Patents by Inventor Takahide Tadokoro

Takahide Tadokoro 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).

  • Publication number: 20210033292
    Abstract: An air-sending device includes a fan and a grille provided downstream of the fan in a direction of airflow generated by the fan. The grille includes a first grille that includes a plurality of first bars spaced from each other, and a second grille that includes a plurality of second bars spaced from each other. The plurality of second bars are more densely arranged than the plurality of first bars. The second grille is provided upstream of the first grille in the direction of the airflow generated by the fan, and spaced from the first grille to face the first grille.
    Type: Application
    Filed: May 22, 2018
    Publication date: February 4, 2021
    Inventors: Takafumi ABE, Takahide TADOKORO, Katsuyuki YAMAMOTO
  • Patent number: 10890194
    Abstract: Provided is an air-sending device in which, in blades, an upstream end of a blade outer periphery is more on an upstream side than an upstream end of a blade inner periphery as seen along a rotation axis, and a downstream end of a blade outer periphery is more on a downstream side than a downstream end of the blade inner periphery, and in which, in the blades, when an angle formed by a line segment, which connects a point internally dividing a line segment connecting the downstream end and the upstream end of an outer periphery of the blades along the rotation axis and a point internally dividing a line segment connecting the downstream end and the upstream end of an inner periphery of the blades along the rotation axis at the same ratio to each other, and a reference line is defined as ?, and a direction inclined toward the downstream side is defined as positive, the angle ? is changed from negative to positive at a duct portion.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: January 12, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takahide Tadokoro, Seiji Nakashima, Yutaka Aoyama, Shuhei Mizutani, Naomichi Tamura
  • Publication number: 20210003140
    Abstract: A propeller fan includes a cylindrical shaft portion provided on a rotation axis of the propeller fan; a plurality of blades provided on an outer peripheral side of the shaft portion; a connection portion provided adjacent to the shaft portion and connecting two of the plurality of blades that are adjacent to each other in a circumferential direction of the propeller fan; a first rib provided on at least one of a pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on a downstream side in the flow of air, and a second rib provided on at least one of a negative-pressure surface of each of the plurality of blades and a surface of part of the connection portion that is located on an upstream side in the flow of air.
    Type: Application
    Filed: August 9, 2017
    Publication date: January 7, 2021
    Inventors: Katsuyuki YAMAMOTO, Takuya TERAMOTO, Takahide TADOKORO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
  • Publication number: 20210003142
    Abstract: A propeller fan according to an embodiment of the present invention includes a shaft provided a rotation axis of the propeller fan, and a blade provided on an outer peripheral side of the shaft. The blade has a trailing edge on a rear side of the blade in a rotation direction of the propeller fan. The trailing edge includes a first trailing edge located on an innermost side of the trailing edge, and a second trailing edge adjacent to and outward of the first trailing edge. Where an innermost point of the first trailing edge is a first connection point, a connection point between the first trailing edge and the second trailing edge is a second connection point, and a straight line that extends through the rotation axis and the first connection point is a reference line, the second connection point is located forward of the reference line in the rotation direction, or located on the reference line, and the second trailing edge is located rearward of the second connection point in the rotation direction.
    Type: Application
    Filed: August 9, 2017
    Publication date: January 7, 2021
    Inventors: Takahide TADOKORO, Takuya TERAMOTO, Katsuyuki YAMAMOTO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
  • Patent number: 10801518
    Abstract: A blower apparatus includes a propeller fan configured to rotate about a rotational axis, and a bell mouth annularly disposed to surround the propeller fan as seen in a direction of the rotational axis of the propeller fan. The bell mouth includes a flare portion located downstream of the propeller fan The flare portion has at least one first part and at least one second part. The first part has a first inner circumferential surface region. The second part as a second inner circumferential surface region. A first length of the first part inner circumferential surface region in the direction of the rotational axis is greater than a second length of the second part inner circumferential surface region in the direction of the rotational axis.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: October 13, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Nakashima, Takahide Tadokoro, Shuhei Mizutani, Yutaka Aoyama
  • Publication number: 20200240429
    Abstract: In a propeller fan, an air-sending device and an air-conditioning apparatus, between a leading edge and trailing edge of each of blades, a starting point at which the first one of first maximum points is located is closer to the leading edge than a starting point at which the first one of second maximum points are located, distances L1 between minimum points and the first maximum points vary such that the distance L1 increases from the starting point at which the first one of the first maximum points is located, toward the trailing edge, and distances L2 between a connection point and the second maximum points vary in accordance with the position of each of the second maximum points such that the distance L2 increases from the starting point at which the first one of the second maximum points is located, toward the trailing edge.
    Type: Application
    Filed: February 28, 2017
    Publication date: July 30, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takahide TADOKORO, Naohiko HONMA
  • Publication number: 20200166048
    Abstract: A propeller fan includes a shaft portion disposed on a rotation axis, and a blade disposed on an outer peripheral side of the shaft portion and including a leading edge and a trailing edge. The blade includes a negative pressure surface in which a plurality of recesses are formed, and the plurality of recesses include a first recess and a second recess disposed on the trailing edge side than the first recess in a circumferential direction about the rotation axis as a center. The first recess has a depth larger than a depth of the second recess.
