Patents by Inventor Kaname Maruyama

Kaname Maruyama 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: 11073302
    Abstract: This indoor unit of an air conditioner includes an indoor unit main body having an inlet and an outlet; a heat exchanger; and a cross-flow fan configured to blow out air, which has undergone heat exchange by the heat exchanger. The cross-flow fan has a blow-out flow path that is configured such that a cross-sectional area gradually increases downward, with the blow-out flow path guiding blown-out air to the outlet. When a distance in the lower wall from an intersection, where a tangent inscribing a tongue of the cross-flow fan orthogonally intersects the lower wall, to a lower end of the indoor unit main body is referred to as distance L, a ratio (L/D) of the distance L to outer diameter D of an impeller of the cross-flow fan is less than 0.05. At least part of the blow-out flow path is formed to project out of the outlet at least when air conditioning operation is performed.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: July 27, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Hironobu Teraoka, Hideshi Tanaka, Satoshi Nakai, Masahito Higashida, Masafumi Uda, Kaname Maruyama, Zuozhou Chen
  • Publication number: 20210048220
    Abstract: This indoor unit of an air conditioner includes an indoor unit main body having an inlet and an outlet; a heat exchanger; and a cross-flow fan configured to blow out air, which has undergone heat exchange by the heat exchanger. The cross-flow fan has a blow-out flow path that is configured such that a cross-sectional area gradually increases downward, with the blow-out flow path guiding blown-out air to the outlet. When a distance in the lower wall from an intersection, where a tangent inscribing a tongue of the cross-flow fan orthogonally intersects the lower wall, to a lower end of the indoor unit main body is referred to as distance L, a ratio (L/D) of the distance L to outer diameter D of an impeller of the cross-flow fan is less than 0.05. At least part of the blow-out flow path is formed to project out of the outlet at least when air conditioning operation is performed.
    Type: Application
    Filed: February 26, 2019
    Publication date: February 18, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hironobu TERAOKA, Hideshi TANAKA, Satoshi NAKAI, Masahito HIGASHIDA, Masafumi UDA, Kaname MARUYAMA, Zuozhou CHEN
  • Publication number: 20210033288
    Abstract: This indoor unit of an air conditioner includes an indoor unit body including an inlet and an outlet; a heat exchanger that performs heat exchange on air drawn in from the inlet; and a cross-flow fan configured to blow out air, which has undergone heat exchange performed by the heat exchanger from the outlet. The cross-flow fan includes a blow-out flow path formed by a lower wall, left and right side walls, and an upper wall so that a cross-sectional area gradually increases downward, with the blow-out flow path guiding blown-out air to the outlet. The two side walls are arranged to project out of the outlet at least when an air conditioning operation is performed.
    Type: Application
    Filed: February 26, 2019
    Publication date: February 4, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hironobu TERAOKA, Hideshi TANAKA, Satoshi NAKAI, Masahito HIGASHIDA, Masafumi UDA, Kaname MARUYAMA, Zuozhou CHEN
  • Publication number: 20200088211
    Abstract: Blades (20a to 20c) of a propeller fan (10) have different circumferential pitches ?1, ?2, and ?3. The blades (20a to 20c) have different masses so that the center of gravity of the propeller fan (10) is positioned on a rotational center axis (11) of the propeller fan (10). Blade body portions (42c) of the blades (20a to 20c) have different thicknesses. In contrast, camber lines of the blades (20a to 20c) in blade cross section have the same shape, projections of the blades (20a to 20c) on a plane perpendicular to the rotational center axis (11) of the propeller fan (10) have the same shape, and leading edge portions (41a to 41c) of the blades (20a to 20c) have the same shape. As a result, a propeller fan (10) having reduced noise and vibrations can be achieved.
