Patents by Inventor Hitoshi Nishiguchi
Hitoshi Nishiguchi 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: 11680583Abstract: A construction machine includes a centrifugal fan, and a bell mouth arranged on the suction side of the centrifugal fan. The centrifugal fan has a rotatable hub, an annular shroud arranged so as to face the hub and having a suction port, and multiple blades provided between the hub and the shroud. An outlet of the bell mouth is arranged on the radially inner side of the suction port of the shroud. Each blade is formed such that: a leading edge has a convex shape protruding toward a suction surface relative to a line segment linking a connection of the leading edge with the hub and a connection of the leading edge with the shroud; and a vertex of the convex shape of the leading edge is positioned on a radially inner side of a wall surface of the outlet of the bell mouth when the suction side of the centrifugal fan is seen in an axis direction.Type: GrantFiled: October 10, 2019Date of Patent: June 20, 2023Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Daiwa Sato, Kazuya Kusano, Hitoshi Nishiguchi, Kunihiko Ikeda, Kenichi Hano
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Publication number: 20210372431Abstract: A construction machine includes a centrifugal fan, and a bell mouth arranged on the suction side of the centrifugal fan. The centrifugal fan has a rotatable hub, an annular shroud arranged so as to face the hub and having a suction port, and multiple blades provided between the hub and the shroud. An outlet of the bell mouth is arranged on the radially inner side of the suction port of the shroud. Each blade is formed such that: a leading edge has a convex shape protruding toward a suction surface relative to a line segment linking a connection of the leading edge with the hub and a connection of the leading edge with the shroud; and a vertex of the convex shape of the leading edge is positioned on a radially inner side of a wall surface of the outlet of the bell mouth when the suction side of the centrifugal fan is seen in an axis direction.Type: ApplicationFiled: October 10, 2019Publication date: December 2, 2021Inventors: Daiwa SATO, Kazuya KUSANO, Hitoshi NISHIGUCHI, Kunihiko IKEDA, Kenichi HANO
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Patent number: 11085352Abstract: There is provided a urea water supply device (25) that is disposed in a urea water pipe line (23) to supply urea water toward a urea water injection valve (21) from a urea water tank (22). A bracket (24) for attaching the urea water supply device (25) is attached to a revolving frame (5) of an upper revolving structure (3). A cover (31) for covering the urea water supply device (25) is attached to the bracket (24). On top of that, a urea water filter (33) that is disposed in the urea water pipe line (23) and traps foreign objects mixed into the urea water is attached to the cover (31).Type: GrantFiled: January 31, 2019Date of Patent: August 10, 2021Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Toshinori Fujii, Hitoshi Nishiguchi, Masaharu Imi
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Publication number: 20200256232Abstract: There is provided a urea water supply device (25) that is disposed in a urea water pipe line (23) to supply urea water toward a urea water injection valve (21) from a urea water tank (22). A bracket (24) for attaching the urea water supply device (25) is attached to a revolving frame (5) of an upper revolving structure (3). A cover (31) for covering the urea water supply device (25) is attached to the bracket (24). On top of that, a urea water filter (33) that is disposed in the urea water pipe line (23) and traps foreign objects mixed into the urea water is attached to the cover (31).Type: ApplicationFiled: January 31, 2019Publication date: August 13, 2020Inventors: Toshinori FUJII, Hitoshi NISHIGUCHI, Masaharu IMI
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Patent number: 10711437Abstract: A bypass line (35) having one end side connected to a pilot delivery line (23) between a pilot pump (16) and a throttle (32) and the other end side connected to the pilot delivery line (23) between a check valve (33) and a pressure reducing valve type pilot valve (25) so as to bypass the throttle (32), a gate lock valve (27), and the check valve (33) provided in order from a pilot pump (16) is provided in the pilot delivery line (23). A lock switching valve (36) shutting down a flow of a pilot pressure oil from the pilot pump (16) through the bypass line (35) at a normal time and allowing the flow of the pilot pressure oil through the bypass line (35) when a pressure generated in the pilot delivery line (23) exceeds a predetermined pressure between the gate lock valve (27) and the check valve (33) is provided in the bypass line (35).Type: GrantFiled: December 26, 2017Date of Patent: July 14, 2020Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hitoshi Nishiguchi, Hidefumi Hiramatsu, Tsuyoshi Onozaki
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Publication number: 20190352883Abstract: A bypass line (35) having one end side connected to a pilot delivery line (23) between a pilot pump (16) and a throttle (32) and the other end side connected to the pilot delivery line (23) between a check valve (33) and a pressure reducing valve type pilot valve (25) so as to bypass the throttle (32), a gate lock valve (27), and the check valve (33) provided in order from a pilot pump (16) is provided in the pilot delivery line (23). A lock switching valve (36) shutting down a flow of a pilot pressure oil from the pilot pump (16) through the bypass line (35) at a normal time and allowing the flow of the pilot pressure oil through the bypass line (35) when a pressure generated in the pilot delivery line (23) exceeds a predetermined pressure between the gate lock valve (27) and the check valve (33) is provided in the bypass line (35).Type: ApplicationFiled: December 26, 2017Publication date: November 21, 2019Inventors: Hitoshi NISHIGUCHI, Hidefumi HIRAMATSU, Tsuyoshi ONOZAKI
