Patents by Inventor Kazuya Kumagai
Kazuya Kumagai 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).
-
Patent number: 11469638Abstract: Two types of insulating members, i.e., end surface insulators and slot insulators are provided. On tooth portion sides of both side surfaces in the circumferential direction of tooth end surface covering portions of the end surface insulator, first cutouts recessed in the circumferential direction are provided so as to extend in the radial direction. A part axially upward of the first cutouts protrudes in the circumferential direction to form a first overhang portion, and the slot insulator is accommodated between the first overhang portions of two end surface insulators.Type: GrantFiled: March 15, 2019Date of Patent: October 11, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shuichi Kitano, Masahiro Nigo, Kazuya Kumagai, Ryo Ishida, Hironori Tsuiki, Moriyuki Hazeyama
-
Patent number: 11458434Abstract: There are provided a downcomer pipe that can achieve suppression of accumulation of deposits in use and simplification of operation when being installed into a partition wall, an installation member and a desulfurization apparatus. The downcomer pipe comprises a pipe-shaped member and an installation member for installing the pipe-shaped member into the partition wall. The installation member includes a pipe-shaped part whose inner wall is to be brought into contact with the outer wall of the pipe-shaped member and a protruding part arranged on the outer wall of the pipe-shaped part, the pipe-shaped part and the protruding part constituting an integrated member.Type: GrantFiled: April 24, 2018Date of Patent: October 4, 2022Assignee: CHIYODA CORPORATIONInventors: Kazuya Kumagai, Naobumi Kurosaki
-
Patent number: 11264848Abstract: A rotor core has first and second magnet insertion holes along an outer circumference, and first and second slits along an inner circumference. The first and second slits have first and second facing portions facing each other. The first facing portion has a first inner end and a first outer end. The second facing portion has a second inner end and a second outer end. An inter-slit portion is provided between the first and second facing portions and is defined by a first straight line connecting the first and second inner ends and a second straight line connecting the first and second outer ends. In a radial direction of the rotor core, a minimum distance D1 from the inner circumference to the slits, a minimum width W1 of the slits, and a length W2 of the inter-slit portion satisfy at least one of D1<W1 and D1<W2.Type: GrantFiled: March 27, 2017Date of Patent: March 1, 2022Assignee: Mitsubishi Electric CorporationInventors: Koji Yabe, Yoshikazu Fujisue, Kazuya Kumagai, Takahiro Tsutsumi
-
Patent number: 11198092Abstract: This invention provides a continuous liquid phase type wet exhaust gas treatment method for removing sulfur oxides from exhaust gas and collecting it as gypsum, which method is simple and humidifying liquid is uniformly sprayed into exhaust gas with it. The method is characterized in that humidifying liquid is injected downwardly in a region where exhaust gas flows vertically downwardly.Type: GrantFiled: January 10, 2019Date of Patent: December 14, 2021Assignee: CHIYODA CORPORATIONInventors: Kazuya Kumagai, Hironobu Marukawa
-
Publication number: 20210281127Abstract: When a laminated core is formed in an annular shape, a radially inner part of a contact surface formed by a projecting end of a first core piece and a recessed end of another first core piece that are adjacent in a circumferential direction, and a radially inner part of a contact surface formed by a projecting end of a second core piece and a recessed end of another second core piece that are adjacent in the circumferential direction, are positioned in a plane including a center axis of the annular laminated core.Type: ApplicationFiled: April 15, 2019Publication date: September 9, 2021Applicant: Mitsubishi Electric CorporationInventors: Takafumi ICHIDA, Kazuya KUMAGAI, Yuta MORI, Yoshinori IWANABE
-