    Type: Application
    Filed: May 28, 2018
    Publication date: March 19, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tooru IWATA, Hirotaka TOMIOKA, Kaname MARUYAMA
  • Patent number: 10480817
    Abstract: The duct-type indoor unit of an air conditioner includes: a casing including a first surface and a second surface opposing each other, an inlet duct connection part which is formed in the first surface and to which an inlet duct is connected, and an outlet duct connection part which is formed in the second surface and to which an outlet duct is connected; a partition member partitioning interior of the casing into a first space on an inlet side and a second space on an outlet side, the partitioning member having an opening communicating the first space with the second space; a heat exchanger arranged inside the first space; and a centrifugal fan having an impeller with backward curved blades, the impeller being positioned inside the second space to suck in air in the first space through the opening. The impeller has a rotating shaft parallel to the first surface.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: November 19, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi Kashihara, Takahiro Yamasaki, Kaname Maruyama
  • Patent number: 10274222
    Abstract: A fan unit includes a fan case, a partition member and a centrifugal fan. The fan case has an inflow port and a blowout port. The fan case includes a unit connecting portion for connecting the heat exchange unit. The partition member partitions an inside of the fan case into an upstream side space and a downstream side space. The partition member has an opening for allowing the upstream side space and the downstream side space to communicate with each other. The centrifugal fan includes an impeller including a plurality of backward curved blades. The centrifugal fan is arranged such that the impeller is located in the downstream side space and sucks air in the upstream side space through the opening. The blowout port is located on an outer side in a radial direction of the impeller in the downstream side space.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: April 30, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi Kashihara, Takahiro Yamasaki, Kaname Maruyama
  • Patent number: 9903386
    Abstract: An air conditioning apparatus includes a casing having intake and blow-out ports, a partition member dividing an interior of the casing, a heat exchanger and a centrifugal fan. The centrifugal fan includes a hub and a bladed wheel having a plurality of rearward blades and sucks air existing in the heat exchanger compartment into the fan compartment through the fan entrance. The bladed wheel is mounted in the fan compartment such that a rotary shaft of the bladed wheel is oriented along an opening direction of the fan entrance and an opening direction of the blow-out port. The hub connects blow-out port side ends of the plural rearward blades and is configured to be rotated about the rotary shaft. The hub has an outer diameter smaller than an outer diameter of the rearward blades.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: February 27, 2018
    Assignee: Daikin Industries, Ltd.
    Inventors: Takahiro Yamasaki, Takashi Kashihara, Kaname Maruyama, Tsunehisa Sanagi, Naofumi Yokoyama
  • Publication number: 20150354584
    Abstract: A centrifugal fan includes a hub, a plurality of blades, and a shroud. The blades each have a curved part that is curved to incline toward a side on which air impinges when a connected end connected to an inwardly protruding portion of the shroud moves in a rotating direction of the centrifugal fan. The hub includes a hub-side diffuser ring that protrudes radially outward of the blades. The shroud includes a shroud-side diffuser ring that protrudes radially outward of the blades.
    Type: Application
    Filed: December 18, 2013
    Publication date: December 10, 2015
    Inventors: Tooru IWATA, Kaname MARUYAMA, Shimei TEI
  • Publication number: 20150330403
    Abstract: An air conditioning apparatus includes a casing having intake and blow-out ports, a partition member dividing an interior of the casing, a heat exchanger and a centrifugal fan. The centrifugal fan includes a hub and a bladed wheel having a plurality of rearward blades and sucks air existing in the heat exchanger compartment into the fan compartment through the fan entrance. The bladed wheel is mounted in the fan compartment such that a rotary shaft of the bladed wheel is oriented along an opening direction of the fan entrance and an opening direction of the blow-out port. The hub connects blow-out port side ends of the plural rearward blades and is configured to be rotated about the rotary shaft. The hub has an outer diameter smaller than an outer diameter of the rearward blades.