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Patent number: 10233822Abstract: An expansion tank, while maintaining gas-liquid separation performance of coolant circulating through an engine cooling apparatus, can absorb pressure variations occurring with volume change of the coolant even when an excessive amount of coolant is supplied. A bulkhead 42 partitions an expansion tank 30 into separate chambers R1 to R6 that communicate with each other via a first communication hole 44 positioned lower than a FULL line. The separate chambers R4 to R6 that constitute a separate chamber group X communicate with each other via a third communication hole 45a positioned higher than the FULL line. The separate chambers R1 to R3 that constitute a separate chamber group Y communicate with each other via a fourth communication hole 45b positioned higher than the FULL line. The separate chamber R1 and the separate chamber R4 communicate with each other via a second communication hole 45c disposed at the height of the FULL line.Type: GrantFiled: January 19, 2016Date of Patent: March 19, 2019Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hitoshi Nishiguchi, Tomoyuki Saito
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Patent number: 10161101Abstract: A construction machine includes a cooling fan (10) and a shroud (11). The cooling fan (10) sends air drawn in via a radiator (30) to an engine. The shroud (11) is disposed on an outer peripheral side of the cooling fan and forms a passage for air to be drawn in via the radiator. The construction machine includes a tank (12) and a cover (14B). The tank (12) is disposed superior to an upper end portion of the radiator and stores cooling water to be supplied to the radiator and the engine. The cover (14B) is disposed openably in an opening (14A) formed in a top surface plate (11B) of the shroud. The tank (12) is disposed at a position adjacent to the shroud (11) on a side closer to the engine side than the cover (14B) is.Type: GrantFiled: August 31, 2015Date of Patent: December 25, 2018Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hitoshi Nishiguchi, Toshihiro Abe, Tetsuya Matsumoto
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Publication number: 20170275846Abstract: A construction machine includes a cooling fan (10) and a shroud (11). The cooling fan (10) sends air drawn in via a radiator (30) to an engine. The shroud (11) is disposed on an outer peripheral side of the cooling fan and forms a passage for air to be drawn in via the radiator. The construction machine includes a tank (12) and a cover (14B). The tank (12) is disposed superior to an upper end portion of the radiator and stores cooling water to be supplied to the radiator and the engine. The cover (14B) is disposed openably in an opening (14A) formed in a top surface plate (11B) of the shroud. The tank (12) is disposed at a position adjacent to the shroud (11) on a side closer to the engine side than the cover (14B) is.Type: ApplicationFiled: August 31, 2015Publication date: September 28, 2017Inventors: Hitoshi NISHIGUCHI, Toshihiro ABE, Tetsuya MATSUMOTO
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Publication number: 20160222869Abstract: An expansion tank, while maintaining gas-liquid separation performance of coolant circulating through an engine cooling apparatus, can absorb pressure variations occurring with volume change of the coolant even when an excessive amount of coolant is supplied. A bulkhead 42 partitions an expansion tank 30 into separate chambers R1 to R6 that communicate with each other via a first communication hole 44 positioned lower than a FULL line. The separate chambers R4 to R6 that constitute a separate chamber group X communicate with each other via a third communication hole 45a positioned higher than the FULL line. The separate chambers R1 to R3 that constitute a separate chamber group Y communicate with each other via a fourth communication hole 45b positioned higher than the FULL line. The separate chamber R1 and the separate chamber R4 communicate with each other via a second communication hole 45c disposed at the height of the FULL line.Type: ApplicationFiled: January 19, 2016Publication date: August 4, 2016Inventors: Hitoshi NISHIGUCHI, Tomoyuki SAITO
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Patent number: 7657012Abstract: A telephone terminal is connected to a communication network that transmits voice packets and connected to a terminal control unit. The telephone terminal includes a display, an input buffer, an acquisition unit, and a controller. The input buffer temporarily stores text display information that represents an operational state of the telephone terminal, the text display information being transmitted from the terminal control unit via the communication network. The acquisition unit acquires display control information required for dividing the text display information into a plurality of pieces of component information. The controller reads the text display information stored in the input buffer, divides the text display information into a plurality of pieces of component information based on the display control information, and controls the display to display the component information pieces in different display positions.Type: GrantFiled: June 30, 2005Date of Patent: February 2, 2010Assignee: Kabushiki Kaisha ToshibaInventor: Hitoshi Nishiguchi
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Publication number: 20060002528Abstract: A telephone terminal is connected to a communication network that transmits voice packets and connected to a terminal control unit. The telephone terminal includes a display, an input buffer, an acquisition unit, and a controller. The input buffer temporarily stores text display information that represents an operational state of the telephone terminal, the text display information being transmitted from the terminal control unit via the communication network. The acquisition unit acquires display control information required for dividing the text display information into a plurality of pieces of component information. The controller reads the text display information stored in the input buffer, divides the text display information into a plurality of pieces of component information based on the display control information, and controls the display to display the component information pieces in different display positions.Type: ApplicationFiled: June 30, 2005Publication date: January 5, 2006Inventor: Hitoshi Nishiguchi