Patents by Inventor Tsutomu Nasuda
Tsutomu Nasuda 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: 8784087Abstract: A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle ? is over 360/n degrees.Type: GrantFiled: March 31, 2010Date of Patent: July 22, 2014Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Takayuki Hirano, Kazuho Yamada, Masato Sowa, Toshiro Fujii, Tsutomu Nasuda, Katsutoshi Shiromaru, Fumihiro Suzuki
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Publication number: 20100254846Abstract: A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle ? is over 360/n degrees.Type: ApplicationFiled: March 31, 2010Publication date: October 7, 2010Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Takayuki Hirano, Kazuho Yamada, Masato Sowa, Toshiro Fujii, Tsutomu Nasuda, Katsutoshi Shiromaru, Fumihiro Suzuki
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Patent number: 7544047Abstract: A compressor, which is cooled by cooling medium, includes a compression chamber, a first cooling chamber and a second cooling chamber. In the compression chamber, gas is compressed and then discharged therefrom. The first cooling chamber, in which the cooling medium flows, is provided so as to adjoin the compression chamber for cooling the gas in the compression chamber. The second cooling chamber adjoins the first cooling chamber. The second cooling chamber has a gas passage in which the discharged gas flows and a medium passage in which the cooling medium flows. The medium passage is arranged so as to restrain transmission of heat of the discharged gas in the gas passage to the cooling medium in the first cooling chamber.Type: GrantFiled: March 29, 2004Date of Patent: June 9, 2009Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Yoshiyuki Nakane, Hidefumi Mori, Tatsuyuki Hoshino, Kazuho Yamada, Tsutomu Nasuda
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Patent number: 7162797Abstract: A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.Type: GrantFiled: September 2, 2004Date of Patent: January 16, 2007Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Masato Sowa, Yoshiyuki Nakane, Toshiro Fujii, Tatsuyuki Hoshino, Ryuta Kawaguchi, Takahiro Moroi, Tsutomu Nasuda
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Publication number: 20050053482Abstract: A compressor includes a housing, a suction passage, a compression unit, a drive unit, a suction piping and a thermal insulating member. The housing forms a configuration of the compressor. The suction passage is formed in the housing for introducing a suction gas. The compression unit is provided in the housing for compressing the suction gas. The drive unit is provided in the housing for driving the compression unit. The suction piping is attached to the housing for connecting to the suction passage. The thermal insulating member is interposed between the housing and the suction piping for preventing heat transfer from the housing to the suction piping, and the thermal insulating member has a through hole which interconnects the suction passage and the suction piping.Type: ApplicationFiled: September 1, 2004Publication date: March 10, 2005Inventors: Yoshiyuki Nakane, Tsutomu Nasuda
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Patent number: 6860729Abstract: A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.Type: GrantFiled: July 9, 2002Date of Patent: March 1, 2005Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Masato Sowa, Yoshiyuki Nakane, Toshiro Fujii, Tatsuyuki Hoshino, Ryuta Kawaguchi, Takahiro Moroi, Tsutomu Nasuda
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Publication number: 20050025651Abstract: A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.Type: ApplicationFiled: September 2, 2004Publication date: February 3, 2005Inventors: Masato Sowa, Yoshiyuki Nakane, Toshiru Fujii, Tatsuyuki Hoshino, Ryuta Kawaguchi, Takahiro Moroi, Tsutomu Nasuda
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Publication number: 20040191100Abstract: A compressor, which is cooled by cooling medium, includes a compression chamber, a first cooling chamber and a second cooling chamber. In the compression chamber, gas is compressed and then discharged therefrom. The first cooling chamber, in which the cooling medium flows, is provided so as to adjoin the compression chamber for cooling the gas in the compression chamber. The second cooling chamber adjoins the first cooling chamber. The second cooling chamber has a gas passage in which the discharged gas flows and a medium passage in which the cooling medium flows. The medium passage is arranged so as to restrain transmission of heat of the discharged gas in the gas passage to the cooling medium in the first cooling chamber.Type: ApplicationFiled: March 29, 2004Publication date: September 30, 2004Inventors: Yoshiyuki Nakane, Hidefumi Mori, Tatsuyuki Hoshino, Kazuho Yamada, Tsutomu Nasuda
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Patent number: 6776592Abstract: In a region where heat deformation of a movable scroll spiral wall and/or a fixed scroll spiral wall for a scroll type compressor is relatively large, a relieving part is formed for relieving the heat deformation of the movable scroll spiral wall and/or the fixed scroll spiral wall in at least a part of at least one of an outer circumferential wall of the movable scroll spiral wall and an inner circumferential wall of the fixed scroll spiral wall, which corresponds to the outer circumferential wall of the movable scroll spiral wall.Type: GrantFiled: July 30, 2003Date of Patent: August 17, 2004Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Yoshiyuki Nakane, Kazuho Sato, Tsutomu Nasuda, Hisao Hamasaki