    Type: Application
    Filed: May 11, 2015
    Publication date: November 19, 2015
    Inventors: Takahiro YAMASAKI, Takashi KASHIHARA, Kaname MARUYAMA, Tsunehisa SANAGI, Naofumi YOKOYAMA
  • Publication number: 20150068711
    Abstract: The duct-type indoor unit of an air conditioner includes: a casing including a first surface and a second surface opposing each other, an inlet duct connection part which is formed in the first surface and to which an inlet duct is connected, and an outlet duct connection part which is formed in the second surface and to which an outlet duct is connected; a partition member partitioning interior of the casing into a first space on an inlet side and a second space on an outlet side, the partitioning member having an opening communicating the first space with the second space; a heat exchanger arranged inside the first space; and a centrifugal fan having an impeller with backward curved blades, the impeller being positioned inside the second space to suck in air in the first space through the opening. The impeller has a rotating shaft parallel to the first surface.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi KASHIHARA, Takahiro YAMASAKI, Kaname MARUYAMA
  • Publication number: 20150071775
    Abstract: A fan unit includes a fan case, a partition member and a centrifugal fan. The fan case has an inflow port and a blowout port. The fan case includes a unit connecting portion for connecting the heat exchange unit. The partition member partitions an inside of the fan case into an upstream side space and a downstream side space. The partition member has an opening for allowing the upstream side space and the downstream side space to communicate with each other. The centrifugal fan includes an impeller including a plurality of backward curved blades. The centrifugal fan is arranged such that the impeller is located in the downstream side space and sucks air in the upstream side space through the opening. The blowout port is located on an outer side in a radial direction of the impeller in the downstream side space.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi KASHIHARA, Takahiro YAMASAKI, Kaname MARUYAMA
  • Publication number: 20020189048
    Abstract: A downsized vacuum cleaner whose filter is less likely to be clogged. An electric motor 2 and a fan 3 are provided within a cleaner body 1. A dust collecting section 16 is formed annular so as to surround the circumference of the fan 3. A filter 12 for filtering dust is mounted at an inside peripheral face of the dust collecting section 16 and dust separated by the filter 12 is collected in the dust collecting section 16. A flectional portion 35 is formed at an upper end of a suction tube 32, facing the dust collecting section 16 so that an airflow flowing along a peripheral direction of the dust collecting section 16 is generated. This causes comparatively larger-sized dust to be pressed, by a centrifugal force, against an inside wall of an outer peripheral side of the dust collecting section 16 so that only small-sized dust is filtered by the filter 12, preventing the filter 12 from being clogged.
    Type: Application
    Filed: June 18, 2002
    Publication date: December 19, 2002
    Applicant: TWINBIRD CORPORATION
    Inventors: Kaname Maruyama, Toshiaki Ogawa, Shuichi Taniguchi, Mineyuki Inoue, Takeshi Yamada
  • Patent number: 6375339
    Abstract: A lighting apparatus which enables a shade to be easily attached, detached and rotated with a simple structure and an enhanced degree of freedom in design. Grooves 9,10 defining arc-shaped portions 15,16, respectively, are formed around an axis of a head 4, to which is mounted a fluorescent light bulb 7. A shade 8 which is formed with protrusions 17, 18 opposite to the grooves 9, 10 is mounted to the head 4 so as to cover the fluorescent light bulb 7. By pressing the protrusions 17, 18 of the shade 8 into the grooves 9, 10 of the head 4, the shade 8 can be very easily mounted to the head 4. By lifting up the shade 8 from the head 4, the shade 8 can be very easily removed from the head 4. In addition, the shade 8 can be rotated by allowing the protrusions 17, 18 formed on the shade 8 to slide along the arc-shaped portions 15, 16. As such shade 8 allows a simple integral structure, degree of freedom in designing a lighting apparatus can be enhanced.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: April 23, 2002
    Assignee: Twinbird Corporation
    Inventors: Kaname Maruyama, Takashi Honda, Shuichi Taniguchi, Masahiko Hori
  • Patent number: D502845
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: March 15, 2005
    Assignee: The Coleman Company, Inc.
    Inventors: Mitchell L. Wilgus, Kaname Maruyama
  • Patent number: D515259
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: February 14, 2006
    Assignee: Twinbird Corporation
    Inventors: Kaname Maruyama, Kazuya Kondo
  • Patent number: D516099
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: February 28, 2006
    Assignee: Twinbird Corporation
    Inventor: Kaname Maruyama
  • Patent number: D518932
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: April 11, 2006
    Assignee: Twinbird Corporation
    Inventors: Kaname Maruyama, Kazuya Kondo
  • Patent number: D461786
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: August 20, 2002
    Assignee: Twinbird Corporation
    Inventor: Kaname Maruyama
  • Patent number: D482506
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: November 18, 2003
    Assignee: Twinbird Corporation
    Inventors: Takashi Honda, Kaname Maruyama
  • Patent number: D569106
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: May 20, 2008
    Assignee: Twinbird Corporation
    Inventor: Kaname Maruyama