Patents by Inventor Tomonori Mamada
Tomonori Mamada 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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Publication number: 20230313492Abstract: A cooling device includes a casing having a peripheral wall, a plurality of heat exchangers disposed side by side so as to extend transversely in the casing, and a plurality of fans opposed to the plurality of heat exchangers. The casing has a plurality of baffles that extend from the heat exchanger group side toward the cooling fan group side in a space surrounded by the peripheral wall and is arrayed in an arrangement direction of the plurality of heat exchanges. A one side end portion of each baffle is positioned on a boundary between two mutually adjacent heat exchangers or on one of the heat exchangers. The fifth fan is disposed at such a position as to be opposed to one of the plurality of baffles, and other fans are disposed at a position between the peripheral wall and a baffle or between the plurality of baffles.Type: ApplicationFiled: October 19, 2021Publication date: October 5, 2023Inventors: Kazuya KUSANO, Daisuke KAWAGUCHI, Tomonori MAMADA
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Publication number: 20140301839Abstract: An efficient and quiet construction machine has a heat exchanger in which the air flowing out from an axial flow fan avoids collision with the engine. The axial flow fan includes a plurality of blade pieces, a fan ring which guides a flow of air to the axial flow fan, a heat exchanger which is disposed on an upstream side or a downstream side of the flow of air with respect to the axial flow fan, and a structure which is disposed on the downstream side of the flow of air with respect to the axial flow fan. The fan ring includes a suction-side rounded part which reduces a flow channel on a suction side and a discharge-side rounded part which expands the flow channel on a discharge side, and each of the blade pieces is inclined at a sweep forward angle from an axial center toward a rotation direction.Type: ApplicationFiled: November 28, 2012Publication date: October 9, 2014Inventors: Shigehisa Funabashi, Taku Iwase, Makoto Matsushita, Masanori Ezawa, Tomonori Mamada, Osamu Watanabe
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Patent number: 8505499Abstract: A radiator and an oil cooler are arranged at a front surface side of a cooling fan in parallel with each other in a flow direction of the cooling air, an intercooler and a condenser are arranged in parallel at a front surface side of the radiator and oil cooler, and a fuel cooler is arranged at a front surface side of the condenser. By arranging respective heat exchangers such that the heat release amount thereof sequentially increases from the upstream side toward the downstream side in the flow direction of the cooling air, each heat exchanger can efficiently release the heat of the fluid to be cooled. By arranging the fuel cooler at the front surface side of the condenser, two heat exchangers of the condenser and the fuel cooler can be accommodated within a range of the thickness dimension of the intercooler.Type: GrantFiled: August 5, 2010Date of Patent: August 13, 2013Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shigeru Hirasawa, Makoto Matsushita, Tomonori Mamada
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Patent number: 8365855Abstract: A space surrounded by a partition member (26) partitioning between an engine (8) and a heat exchanger (20), a top plate (21D) of a support frame (21) constituting the heat exchanger (20), and a top plate (13A) of an engine cover (13) is defined as an article accommodating space (30). In addition, an article box (32) where tools necessary for a maintenance operation are stored is accommodated in the article accommodating space (30). Thereby even in a hydraulic excavator (1) of a type having a small swing radius at the rear in which the engine (8) and a counterweight (7) are arranged close to each other, by effectively using a top surface side of the heat exchanger (20), it is possible to secure the article accommodating space (30) for accommodating an article such as the article box (32) in a housing cover (12).Type: GrantFiled: May 28, 2009Date of Patent: February 5, 2013Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Tomonori Mamada, Hiroshi Kumagai
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Publication number: 20110088637Abstract: A radiator and an oil cooler are arranged at a front surface side of a cooling fan in parallel with each other in a flow direction of the cooling air, an intercooler and a condenser are arranged in parallel at a front surface side of the radiator and oil cooler, and a fuel cooler is arranged at a front surface side of the condenser. By arranging respective heat exchangers such that the heat release amount thereof sequentially increases from the upstream side toward the downstream side in the flow direction of the cooling air, each heat exchanger can efficiently release the heat of the fluid to be cooled. By arranging the fuel cooler at the front surface side of the condenser, two heat exchangers of the condenser and the fuel cooler can be accommodated within a range of the thickness dimension of the intercooler.Type: ApplicationFiled: August 5, 2010Publication date: April 21, 2011Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Shigeru HIRASAWA, Makoto MATSUSHITA, Tomonori MAMADA
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Publication number: 20100283278Abstract: A space surrounded by a partition member (26) partitioning between an engine (8) and a heat exchanger (20), a top plate (21D) of a support frame (21) constituting the heat exchanger (20), and a top plate (13A) of an engine cover (13) is defined as an article accommodating space (30). In addition, an article box (32) where tools necessary for a maintenance operation are stored is accommodated in the article accommodating space (30). Thereby even in a hydraulic excavator (1) of a type having a small swing radius at the rear in which the engine (8) and a counterweight (7) are arranged close to each other, by effectively using a top surface side of the heat exchanger (20), it is possible to secure the article accommodating space (30) for accommodating an article such as the article box (32) in a housing cover (12).Type: ApplicationFiled: May 28, 2009Publication date: November 11, 2010Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Tomonori Mamada, Hiroshi Kumagai
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Patent number: 7806214Abstract: Mounted on a revolving frame are onboard equipments including engine and heat exchanger. These onboard equipments are accommodated in a housing cover consisted by including a front partition panel. The front partition panel is fixed to a seat screw member which is provided on the revolving frame. At this time, lower end portion of the front partition panel is hung in a floated state above the revolving frame by a stopper which is adapted rest on an upper end portion of the seat screw member. Therefore, lower end portion of the front partition panel is hung in a floated state above a upper surface of a left side frame, facilitating to align a bolt through hole in the front partition panel with a nut of the seat screw member at the time of threading and tightening a bolt into the nut.Type: GrantFiled: October 13, 2006Date of Patent: October 5, 2010Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hiroshi Tsukui, Tomonori Mamada, Hiroshi Kumagai, Yasuhiro Kurumisawa
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Publication number: 20090101375Abstract: Mounted on a revolving frame are onboard equipments including engine and heat exchanger. These onboard equipments are accommodated in a housing cover consisted by including a front partition panel. The front partition panel is fixed to a seat screw member which is provided on the revolving frame. At this time, lower end portion of the front partition panel is hung in a floated state above the revolving frame by a stopper which is adapted rest on an upper end portion of the seat screw member. Therefore, lower end portion of the front partition panel is hung in a floated state above a upper surface of a left side frame, facilitating to align a bolt through hole in the front partition panel with a nut of the seat screw member at the time of threading and tightening a bolt into the nut.Type: ApplicationFiled: October 13, 2006Publication date: April 23, 2009Inventors: Hiroshi Tsukui, Tomonori Mamada, Hiroshi Kumagai, Yasuhiro Kurumisawa
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Patent number: D678359Type: GrantFiled: August 27, 2012Date of Patent: March 19, 2013Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shigehisa Hagura, Kazuhiko Hiraoka, Tomoyuki Miyata, Tomonori Mamada, Makoto Matsushita