Patents by Inventor Shigeru Hirasawa
Shigeru Hirasawa 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: 20240026641Abstract: An upper revolving structure 3 of a hydraulic excavator 1 includes a heat exchanger room 12 and a pump room 13 that respectively accommodate first and second antenna devices 24, 27 removed from first and second antenna attaching tools 25, 28 in a state where antenna-side cables 26A, 29A are connected to the first and second antenna devices 24, 27, and first and second antenna retaining tools 30, 33 that are arranged inside the heat exchanger room 12 and the pump room 13 to retain the first and second antenna devices 24, 27 removed from the first and second antenna attaching tools 25, 28. A housing cover 11 is configured to cover the heat exchanger room 12 and the pump room 13 in an openable or closable manner and include a left rear side door 16 and a right side door 19 that can be locked in a state where the heat exchanger room 12 and the pump room 13 are closed.Type: ApplicationFiled: November 10, 2021Publication date: January 25, 2024Inventors: Masatoshi MORIKAWA, Shigeru HIRASAWA
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Patent number: 11739503Abstract: A hydraulic excavator is provided which makes it possible to allow an operator to surely recognize an alarm that notifies the operator of non-wearing of a seatbelt even when a work is performed in a situation in which a moving object is present around the machine. A controller outputs, when a moving object is detected and wearing of a seatbelt is detected by a seatbelt detection device, a first alarm through a notification device, outputs, when the moving object is not detected and non-wearing of the seatbelt is detected by the seatbelt detection device, a second alarm through the notification device, and outputs, when the moving object is detected and non-wearing of the seatbelt is detected by the seatbelt detection device, the second alarm preferentially over the first alarm through the notification device.Type: GrantFiled: October 11, 2019Date of Patent: August 29, 2023Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Naoki Hagiwara, Kazuhiko Mizoguchi, Shigeru Hirasawa, Keitaro Ito, Keiichirou Anahara
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Publication number: 20230038839Abstract: A left console device (11) disposed on an entrance (8A)-side of a cab (8) is provided with a gate lock device (19). The gate lock device (19) includes a gate lock lever (20) which has an operating part (20C) to be operated by an operator and is rotationally displaced between a lock position and an unlock position, and a spring member (22) which urges the gate lock lever (20) toward the lock position or the unlock position. The spring member (22) is configured to urge the gate lock lever (20) toward the unlock position when the operating part (20C) of the gate lock lever (20) is in a height position lower than an upper surface (16C) of the left console device (11) (an upper cover (16)) and urges the gate lock lever (20) toward the lock position when the operating part (20C) of the gate lock lever (20) is in a height position higher than the upper surface (16C) of the left console device (11).Type: ApplicationFiled: January 22, 2021Publication date: February 9, 2023Inventors: Shigeru HIRASAWA, Tsuyoshi KAKEGAWA, Wataru ISAKA, Takeo MANABE, Hiroyuki ISOBE
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Publication number: 20210310218Abstract: A hydraulic excavator is provided which makes it possible to allow an operator to surely recognize an alarm that notifies the operator of non-wearing of a seatbelt even when a work is performed in a situation in which a moving object is present around the machine. A controller outputs, when a moving object is detected and wearing of a seatbelt is detected by a seatbelt detection device, a first alarm through a notification device, outputs, when the moving object is not detected and non-wearing of the seatbelt is detected by the seatbelt detection device, a second alarm through the notification device, and outputs, when the moving object is detected and non-wearing of the seatbelt is detected by the seatbelt detection device, the second alarm preferentially over the first alarm through the notification device.Type: ApplicationFiled: October 11, 2019Publication date: October 7, 2021Inventors: Naoki HAGIWARA, Kazuhiko MIZOGUCHI, Shigeru HIRASAWA, Keitaro ITO, Keiichirou ANAHARA
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Patent number: 10640949Abstract: To make a reserve tank be hardly affected by the heat of an engine. An engine room (5) is totally covered by an exterior cover (9) including openings (44) at the upper surface, and includes in the inside thereof an engine (13), a radiator (24), a cooling fan (20) for sucking external air and cooling the radiator, and a reserve tank (30) for storing cooling water of the engine. The reserve tank (30) is disposed at a position above the engine (13) and facing the openings (44) and a position on the upstream side of the flow of the air with respect to the openings (44).Type: GrantFiled: March 10, 2016Date of Patent: May 5, 2020Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shigeru Hirasawa, Takeshi Hibiya, Toshikazu Kanno, Kazuhiko Mizoguchi