    Type: Application
    Filed: August 9, 2017
    Publication date: May 28, 2020
    Inventors: Takuya TERAMOTO, Takahide TADOKORO, Katsuyuki YAMAMOTO, Hiroya ITO, Yuki UGAJIN, Shingo HAMADA, Takashi IKEDA, Takafumi ABE
  • Patent number: 10480526
    Abstract: An axial flow fan according to the present invention includes a plurality of blades, each of the blades including: a leading edge formed in front in a direction of rotation of the axial flow fan; an inner circumferential edge formed at an inner circumference of the blades; and an outer circumferential edge formed at an outer circumference of the blades, the outer circumferential edge configured to be at downstream of a fluid, forced to move by the axial flow fan, than the inner circumferential edge, the blade being reflexed toward upstream of the fluid at a portion adjacent to the outer circumferential edge, and having a local angle-decrease section having a blade inlet angle ? at the leading edge decreasing from neighborhood, the local angle-decrease section being formed at a side of the leading edge and being located closer to the outer circumferential edge than to the inner circumferential edge.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: November 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Nakashima, Takahide Tadokoro, Shuhei Mizutani, Yutaka Aoyama
  • Patent number: 10436496
    Abstract: A blade included in an impeller is formed so that, when viewed in a vertical cross-sectional view of the blade, a pressure surface of the blade and a suction surface of the blade opposite to the pressure surface are curved more in the direction in which the impeller rotates, in their areas farther from the axis of rotation of the impeller and closer to the exterior of the blade, and are arched so that a portion near the center of the blade is most distant from a straight line connecting the inner end and the outer end of the blade, the pressure surface and the suction surface form a curved surface including at least one circular arc, and a straight portion of the blade is formed to be connected to the curved surface on its one side, and extend toward the inner end of the blade on its other side.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 8, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi Ikeda, Takahide Tadokoro, Mitsuhiro Shirota, Seiji Hirakawa, Koji Yamaguchi, Koichi Umetsu
  • Publication number: 20190048890
    Abstract: An axial-flow fan includes an impeller including plural blades fixed to an outer peripheral portion of the hub and each surrounded by an inner peripheral edge, an outer peripheral edge, a leading edge, and a trailing edge. The leading edge is forward-curved in a rotational direction with an angle increasing to outer periphery of the impeller and runs toward an outer periphery up to point A, the trailing edge is forward-curved in the rotational direction and runs toward the outer periphery up to point D, recedes in the rotational direction of the impeller as the trailing edge runs toward the outer periphery up to point A? located closer to the outer periphery than point D is to the outer periphery, advances in the rotational direction of the impeller in a region between point A? and point B?, and reflexed at point D and point A?.
    Type: Application
    Filed: September 27, 2016
    Publication date: February 14, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naohiko HONMA, Takahide TADOKORO
  • Publication number: 20190040873
    Abstract: Provided is an air-sending device in which, in blades, an upstream end of a blade outer periphery is more on an upstream side than an upstream end of a blade inner periphery as seen along a rotation axis, and a downstream end of a blade outer periphery is more on a downstream side than a downstream end of the blade inner periphery, and in which, in the blades, when an angle formed by a line segment, which connects a point internally dividing a line segment connecting the downstream end and the upstream end of an outer periphery of the blades along the rotation axis and a point internally dividing a line segment connecting the downstream end and the upstream end of an inner periphery of the blades along the rotation axis at the same ratio to each other, and a reference line is defined as ?, and a direction inclined toward the downstream side is defined as positive, the angle ? is changed from negative to positive at a duct portion.
    Type: Application
    Filed: February 24, 2016
    Publication date: February 7, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takahide TADOKORO, Seiji NAKASHIMA, Yutaka AOYAMA, Shuhei MIZUTANI, Naomichi TAMURA
  • Publication number: 20190010960
    Abstract: A blower apparatus includes a propeller fan configured to rotate about a rotational axis, and a bell mouth annularly disposed to surround the propeller fan as seen in a direction of the rotational axis of the propeller fan. The bell mouth includes a flare portion located downstream of the propeller fan The flare portion has at least one first part and at least one second part. The first part has a first inner circumferential surface region. The second part as a second inner circumferential surface region. A first length of the first part inner circumferential surface region in the direction of the rotational axis is greater than a second length of the second part inner circumferential surface region in the direction of the rotational axis.