Patent number: 10978923Abstract: An electric motor includes a stator and a rotor including a permanent magnet and an electromagnetic steel sheet. The electromagnetic steel sheet includes a magnet insertion hole, a first outer peripheral surface including an inter-pole part of the rotor, a second outer peripheral surface including a magnetic pole center part of the rotor, a first slit elongated in a circumferential direction of the rotor, and a first portion formed between the first slit and the magnet insertion hole. A distance from the first outer peripheral surface to the stator is larger than a distance from the second outer peripheral surface to the stator. The electric motor satisfies ?a<?b, where ?a is a first angle formed by a first line and a second line and ?b is a second angle formed by a third line and the second line.Type: GrantFiled: January 31, 2017Date of Patent: April 13, 2021Assignee: Mitsubishi Electric CorporationInventors: Koji Yabe, Yoshikazu Fujisue, Kazuya Kumagai, Takahiro Tsutsumi
-
Publication number: 20210050757Abstract: Two types of insulating members, i.e., end surface insulators and slot insulators are provided. On tooth portion sides of both side surfaces in the circumferential direction of tooth end surface covering portions of the end surface insulator, first cutouts recessed in the circumferential direction are provided so as to extend in the radial direction. A part axially upward of the first cutouts protrudes in the circumferential direction to form a first overhang portion, and the slot insulator is accommodated between the first overhang portions of two end surface insulators.Type: ApplicationFiled: March 15, 2019Publication date: February 18, 2021Applicant: Mitsubishi Electric CorporationInventors: Shuichi KITANO, Masahiro NIGO, Kazuya KUMAGAI, Ryo ISHIDA, Hironori TSUIKI, Moriyuki HAZEYAMA
-
Patent number: 10897168Abstract: A magnetizing method includes the steps of preparing a rotor comprising a rotor core having a magnet insertion hole and a permanent magnet provided in the magnet insertion hole, placing the rotor so as to face a tooth around which a winding is wound, rotating the rotor in a first rotating direction by a first angle ?1 from a rotational position where a center of the magnet insertion hole in a circumferential direction of the rotor core faces a middle portion between both ends of the winding in the circumferential direction and supplying electric current to the winding, and rotating the rotor in a second rotating direction opposite to the first rotating direction by a second angle ?2 from the rotational position direction and supplying electric current to the winding. The second angle ?2 is smaller than the first angle ?1.Type: GrantFiled: January 27, 2016Date of Patent: January 19, 2021Assignee: Mitsubishi Electric CorporationInventors: Koji Yabe, Yoshikazu Fujisue, Kazuya Kumagai, Takahiro Tsutsumi
-
Publication number: 20200398218Abstract: This invention provides a continuous liquid phase type wet exhaust gas treatment method for removing sulfur oxides from exhaust gas and collecting it as gypsum, which method is simple and humidifying liquid is uniformly sprayed into exhaust gas with it. The method is characterized in that humidifying liquid is injected downwardly in a region where exhaust gas flows vertically downwardly.Type: ApplicationFiled: January 10, 2019Publication date: December 24, 2020Applicant: CHIYODA CORPORATIONInventors: Kazuya KUMAGAI, Hironobu MARUKAWA
-
Patent number: 10843115Abstract: The impurity removal method removes impurities in an exhaust gas and includes forming a froth layer in a tank, by blowing the exhaust gas into an absorbing liquid contained in the tank via a gas dispersion pipe, wherein, given that a proportion of the gas occupying the froth layer is defined as a gas holdup, impurities such as soot dust included in a gas such as an exhaust gas is removed efficiently and at a low cost by setting a gas holdup in the froth layer to be 0.4˜0.9, setting a height of the froth layer to be 0.2˜1.8 m, and setting a gas-liquid contact area per unit volume of the froth layer to be 1500˜2500 m2/m3.Type: GrantFiled: February 22, 2019Date of Patent: November 24, 2020Assignee: CHIYODA CORPORATIONInventors: Takao Kameda, Noboru Takei, Kazuya Kumagai, Sosuke Kido, Masataka Uemura
-
Patent number: 10780386Abstract: A liquid film dust arrester is installed to face a gas flow containing dust and flowing out from a gas discharge pipe. The arrester includes a gas flow blocking unit arranged vis-à-vis the gas flow, a liquid dispersion unit having a dispersion section arranged at a position near the center of the gas flow blocking unit and upstream relative to the gas flow blocking unit as viewed in the flowing direction of the gas flow so as to face the gas flow blocking unit, a liquid ejection unit having an ejection port disposed vis-à-vis the dispersion section and configured to eject liquid from the ejection port, and a liquid film forming unit. The dispersion section comprises a smooth surface that causes the ejected liquid to flow and disperse on the smooth surface, and the liquid film is formed to face the gas flow flowing through the flow path.Type: GrantFiled: November 29, 2016Date of Patent: September 22, 2020Assignee: CHIYODA CORPORATIONInventors: Kazuya Kumagai, Hirokazu Yasuda, Naobumi Kurosaki