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Patent number: 10323557Abstract: On a revolving frame (5), a counterweight (6), an engine (7), a cooling fan (9), a heat exchanger (10), an exterior cover (14) forming a machine room (15) on the revolving frame (5), an exhaust gas purifying device (16) including a urea selective reduction catalyst (24), a urea water injection valve (26) injecting a urea water which is a reducing agent toward an upstream side of the urea selective reduction catalyst (24), and a urea water supply line (28) through which the urea water to be supplied to the urea water injection valve (26) flows are provided. A horizontal support member (34) supporting the exterior cover (14) is provided on a front side of the counterweight (6), and a heat shield cover (38) is mounted on the horizontal support member (34). A line accommodating space (41) is formed between the horizontal support member (34) and the heat shield cover (38), and a urea water supply line (28) for shielding heat from the engine (7) is accommodated in this line accommodating space (41).Type: GrantFiled: September 7, 2016Date of Patent: June 18, 2019Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hayato Kubota, Kazuhiko Mizoguchi, Hiroki Sugawara, Shigeru Hirasawa
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Publication number: 20180274423Abstract: On a revolving frame (5), a counterweight (6), an engine (7), a cooling fan (9), a heat exchanger (10), an exterior cover (14) forming a machine room (15) on the revolving frame (5), an exhaust gas purifying device (16) including a urea selective reduction catalyst (24), a urea water injection valve (26) injecting a urea water which is a reducing agent toward an upstream side of the urea selective reduction catalyst (24), and a urea water supply line (28) through which the urea water to be supplied to the urea water injection valve (26) flows are provided. A horizontal support member (34) supporting the exterior cover (14) is provided on a front side of the counterweight (6), and a heat shield cover (38) is mounted on the horizontal support member (34). A line accommodating space (41) is formed between the horizontal support member (34) and the heat shield cover (38), and a urea water supply line (28) for shielding heat from the engine (7) is accommodated in this line accommodating space (41).Type: ApplicationFiled: September 7, 2016Publication date: September 27, 2018Inventors: Hayato KUBOTA, Kazuhiko MIZOGUCHI, Hiroki SUGAWARA, Shigeru HIRASAWA
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Publication number: 20180238020Abstract: To make a reserve tank be hardly affected by the heat of an engine. An engine room (5) is totally covered by an exterior cover (9) including openings (44) at the upper surface, and includes in the inside thereof an engine (13), a radiator (24), a cooling fan (20) for sucking external air and cooling the radiator, and a reserve tank (30) for storing cooling water of the engine. The reserve tank (30) is disposed at a position above the engine (13) and facing the openings (44) and a position on the upstream side of the flow of the air with respect to the openings (44).Type: ApplicationFiled: March 10, 2016Publication date: August 23, 2018Inventors: Shigeru HIRASAWA, Takeshi HIBIYA, Toshikazu KANNO, Kazuhiko MIZOGUCHI
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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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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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Patent number: 7559601Abstract: A lower floor panel (20) and an upper floor panel (22) which is having a sunken storage portion (20D) is provided in front of a seat supporting base (12) which supports an operator's seat (16) with in a cab (11). A storage space (24) is provided between a sunken storage portion (20D) in the lower floor panel (20) and a flat horizontal surface (22A) of the upper floor panel (22). This storage space (24) can be used for installation of an air-conditioning unit (25). This lo means that the air-conditioning unit (25) can be accommodated in a floor portion in front of the operator's seat (16), permitting to suppress the height of the cab (11) to an appropriate level. In addition, installation of the air-conditioning unit (25) can make assembling and maintenance work far easier.Type: GrantFiled: February 25, 2004Date of Patent: July 14, 2009Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hajime Ishii, Masayuki Yunoue, Shigeru Hirasawa, Hiroshi Tabeta, Shogo Kimura
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Patent number: 7530418Abstract: A pattern selector valve (32) is lodged in a seat supporting stool (22) which supports an operator's seat (23) thereon, with a switch lever (32B) at a front side of the seat supporting stool. An operator can easily check out the position of the switch lever (32B) of the pattern selector valve (32) at the time of getting onto the operator's seat (23). Besides, the switch lever (32B) of the pattern selector valve (32) can be easily changed over to a different pattern position in the vicinity of the operator's seat (23). Check-out and change-over of the switch lever (32B) are facilitated and can be carried out in a secure manner under guidance of a pattern indicator (39) which is provided on a front cover (34).Type: GrantFiled: January 28, 2005Date of Patent: May 12, 2009Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hajime Ishii, Shigeru Hirasawa, Hiroshi Tabeta, Shogo Kimura
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Patent number: 7338114Abstract: A front side of a floor panel (15) is pivotally supported on a floor panel support mechanism (21), permitting tilting of the floor panel in a forward direction with respect to a revolving frame (5) by way of a tilting mechanism (30). The tilting mechanism (30) has a guide rail assembly (33) which is pivotally supported on the side of the revolving frame (5), a screw rod (34) which is rotatably supported on the guide rail assembly (33), and a displacement member (35) which is attached to the floor panel (15) and held in threaded engagement with the screw rod (34). The floor panel (15) and a cab (29) are tilted up in the forward direction upon rotationally driving the screw rod (34) to translate the displacement member (35) constituting the tilting mechanism (30).Type: GrantFiled: August 20, 2004Date of Patent: March 4, 2008Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hajime Ishii, Shogo Kimura, Teruo Irino, Hajime Yoshida, Shigeru Hirasawa
