Patents by Inventor Ken Namiki
Ken Namiki 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: 12209583Abstract: A scroll compressor includes a housing, a first scroll, a second scroll being configured to rotate relative to the first scroll about a driving axis of the scroll compressor. The second scroll has an end plate, a spiral element, and an adjustment portion adjusting a center-of-gravity of the second scroll. The adjustment portion has a bottom surface, a peripheral surface enclosing the bottom surface, and a connection surface connecting the bottom surface to the peripheral surface. The peripheral surface has a first peripheral surface and a second peripheral surface. A length of the first peripheral surface in a direction in which the driving axis extends is shorter than a length of the second peripheral surface in the direction in which the driving axis extends.Type: GrantFiled: June 26, 2023Date of Patent: January 28, 2025Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Ken Namiki, Takuro Yamashita, Shiori Yamamoto
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Patent number: 12110891Abstract: A fixed outer circumferential wall of a fixed scroll, a movable scroll, and a plate define a suction pressure space configured such that fluid flows from a suction chamber into the suction pressure space. The movable scroll and an opposed wall define a first back-pressure space. The plate and a back-pressure-chamber-defining recess of the opposed wall define a second back-pressure space. A back-pressure supplying groove of the opposed wall is configured to connect the first back-pressure space to the second back-pressure space, thereby supplying the fluid from the first back-pressure space to the second back-pressure space. A discharge hole of the plate is configured to connect the second back-pressure space to the suction pressure space, thereby discharging the fluid from the second back-pressure space to the suction pressure space. At least part of the discharge hole is overlapped with the back-pressure supplying groove in an axial direction.Type: GrantFiled: February 15, 2024Date of Patent: October 8, 2024Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kenji Kakimoto, Ken Namiki, Shiori Yamamoto, Kunihisa Matsuda, Yuya Hattori, Takuro Yamashita
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Publication number: 20240295219Abstract: A fixed outer circumferential wall of a fixed scroll, a movable scroll, and a plate define a suction pressure space configured such that fluid flows from a suction chamber into the suction pressure space. The movable scroll and an opposed wall define a first back-pressure space. The plate and a back-pressure-chamber-defining recess of the opposed wall define a second back-pressure space. A back-pressure supplying groove of the opposed wall is configured to connect the first back-pressure space to the second back-pressure space, thereby supplying the fluid from the first back-pressure space to the second back-pressure space. A discharge hole of the plate is configured to connect the second back-pressure space to the suction pressure space, thereby discharging the fluid from the second back-pressure space to the suction pressure space. At least part of the discharge hole is overlapped with the back-pressure supplying groove in an axial direction.Type: ApplicationFiled: February 15, 2024Publication date: September 5, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kenji Kakimoto, Ken Namiki, Shiori Yamamoto, Kunihisa Matsuda, Yuya Hattori, Takuro Yamashita
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Publication number: 20240229793Abstract: A scroll compressor includes a compression chamber that compresses a fluid, an outer peripheral passage into which the fluid flows from a motor chamber, and a suction passage draws in the fluid from the outer peripheral passage to the compression chamber. The compression chamber is defined by a fixed scroll and an orbiting scroll. The outer peripheral passage is defined by a third peripheral wall of a discharge housing member and a fixed peripheral wall of the fixed scroll. The suction passage is provided in the fixed peripheral wall and includes an upstream-side outer peripheral surface located between the suction passage and an electric motor in an axial direction of a rotary shaft. A distance from an axis of the rotary shaft to the upstream-side outer peripheral surface varies in the axial direction of the rotary shaft.Type: ApplicationFiled: October 12, 2023Publication date: July 11, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Shiori YAMAMOTO, Takuro YAMASHITA, Ken NAMIKI
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Patent number: 11988206Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll. A base plate of at least one of the fixed scroll and the orbiting scroll includes an auxiliary discharge port and a groove. The groove is partially covered with an orbiting volute wall facing the groove, so that a compression chamber that is in a compression process and is connected to the auxiliary discharge port is not connected to other compression chambers in a compression process or to a compression chamber connected to a main discharge port. The groove is always connected to one of the compression chambers.Type: GrantFiled: February 24, 2023Date of Patent: May 21, 2024Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventor: Ken Namiki
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Publication number: 20240133379Abstract: A scroll compressor includes a compression chamber that compresses a fluid, an outer peripheral passage into which the fluid flows from a motor chamber, and a suction passage draws in the fluid from the outer peripheral passage to the compression chamber. The compression chamber is defined by a fixed scroll and an orbiting scroll. The outer peripheral passage is defined by a third peripheral wall of a discharge housing member and a fixed peripheral wall of the fixed scroll. The suction passage is provided in the fixed peripheral wall and includes an upstream-side outer peripheral surface located between the suction passage and an electric motor in an axial direction of a rotary shaft. A distance from an axis of the rotary shaft to the upstream-side outer peripheral surface varies in the axial direction of the rotary shaft.Type: ApplicationFiled: October 11, 2023Publication date: April 25, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Shiori YAMAMOTO, Takuro YAMASHITA, Ken NAMIKI