-
Patent number: 10700563Abstract: A rotor includes a rotor core having a magnet insertion hole and a permanent magnet provided in the magnet insertion hole. The rotor core has a slit on an outer side of the magnet insertion hole in a radial direction of the rotor core. The permanent magnet is magnetized by placing the rotor so as to face a tooth around which a winding is wound, rotating the rotor in a first rotating direction from a rotational position where a center of the magnet insertion hole in a circumferential direction of the rotor core faces a middle portion between both ends of the winding in the circumferential direction and supplying electric current to the winding, and rotating the rotor in a second rotating direction opposite to the first rotating direction from the rotational position and supplying electric current to the winding.Type: GrantFiled: January 27, 2016Date of Patent: June 30, 2020Assignee: Mitsubishi Electric CorporationInventors: Koji Yabe, Yoshikazu Fujisue, Kazuya Kumagai, Takahiro Tsutsumi
-
Publication number: 20200164310Abstract: A flue gas desulfurization system that suppresses accumulation of solids on the bottom surface of the desulfurized flue gas inflow chamber of the system is provided. the system includes an absorber solution chamber so that the flue gas can be blown into the solution, a desulfurized flue gas inflow chamber for receiving the inflow of the desulfurized flue gas, a gas flow pipe penetrating between the absorber solution chamber and the desulfurized flue gas inflow chamber to allow the desulfurized flue gas to pass through the pipe, a cleansing solution feed pipe for feeding cleansing solution into the desulfurized flue gas inflow chamber, and at least one cleansing solution discharge pipe, discharging the fed cleansing solution from the desulfurized flue gas inflow chamber. The desulfurized flue gas inflow chamber has a bottom surface including a protrusion zone having a plurality of protrusions. Each protrusion has an inclined top surface.Type: ApplicationFiled: November 29, 2016Publication date: May 28, 2020Applicant: CHIYODA CORPORATIONInventor: Kazuya Kumagai
-
Patent number: 10661222Abstract: A flue gas desulfurization system that suppresses accumulation of solids on the bottom surface of the desulfurized flue gas inflow chamber of the system is provided, the system includes an absorber solution chamber so that the flue gas can be blown into the solution, a desulfurized flue gas inflow chamber for receiving the inflow of the desulfurized flue gas, a gas flow pipe penetrating between the absorber solution chamber and the desulfurized flue gas inflow chamber to allow the desulfurized flue gas to pass through the pipe, a cleansing solution feed pipe for feeding cleansing solution into the desulfurized flue gas inflow chamber, and at least one cleansing solution discharge pipe, discharging the fed cleansing solution from the desulfurized flue gas inflow chamber. The desulfurized flue gas inflow chamber has a bottom surface including a protrusion zone having a plurality of protrusions. Each protrusion has an inclined top surface.Type: GrantFiled: November 29, 2016Date of Patent: May 26, 2020Assignee: CHYODA CORPORATIONInventor: Kazuya Kumagai
-
Publication number: 20200155998Abstract: There are provided a downcomer pipe that can achieve suppression of accumulation of deposits in use and simplification of operation when being installed into a partition wall, an installation member and a desulfurization apparatus. The downcomer pipe comprises a pipe-shaped member and an installation member for installing the pipe-shaped member into the partition wall. The installation member includes a pipe-shaped part whose inner wall is to be brought into contact with the outer wall of the pipe-shaped member and a protruding part arranged on the outer wall of the pipe-shaped part, the pipe-shaped part and the protruding part constituting an integrated member.Type: ApplicationFiled: April 24, 2018Publication date: May 21, 2020Applicant: CHIYODA CORPORATIONInventors: Kazuya Kumagai, Naobumi Kurosaki
-