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Publication number: 20040067147Abstract: In a region where heat deformation of a movable scroll spiral wall and/or a fixed scroll spiral wall for a scroll type compressor is relatively large, a relieving part is formed for relieving the heat deformation of the movable scroll spiral wall and/or the fixed scroll spiral wall in at least a part of at least one of an outer circumferential wall of the movable scroll spiral wall and an inner circumferential wall of the fixed scroll spiral wall, which corresponds to the outer circumferential wall of the movable scroll spiral wall.Type: ApplicationFiled: July 30, 2003Publication date: April 8, 2004Inventors: Yoshiyuki Nakane, Kazuho Sato, Tsutomu Nasuda, Hisao Hamasaki
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Patent number: 6692205Abstract: A compressor has a compression unit, a drive motor, a motor housing and an outer cylinder. The compression unit compresses fluid. The drive motor drives the compression unit. The motor housing surrounds the drive motor. The outer cylinder is mounted on an outer circumferential side of the motor housing for defining a cooling jacket between the outer cylinder and the motor housing for cooling the drive motor by a fluid flowing in the cooling jacket. The outer cylinder is indirectly fixed to the motor housing by press-fitting.Type: GrantFiled: July 18, 2002Date of Patent: February 17, 2004Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Takahiro Moroi, Yoshiyuki Nakane, Ryuta Kawaguchi, Tsutomu Nasuda
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Patent number: 6663364Abstract: A scroll type compressor includes a housing, a fixed scroll member, a movable scroll member, a discharge port, a cooling chamber and a gas cooler. The fixed scroll member is fixed to the housing. The movable scroll member is accommodated in the housing and defining a compression region with the fixed scroll member where gas is compressed by orbiting the movable scroll member relative to the fixed scroll member. The compressed gas is discharged from the compression region through the discharge port. The cooling chamber for cooling the compressed gas is disposed in the vicinity of the compression region in the housing. The gas cooler for passing the gas discharged from the discharge port extends along the cooling chamber.Type: GrantFiled: January 25, 2002Date of Patent: December 16, 2003Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Masahiko Okada, Takahiro Moroi, Yoshiyuki Nakane, Tsutomu Nasuda, Ryuta Kawaguchi
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Patent number: 6644946Abstract: A scroll type compressor has a housing, a drive shaft, a fixed scroll member, a movable scroll member, a suction port and a discharge port. The drive shaft is rotatably supported by the housing. The fixed scroll member is fixed to the housing. The movable scroll member is accommodated in the housing, and the faces the fixed scroll member. The housing and the fixed scroll member define a cooling region. The fixed scroll member and the movable scroll member define a compression region. The suction port introduces gas into the compressor. The discharge port discharges the gas. Heat resistant means is disposed at least between the cooling region and the compression region. Heat resistance of the heat resistant means adjacent to the outermost compression region is greater than that of the heat resistant means adjacent to the innermost compression region.Type: GrantFiled: January 22, 2002Date of Patent: November 11, 2003Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Yoshiyuki Nakane, Takahiro Moroi, Ryuta Kawaguchi, Tsutomu Nasuda
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Publication number: 20030017070Abstract: A compressor has a compression unit, a drive motor, a motor housing and an outer cylinder. The compression unit compresses fluid. The drive motor drives the compression unit. The motor housing surrounds the drive motor. The outer cylinder is mounted on an outer circumferential side of the motor housing for defining a cooling jacket between the outer cylinder and the motor housing for cooling the drive motor by a refrigerant flowing in the cooling jacket. The outer cylinder is directly or indirectly fixed to the motor housing by fastening a plurality of bolts or by press-fitting.Type: ApplicationFiled: July 18, 2002Publication date: January 23, 2003Inventors: Takahiro Moroi, Yoshiyuki Nakane, Ryuta Kawaguchi, Tsutomu Nasuda
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Publication number: 20030012672Abstract: A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.Type: ApplicationFiled: July 9, 2002Publication date: January 16, 2003Inventors: Masato Sowa, Yoshiyuki Nakane, Toshiro Fujii, Tatsuyuki Hoshino, Ryuta Kawaguchi, Takahiro Moroi, Tsutomu Nasuda