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Publication number: 20240068470Abstract: An electric compressor includes: a compression part; an electric motor; an inverter; a housing including a plurality of housing forming members made of metal; a seal member that has an insulation property and is provided between the housing forming members adjacent to each other; and a potential equalization member that is made of metal and is in contact with both the adjacent housing forming members to equalize potentials of the adjacent housing forming members. The adjacent housing forming members include mating surfaces, respectively. An insertion hole is formed in one of the mating surfaces of the adjacent housing forming members, at a position in which the seal member is not provided. The potential equalization member includes an insertion portion inserted into the insertion hole, and a contact portion that is a plate portion extending in a gap between the mating surfaces and is in contact with both the mating surfaces.Type: ApplicationFiled: July 25, 2023Publication date: February 29, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Ken NAMIKI, Takuro Yamashita, Takumi Maeda, Akinori Tanabe, Takafumi Konishi, Takahiro Suzuki, Yoshitaka Saito
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Publication number: 20230417245Abstract: A scroll compressor includes a housing, a first scroll, a second scroll being configured to rotate relative to the first scroll about a driving axis of the scroll compressor. The second scroll has an end plate, a spiral element, and an adjustment portion adjusting a center-of-gravity of the second scroll. The adjustment portion has a bottom surface, a peripheral surface enclosing the bottom surface, and a connection surface connecting the bottom surface to the peripheral surface. The peripheral surface has a first peripheral surface and a second peripheral surface. A length of the first peripheral surface in a direction in which the driving axis extends is shorter than a length of the second peripheral surface in the direction in which the driving axis extends.Type: ApplicationFiled: June 26, 2023Publication date: December 28, 2023Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Ken NAMIKI, Takuro Yamashita, Shiori Yamamoto
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Publication number: 20230296092Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll. A base plate of at least one of the fixed scroll and the orbiting scroll includes an auxiliary discharge port and a groove. The groove is partially covered with an orbiting volute wall facing the groove, so that a compression chamber that is in a compression process and is connected to the auxiliary discharge port is not connected to other compression chambers in a compression process or to a compression chamber connected to a main discharge port. The groove is always connected to one of the compression chambers.Type: ApplicationFiled: February 24, 2023Publication date: September 21, 2023Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventor: Ken NAMIKI
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Publication number: 20210164471Abstract: A compressor includes a rotary shaft, a front rotor including a front rotor surface, an intermediate wall portion including a first wall surface opposed to the front rotor surface in an axial direction, and a vane that is inserted into a vane groove formed in the intermediate wall portion and is moved in the axial direction with rotation of the front rotor. The vane includes a first vane end that is an end in the axial direction and contacts the front rotor surface. The first vane end is curved so as to be convex toward the front rotor surface and extends in the direction perpendicular to the axial direction. The front rotor surface includes a front curving surface curved in the axial direction so as to be displaced in the axial direction in accordance with its angular position.Type: ApplicationFiled: February 7, 2019Publication date: June 3, 2021Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Shinya YAMAMOTO, Kazunari HONDA, Kengo SAKAKIBARA, Hiroyuki KOBAYASHI, Ken NAMIKI
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Publication number: 20200248690Abstract: A compressor includes a rotary shaft, a rotating body, which rotates together with the rotary shaft, and a fixed body, which does not rotate together with the rotary shaft. The rotating body has a rotating body surface, and the fixed body has a fixed body surface facing the rotating body surface in the axial direction. The compressor includes a vane, which is inserted in a vane groove provided in the rotating body, and a compression chamber, which is defined by the rotating body surface and the fixed body surface. The vane includes a vane body, which is inserted in the vane groove, and a tip seal, which is movable in the axial direction relative to the vane body.Type: ApplicationFiled: February 3, 2020Publication date: August 6, 2020Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Shinya Yamamoto, Kazunari Honda, Kengo Sakakibara, Hiroyuki Kobayashi, Ken Namiki