Publication number: 20200014259Abstract: A rotor core has first and second magnet insertion holes along an outer circumference, and first and second slits along an inner circumference. The first and second slits have first and second facing portions facing each other. The first facing portion has a first inner end and a first outer end. The second facing portion has a second inner end and a second outer end. An inter-slit portion is provided between the first and second facing portions and is defined by a first straight line connecting the first and second inner ends and a second straight line connecting the first and second outer ends. In a radial direction of the rotor core, a minimum distance D1 from the inner circumference to the slits, a minimum width W1 of the slits, and a length W2 of the inter-slit portion satisfy at least one of D1<W1 and D1<W2.Type: ApplicationFiled: March 27, 2017Publication date: January 9, 2020Inventors: Koji YABE, Yoshikazu FUJISUE, Kazuya KUMAGAI, Takahiro TSUTSUMI
-
Publication number: 20190356185Abstract: An electric motor includes a stator and a rotor including a permanent magnet and an electromagnetic steel sheet. The electromagnetic steel sheet includes a magnet insertion hole, a first outer peripheral surface including an inter-pole part of the rotor, a second outer peripheral surface including a magnetic pole center part of the rotor, a first slit elongated in a circumferential direction of the rotor, and a first portion formed between the first slit and the magnet insertion hole. A distance from the first outer peripheral surface to the stator is larger than a distance from the second outer peripheral surface to the stator. The electric motor satisfies ?a<?b, where ?a is a first angle formed by a first line and a second line and ?b is a second angle formed by a third line and the second line.Type: ApplicationFiled: January 31, 2017Publication date: November 21, 2019Applicant: Mitsubishi Electric CorporationInventors: Koji YABE, Yoshikazu FUJISUE, Kazuya KUMAGAI, Takahiro TSUTSUMI
-
Patent number: 10468953Abstract: A stator of an electric motor (40) has windings (44) and a stator core (43) in which eighteen teeth (71), around which the windings (44) are wound, are formed circumferentially. A rotor of the electric motor (40) has magnets (72) and a rotor core (46) in which six insertion holes (73), into which the magnets (72) are inserted, are formed circumferentially. The magnets (72) are rare-earth magnets of a grain boundary diffusion type having a residual magnetic flux density Br of from 1.36 to 1.42 T. The total area of magnet-parallel cross-sections (84) of the teeth (71) is from 0.56 times to 0.93 times the total area of tooth-facing surfaces (83) of the magnets (72).Type: GrantFiled: July 29, 2015Date of Patent: November 5, 2019Assignee: Mitsubishi Electric CorporationInventors: Yoshikazu Fujisue, Kazuya Kumagai
-
Patent number: 10432050Abstract: A motor rotor includes a rotor core having a plurality of magnet insertion holes in each of which a permanent magnet is inserted, a flow path formed on a radially inner side of the plurality of magnet insertion holes to allow a fluid to flow through, and a shaft insertion hole in which a rotary shaft is inserted, and the permanent magnet inserted in each of the plurality of magnet insertion holes of the rotor core. The rotor core has an inlet opening and an outlet opening each opened in a corresponding one of end faces of the rotor core in an axial direction, and a communication hole circumferentially extending inside the rotor core and communicating with the inlet opening and the outlet opening.Type: GrantFiled: March 9, 2015Date of Patent: October 1, 2019Assignee: Mitsubishi Electric CorporationInventor: Kazuya Kumagai
-
Publication number: 20190184325Abstract: The impurity removal method removes impurities in an exhaust gas and includes forming a froth layer in a tank, by blowing the exhaust gas into an absorbing liquid contained in the tank via a gas dispersion pipe, wherein, given that a proportion of the gas occupying the froth layer is defined as a gas holdup, impurities such as soot dust included in a gas such as an exhaust gas is removed efficiently and at a low cost by setting a gas holdup in the froth layer to be 0.4˜0.9, setting a height of the froth layer to be 0.2˜1.8 m, and setting a gas-liquid contact area per unit volume of the froth layer to be 1500˜2500 m2/m3.Type: ApplicationFiled: February 22, 2019Publication date: June 20, 2019Inventors: Takao KAMEDA, Noboru TAKEI, Kazuya KUMAGAI, Sosuke KIDO, Masataka UEMURA