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Publication number: 20080035401Abstract: A pattern selector valve (32) is lodged in a seat supporting stool (22) which supports an operator's seat (23) thereon, with a switch lever (32B) at a front side of the seat supporting stool. An operator can easily check out the position of the switch lever (32B) of the pattern selector valve (32) at the time of getting onto the operator's seat (23). Besides, the switch lever (32B) of the pattern selector valve (32) can be easily changed over to a different pattern position in the vicinity of the operator's seat (23). Check-out and change-over of the switch lever (32B) are facilitated and can be carried out in a secure manner under guidance of a pattern indicator (39) which is provided on a front cover (34).Type: ApplicationFiled: January 28, 2005Publication date: February 14, 2008Inventors: Hajime Ishii, Shigeru Hirasawa, Hiroshi Tabeta, Shogo Kimura
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Patent number: 7287810Abstract: Right and left floor panel support mechanisms (40) and (46) are provided on a revolving frame (5) to support a front end of a floor panel (21) pivotally for permitting tilt-up and tilt-down of the floor panel (21). A tilting mechanism (54) is provided between the revolving frame (5) and the floor panel (21) for tilting the floor panel (21) together with a canopy (31). Through a plural number of vibration insulators (20), a floor panel mount plate (19) is mounted on a support member (12) which is located in a rear side portion of the revolving frame (5). A housing mount plate (24) of the floor panel (21) and a base plate (37) of the canopy (31) are detachably fixed to the floor panel mount plate (19) by the use of fastening bolts (39). After removing the fastening bolts (39), the floor panel (21) and canopy (31) can be tilted together without necessitating to disassemble the vibration insulators (20).Type: GrantFiled: October 5, 2004Date of Patent: October 30, 2007Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hajime Ishii, Shogo Kimura, Shigeru Hirasawa, Tomoyuki Tanaka, Hiroshi Tabeta
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Publication number: 20060266573Abstract: Right and left floor panel support mechanisms (40) and (46) are provided on a revolving frame (5) to support a front end of a floor panel (21) pivotally for permitting tilt-up and tilt-down of the floor panel (21). A tilting mechanism (54) is provided between the revolving frame (5) and the floor panel (21) for tilting the floor panel (21) together with a canopy (31). Through a plural number of vibration insulators (20), a floor panel mount plate (19) is mounted on a support member (12) which is located in a rear side portion of the revolving frame (5). A housing mount plate (24) of the floor panel (21) and a base plate (37) of the canopy (31) are detachably fixed to the floor panel mount plate (19) by the use of fastening bolts (39). After removing the fastening bolts (39), the floor panel (21) and canopy (31) can be tilted together without necessitating to disassemble the vibration insulators (20).Type: ApplicationFiled: October 5, 2004Publication date: November 30, 2006Inventors: Hajime Ishii, Shogo Kimura, Shigeru Hirasawa, Tomoyuki Tanaka, Hiroshi Tabeta
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Publication number: 20060254095Abstract: A front side of a floor panel (15) is pivotally supported on a floor panel support mechanism (21), permitting tilting of the floor panel in a forward direction with respect to revolving frame (5) by way of a tilting mechanism (30). The tilting mechanism (30) has a guide rail assembly (33) which is pivotally supported on the side of the revolving frame (5), a screw rod (34) which is rotatably supported on the guide rail assembly (33), and a displacement member (35) which is attached to the floor panel (15) and held in threaded engagement with the screw rod (34). The floor panel (15) and a cab (29) are tilted up in the forward direction upon rotationally driving the screw rod (34) to translate the displacement member (35) constituting the tilting mechanism (30).Type: ApplicationFiled: August 20, 2004Publication date: November 16, 2006Inventors: Hajime Ishii, Shogo Kimura, Teruo Irino, Hajime Yoshida, Shigeru Hirasawa
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Publication number: 20060170251Abstract: A lower floor panel (20) and an upper floor panel (22) which is having a sunken storage portion (20D) is provided in front of a seat supporting base (12) which supports an operator's seat (16) with in a cab (11). A storage space (24) is provided between a sunken storage portion (20D) in the lower floor panel (20) and a flat horizontal surface (22A) of the upper floor panel (22). This storage space (24) can be used for installation of an air-conditioning unit (25). This lo means that the air-conditioning unit (25) can be accommodated in a floor portion in front of the operator's seat (16), permitting to suppress the height of the cab (11) to an appropriate level. In addition, installation of the air-conditioning unit (25) can make assembling and maintenance work far easier.Type: ApplicationFiled: February 25, 2004Publication date: August 3, 2006Inventors: Hajime Ishii, Masayuki Yuoue, Shigeru Hirasawa, Hiroshi Tabeta, Shogo Kimura
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Patent number: D847213Type: GrantFiled: February 27, 2018Date of Patent: April 30, 2019Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shosei Kurosaka, Takumi Tanba, Shigeru Hirasawa, Kazuhiko Mizoguchi
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Patent number: D854054Type: GrantFiled: February 27, 2018Date of Patent: July 16, 2019Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shigeru Hirasawa, Kazuhiko Mizoguchi, Shosei Kurosaka, Takumi Tanba