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Publication number: 20200248689Abstract: A compressor includes a rotary shaft, a rotating body, a fixed body, a vane, and a compression chamber. The vane has a vane end that contacts the surface of fixed body. The fixed body surface includes two curved surfaces. The curved surface includes a convex surface and a concave surface. The convex surface has a convex surface inner end and a convex surface outer end. The curvature of the convex surface inner end is greater than the curvature of the convex surface outer end. The concave surface has a concave surface inner end and a concave surface outer end. The curvature of the concave surface inner end is greater than the curvature of the concave surface outer end.Type: ApplicationFiled: February 3, 2020Publication date: August 6, 2020Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Jun KONDO, Shinya YAMAMOTO, Kazunari HONDA, Kengo SAKAKIBARA, Hiroyuki KOBAYASHI, Ken NAMIKI
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Publication number: 20190301450Abstract: A compressor includes a rotary shaft, a housing in which a suction port through which a suction fluid is drawn in and a discharge port through which a compression fluid is discharged are formed, and that houses the rotary shaft, and compression chambers. The suction fluid is drawn into the compression chambers. Respective volumes of the compression chambers are periodically changed with rotation of the rotary shaft. The phases of volume changes of the compression chambers are mutually shifted. The compressor includes a communication mechanism switched between a communicating state in which the compression chambers communicate with each other, and a non-communicating state in which the compression chambers do not communicate with each other.Type: ApplicationFiled: January 24, 2019Publication date: October 3, 2019Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Shinya YAMAMOTO, Kazunari HONDA, Ken NAMIKI, Kengo SAKAKIBARA, Hiroyuki KOBAYASHI
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Publication number: 20190301449Abstract: A compressor includes two rotors opposed to each other in an axial direction, and a vane contacting the rotors. While the vane is moved in the axial direction with rotation of the rotors, the vane is restricted from rotating by a vane groove. The compressor includes compression chambers in which suction and compression of fluid are performed with rotation of the rotors, and a communication mechanism switched between a communicating state in which the compression chambers communicate with each other, and a non-communicating state in which the compression chambers do not communicate with each other.Type: ApplicationFiled: January 24, 2019Publication date: October 3, 2019Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazunari HONDA, Shinya YAMAMOTO, Kengo SAKAKIBARA, Ken NAMIKI, Hiroyuki KOBAYASHI
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Publication number: 20150152864Abstract: A scroll compressor includes a hermetic container in which a refrigeration machine oil is stored in a bottom area, a compression mechanism that compresses a refrigerant which is suctioned into the hermetic container, an electric motor which has a motor rotor and a motor stator and is configured to drive the compression mechanism which is connected thereto via a shaft, a sub-frame that is fixed to the hermetic container and supports the shaft in a rotatable manner from a lower side of the electric motor, a balance weight that is disposed on a lower end face of the motor rotor, and a fixed cup that is disposed on an upper end of the sub-frame and surrounds the balance weight.Type: ApplicationFiled: October 29, 2014Publication date: June 4, 2015Inventors: Fumikazu NAGAOKA, Masashi MYOGAHARA, Rei MISAKA, Ken NAMIKI
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Patent number: 8228329Abstract: An initial polygon obtained from a point group is used as a control polygon, and a control point of the control polygon is offset in a normal direction by the shortest distance from a limit surface generated by the control polygon, so that the position of new control point is determined to allow a subdivision surface to interpolate the initial polygon, thereby generating the subdivision surface which interpolates the point group. A first process to determine the point on the subdivision surface at the shortest distance from each control point, and a second process to move and offset the control point in the normal direction from the surface by the distance between the point on the surface and the initial control point, are iterated until the distance between the initial point group and the point on the surface satisfies the threshold or becomes smaller than the threshold, thereby generating the subdivision surface interpolating the initial polygon.Type: GrantFiled: January 15, 2007Date of Patent: July 24, 2012Assignee: National University Corporation Yokohama National UniversityInventors: Takashi Maekawa, Yasunori Matsumoto, Ken Namiki
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Publication number: 20090303235Abstract: An initial polygon obtained from a point group is used as a control polygon, and a control point of the control polygon is offset in a normal direction by the shortest distance from a limit surface generated by the control polygon, so that the position of new control point is determined to allow a subdivision surface to interpolate the initial polygon, thereby generating the subdivision surface which interpolates the point group. A first process to determine the point on the subdivision surface at the shortest distance from each control point, and a second process to move and offset the control point in the normal direction from the surface by the distance between the point on the surface and the initial control point, are iterated until the distance between the initial point group and the point on the surface satisfies the threshold or becomes smaller than the threshold, thereby generating the subdivision surface interpolating the initial polygon.Type: ApplicationFiled: January 15, 2007Publication date: December 10, 2009Applicant: National University Corporation, Yokohama National UniversityInventors: Takashi Maekawa, Yasunori Matsumoto, Ken Namiki