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Patent number: 6503069Abstract: The scroll-type compressor with an integrated motor of the present invention comprises a housing 1, a fixed scroll 21 fixed to the housing 1, a movable scroll 31 installed eccentrically to the fixed scroll 21, and a motor portion 5, and is characterized in that the housing 1 comprises a high pressure chamber 25 to which compressed gases are supplied, a first cooling chamber 26′ installed contiguous to the high pressure chamber 25 and to which cooling fluid is supplied, a second cooling chamber 42 which cools the motor portion 5 and is supplied with the cooling fluid, and a fluid passage 7 that connects the first cooling chamber 26′ and the second cooling chamber 42 and passes the cooling fluid in the direction from the first cooling chamber 26′ to the second cooling chamber 42.Type: GrantFiled: September 26, 2001Date of Patent: January 7, 2003Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Takahiro Moroi, Ryuta Kawaguchi, Tsutomu Nasuda, Koji Kawamura, Masato Sowa, Tatsuyuki Hoshino, Yoshiyuki Nakane, Hidehito Kubo, Hirohisa Katoh, Daisuke Satoh
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Publication number: 20020110470Abstract: A scroll type compressor has a housing, a drive shaft, a fixed scroll member, a movable scroll member, a suction port and a discharge port. The drive shaft is rotatably supported by the housing. The fixed scroll member is fixed to the housing. The movable scroll member is accommodated in the housing, and the faces the fixed scroll member. The housing and the fixed scroll member define a cooling region. The fixed scroll member and the movable scroll member define a compression region. The suction port introduces gas into the compressor. The discharge port discharges the gas. Heat resistant means is disposed at least between the cooling region and the compression region. Heat resistance of the heat resistant means adjacent to the outermost compression region is greater than that of the heat resistant means adjacent to the innermost compression region.Type: ApplicationFiled: January 22, 2002Publication date: August 15, 2002Inventors: Yoshiyuki Nakane, Takahiro Moroi, Ryuta Kawaguchi, Tsutomu Nasuda
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Publication number: 20020102173Abstract: A scroll type compressor includes a housing, a fixed scroll member, a movable scroll member, a discharge port, a cooling chamber and a gas cooler. The fixed scroll member is fixed to the housing. The movable scroll member is accommodated in the housing and defining a compression region with the fixed scroll member where gas is compressed by orbiting the movable scroll member relative to the fixed scroll member. The compressed gas is discharged from the compression region through the discharge port. The cooling chamber for cooling the compressed gas is disposed in the vicinity of the compression region in the housing. The gas cooler for passing the gas discharged from the discharge port extends along the cooling chamber.Type: ApplicationFiled: January 25, 2002Publication date: August 1, 2002Inventors: Masahiko Okada, Takahiro Moroi, Yoshiyuki Nakane, Tsutomu Nasuda, Ryuta Kawaguchi
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Publication number: 20020094289Abstract: A scroll-type compressor 1 of the present invention comprises a fixed scroll 30, a movable scroll 51 which orbits so that it slides along the fixed scroll 30, draws, and compresses gas, and a housing 3 which includes a discharge port 6 from which the gas compressed by the movable scroll 51 is discharged; wherein a cooling fin 35, which directly contacts at least a part of the compressed gas, receives heat from the compressed gas, and reduces the temperature of the compressed gas, is included inside the discharge port 6. In the scroll-type compressor in the present invention the cooling fin is provided in the discharge port. When the cooling fin is provided in the discharge port, and not around the discharge port, the discharge gas of high temperature directly contacts the cooling fin, so that the cooling efficiency of the compressor is improved.Type: ApplicationFiled: December 18, 2001Publication date: July 18, 2002Applicant: Kabushiki Kaisha Toyota JidoshokkiInventors: Yoshiyuki Nakane, Tatsuyuki Hoshino, Ryuta Kawaguchi, Tsutomu Nasuda, Takahiro Moroi
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Publication number: 20020071779Abstract: The scroll-type compressor with an integrated motor of the present invention comprises a housing 1, a fixed scroll 21 fixed to the housing 1, a movable scroll 31 installed eccentrically to the fixed scroll 21, and a motor portion 5, and is characterized in that the housing 1 comprises a high pressure chamber 25 to which compressed gases are supplied, a first cooling chamber 26′ installed contiguous to the high pressure chamber 25 and to which cooling fluid is supplied, a second cooling chamber 42 which cools the motor portion 5 and is supplied with the cooling fluid, and a fluid passage 7 that connects the first cooling chamber 26′ and the second cooling chamber 42 and passes the cooling fluid in the direction from the first cooling chamber 26′ to the second cooling chamber 42.Type: ApplicationFiled: September 26, 2001Publication date: June 13, 2002Inventors: Takahiro Moroi, Ryuta Kawaguchi, Tsutomu Nasuda, Koji Kawamura, Masato Sowa, Tatsuyuki Hoshino, Yoshiyuki Nakane, Hidehito Kubo, Hirohisa Katoh, Daisuke Satoh