coil's magnetic force, thereby coupling driving rotor and armature. Armature plate comprises a plurality of metal thin plates (plate members) laminated together, and at least a part of the plate members being connected each other.Type: GrantFiled: June 15, 2001Date of Patent: May 27, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Hattori, Ryuhei Tanigaki, Minoru Kawada, Kazuhiro Tomimasu, Masumi Sekita, Hirohide Ando
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Patent number: 6505725Abstract: The present invention relates to an electromagnetic clutch device for a compressor used for air conditioners in vehicles and so forth. The object of the present invention is to provide an electromagnetic clutch device whose pulley can be downsized regardless of the outer diameter of a coil even when the so-called alignment is small. In order to achieve this object, an electromagnetic clutch device according to the present invention comprises a drive shaft forming a part of a compressor mechanism which is accommodated in a housing of the compressor and projecting through a nose of the housing; a drive rotor accommodating a coil for the electromagnetic clutch and rotatably supported on the circumference of the nose by means of a clutch bearing; an armature plate opposing the coil and connected to a projecting end of the drive shaft so as to rotate with the drive shaft; and a pulley fixedly attached to the drive rotor, wherein the pulley is arranged between the housing and the coil.Type: GrantFiled: November 29, 2000Date of Patent: January 14, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Ryuhei Tanigaki, Shin Watabe, Minoru Kawada
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Patent number: 6409004Abstract: An electromagnetic clutch comprises a clutch rotor having a flange portion, an armature opposed to the flange portion, and a ring exciting coil. The ring exciting coil generates a magnetic flux for attracting the armature to the flange portion when it is supplied with current. The flange portion is formed having outside slits and inside slits. A magnetic pole portion on the outer peripheral side and a magnetic pole portion on the inner peripheral side are formed between the outside slits and the inside slits. A step portion and a concave surface continuous with the step portion are formed in a region corresponding to the magnetic pole portion on the outer peripheral side. The step portion serves to restrain the magnetic pole portion from touching the armature when the magnetic flux is formed.Type: GrantFiled: August 9, 2000Date of Patent: June 25, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Minoru Kawada, Ryuhei Tanigaki
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Publication number: 20020029949Abstract: The invention provides an electromagnetic clutch that effectively reduces the shock noise produced during the coupling of an armature plate and a drive rotor, and furthermore, has a laminated body that can be provided at a low cost as an essential constituent element. The armature plate 34 of the electromagnetic clutch is a laminated body that comprises a plurality of thin metal plates 41, a plurality of fastening tongues 45 project from the inner diameter side of the friction plate 42 on the friction surface side, and these fastening tongues 45 are bent and surround the other laminated thin metal plates 41 so as to fasten them.Type: ApplicationFiled: August 30, 2001Publication date: March 14, 2002Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Minoru Kawada, Makoto Hattori, Yoshikatsu Azuma, Hirohide Andoh
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Publication number: 20020000355Abstract: The present invention aims to provide an electromagnetic clutch capable of decreasing the impact noise generated when the armature plate and the driving rotor are coupled. The present invention further aims to provide a compressor equipped with this electromagnetic clutch.Type: ApplicationFiled: June 15, 2001Publication date: January 3, 2002Applicant: MITSUBISHI HEAVY INDUSTRIES LTD.Inventors: Makoto Hattori, Ryuhei Tanigaki, Minoru Kawada, Kazuhiro Tomimasu, Masumi Sekita, Hirohide Ando
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Patent number: 6334763Abstract: A capacity-controlled scroll-type compressor having an internally-bypassing system is provided, by which it is possible to prevent the tip gaps near the gas-suction inlet or the main stream of bypassing gas from becoming smaller than those of other portions. Regarding tip gaps near the gas-suction inlet, the length of teeth of a portion of the scrolls, which is closer to the gas-suction inlet, is shorter than teeth of other portions of the scrolls. Regarding tip gaps near the main stream of a bypassing gas, (i) the length of teeth of a portion of the scrolls, which is close to the main stream of a bypassing gas, is shorter than teeth of other portions, or (ii) a gas-suction inlet is positioned near the main stream of bypassing gas so as to suppress increase in the temperature of an area neighboring the main stream.Type: GrantFiled: June 13, 2001Date of Patent: January 1, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Tsuneo Yuzaki, Minoru Kawada