    Type: Application
    Filed: February 26, 2016
    Publication date: January 10, 2019
    Inventors: Seiji NAKASHIMA, Takahide TADOKORO, Shuhei MIZUTANI, Yutaka AOYAMA
  • Patent number: 10145601
    Abstract: An outdoor unit according to the present invention includes an air-sending-device chamber including a heat exchanger disposed at least on the rear side within an outdoor unit body, a propeller fan having a plurality of blades and disposed on the front side of the heat exchanger, and a bell mouth disposed on the front side of the propeller fan to face an air outlet, a machine chamber in which a compressor is disposed, and a partition plate that separates the air-sending-device chamber and the machine chamber. The partition plate has a protruding shape protruding from the air-sending-device chamber toward the machine chamber. The partition plate has, on the side of the air-sending-device chamber, a recessed area corresponding to the protruding shape. The amount of recess of the recessed area is maximized at a position equal in height to the center of rotation of the propeller fan.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: December 4, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Kono, Takahide Tadokoro
  • Publication number: 20180238344
    Abstract: An axial flow fan according to the present invention includes a plurality of blades, each of the blades including: a leading edge formed in front in a direction of rotation of the axial flow fan; an inner circumferential edge formed at an inner circumference of the blades; and an outer circumferential edge formed at an outer circumference of the blades, the outer circumferential edge configured to be at downstream of a fluid, forced to move by the axial flow fan, than the inner circumferential edge, the blade being reflexed toward upstream of the fluid at a portion adjacent to the outer circumferential edge, and having a local angle-decrease section having a blade inlet angle ? at the leading edge decreasing from neighborhood, the local angle-decrease section being formed at a side of the leading edge and being located closer to the outer circumferential edge than to the inner circumferential edge.
    Type: Application
    Filed: November 2, 2015
    Publication date: August 23, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Seiji NAKASHIMA, Takahide TADOKORO, Shuhei MIZUTANI, Yutaka AOYAMA
  • Patent number: 10047764
    Abstract: In a blade cross-sectional view, assuming that a tangent at an end of the outer periphery is defined as LQ, an imaginary line orthogonal to the rotation axis is defined as LO, an angle formed by the tangent (LQ) and the imaginary line (LO) is defined as an outer peripheral end tangent angle (?), and a position at which an imaginary plane including a position of an intake-side end portion of the bellmouth and a peripheral edge of the blade cross each other is defined as an overlap starting point, the outer peripheral end tangent angle on a trailing edge portion side with respect to a blade cross section including the overlap starting point is set to be smaller than the outer peripheral end tangent angle on a leading edge portion side with respect to the blade cross section including the overlap starting point.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: August 14, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
  • Publication number: 20180156475
    Abstract: An outdoor unit 1 of an air-conditioning apparatus includes a housing having a box shape and including air inlets formed on side surfaces and an air outlet formed on an upper surface, a fan provided to an upper side in the housing and configured to discharge, through the air outlet, outside air sucked through the air inlets, and a heat exchanger provided in the housing along each of the air inlets. The heat exchanger includes an upper heat exchanger disposed at an upper part of the housing and a lower heat exchanger disposed at a lower part of the housing. In plan view, the housing has different widths in short-side and long-side directions, and the width in the short-side direction at the upper part of the housing is longer than the width in the short-side direction at the lower part of the housing.
    Type: Application
    Filed: May 14, 2015
    Publication date: June 7, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takahide TADOKORO, Seiji NAKASHIMA, Shinya HIGASHIIUE, Naomichi TAMURA
  • Patent number: 9970454
    Abstract: A propeller fan, including: a boss; and a plurality of blades, each of the plurality of blades including a pressure surface and a suction surface, in which: when a connecting portion between the pressure surface and a side surface of the boss is defined as a pressure surface-side boundary portion, and a connecting portion between the suction surface and the side surface of the boss is defined as a suction surface-side boundary portion, a curvature of the suction surface-side boundary portion is smaller than a curvature of the pressure surface-side boundary portion; and as a blade area projected on a plane orthogonal to the rotation axis, a blade area of the suction surface is larger than a blade area of the pressure surface.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: May 15, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
  • Patent number: 9897108
    Abstract: An inner peripheral side of the blade with respect to an apex (P) of the leading edge protruding portion extends forward in the fan rotating direction with respect to the apex (P). A radius (Rq) at a position of an apex (Q) of the trailing edge protruding portion is larger than a radius (Rp) at a position of the apex (P). The radius (Rq) at the position of the apex (Q) is larger than an intermediate radius (Rm) between a radius (Ro) of an outer peripheral edge and a radius (Ri) of an inner peripheral edge.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: February 20, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
  • Patent number: 9874227
    Abstract: An air blower includes a casing having an air inlet portion and an air outlet portion, a fan, and a fan guard. The fan includes a boss portion and a plurality of blades. The fan guard includes a guide portion having a tubular outer shape, which protrudes toward the fan. A center in a distal end shape, which is defined by a contour line of a distal end portion of the guide portion, matches with a rotation axis of the boss portion. A center in a root shape, which is defined by a contour line of a root portion of the guide portion, is shifted with respect to the rotation axis of the boss portion.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: January 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
  • Patent number: D858737
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: September 3, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Seiji Nakashima, Yutaka Aoyama, Shuhei Mizutani, Naomichi Tamura