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Publication number: 20010028852Abstract: A capacity-controlled scroll-type compressor having an internally-bypassing system is provided, by which when the capacity is controlled, it is possible to prevent the tip gaps near the gas-suction inlet or the main stream of a bypassing gas from becoming smaller than those of other portions. Regarding the tip gaps near the gas-suction inlet, the length of teeth of a portion of the scrolls, which is closer to the gas-suction inlet, is shorter than teeth of other portions of the scrolls. Regarding the tip gaps near the main stream of a bypassing gas, (i) the length of teeth of a portion of the scrolls, which is close to the main stream of a bypassing gas, is shorter than teeth of other portions, or (ii) a gas-suction inlet is positioned near the main stream of a bypassing gas so as to suppress increase in the temperature of an area neighboring the main stream of the bypassing gas.Type: ApplicationFiled: June 13, 2001Publication date: October 11, 2001Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tsuneo Yuzaki, Minoru Kawada
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Publication number: 20010004037Abstract: The present invention relates to an electromagnetic clutch device for a compressor used for air conditioners in vehicles and so forth. The object of the present invention is to provide an electromagnetic clutch device whose pulley can be downsized regardless of the outer diameter of a coil even when the so-called alignment is small. In order to achieve this object, an electromagnetic clutch device according to the present invention comprises a drive shaft forming a part of a compressor mechanism which is accommodated in a housing of the compressor and projecting through a nose of the housing; a drive rotor accommodating a coil for the electromagnetic clutch and rotatably supported on the circumference of the nose by means of a clutch bearing; an armature plate opposing the coil and connected to a projecting end of the drive shaft so as to rotate with the drive shaft; and a pulley fixedly attached to the drive rotor, wherein the pulley is arranged between the housing and the coil.Type: ApplicationFiled: November 29, 2000Publication date: June 21, 2001Inventors: Ryuhei Tanigaki, Shin Watabe, Minoru Kawada
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Patent number: 6168402Abstract: The invention relates to a scroll-type compressor which will not exert an undesirable influence on a power source of a rotation shaft, even if seizing occurs between an orbiting scroll member and a fixed scroll member. A power transmission mechanism P is provided between a rotation shaft 7 and an eccentric drive pin 25 for transmitting power to an orbiting scroll member 14. An inner wall of a bore of a closed ended cylindrical member 40 with an eccentric drive pin 25 protruding from a base end thereof is formed in the height direction of the cylinder with a plurality of grooves 44 of semi-circular cross-section. Moreover, a cylindrical resilient roller 43 is centrally provided on the closed end with a height approximately the same as that of the closed ended cylindrical member 40. Rollers 42 are provided so as to be inscribed in each groove 44 and so as to come into contact with an outer peripheral surface of the resilient roller 43.Type: GrantFiled: April 21, 1999Date of Patent: January 2, 2001Assignee: Mitsubishi Heavy Industries, Ltd.Inventor: Minoru Kawada
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Patent number: 6123527Abstract: A scroll hydraulic machine has a fixed scroll and a swirling scroll performing a revolutionary swirling motion while engaging with the fixed scroll; there is also a balance weight in which a distance between a center of revolution of the swirling scroll and the center of gravity of the balance weight is changed in response to rotational speed of the swirling scroll.Type: GrantFiled: January 20, 1998Date of Patent: September 26, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Minoru Kawada, Shigeki Miura
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Patent number: 6077045Abstract: A scroll-type compressor which prevents seizure or scuffing due to tight contact between spiral laps and end plates of fixed and revolving scrolls is provided. The compressor comprises two thermocouples, the contact point of one thermocouple being with a central portion of the end plate of the fixed scroll, while the contact point of the other thermocouple being with the housing. The operation of the scroll-type compressor is terminated when a difference between temperature values detected by the thermocouples reaches a predetermined value.Type: GrantFiled: December 4, 1998Date of Patent: June 20, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventor: Minoru Kawada
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Patent number: 6074187Abstract: In a compressor in which a compression mechanism incorporated in a housing is driven by a drive shaft penetrating the housing, and the compression mechanism is lubricated by mist-form lubricating oil contained in a low-pressure gas refrigerant sucked into the housing, the lubricating oil in a space is prevented from entering a bearing and deteriorating grease in the bearing. An equalizing hole is formed to allow the space to communicate with the atmosphere, the space being defined between the bearing pivotally supporting the outer end of the drive shaft on the housing and a shaft seal disposed on the inside of the bearing to seal a gap between the drive shaft and the housing.Type: GrantFiled: November 19, 1998Date of Patent: June 13, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Minoru Kawada, Mikihiko Ishii