Patents by Inventor Tadafumi Hirose
Tadafumi Hirose 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: 11377991Abstract: A lightweight and compact muffler device that can be installed in a limited space in an inside of a generator. A top cover and an undercover (end cover) provided on a top and a bottom of a vertically disposed casing are each formed in substantially trapezoidal shape. Thereby, an inner capacity of the casing can be secured to be large, as a result of which, a size of the muffler device can be made compact, and no extra component is required, so that reduction in manufacturing cost and reduction in weight can be achieved. Since the casing is disposed vertically, it is possible to install the casing even when an installation space is small in an inside of a housing of a generator, and it is possible to make the generator compact.Type: GrantFiled: August 3, 2018Date of Patent: July 5, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Hiroko Murakami, Tadafumi Hirose
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Publication number: 20210199034Abstract: A lightweight and compact muffler device that can be installed in a limited space in an inside of a generator. A top cover and an undercover (end cover) provided on a top and a bottom of a vertically disposed casing are each formed in substantially trapezoidal shape. Thereby, an inner capacity of the casing can be secured to be large, as a result of which, a size of the muffler device can be made compact, and no extra component is required, so that reduction in manufacturing cost and reduction in weight can be achieved. Since the casing is disposed vertically, it is possible to install the casing even when an installation space is small in an inside of a housing of a generator, and it is possible to make the generator compact.Type: ApplicationFiled: August 3, 2018Publication date: July 1, 2021Inventors: Hiroko Murakami, Tadafumi Hirose
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Patent number: 8328207Abstract: An engine generator movable on left and right wheels. The wheels are provided on a rear section of a bottom cover via an axle. A cylinder of an engine is disposed so as to incline upwards towards the direction of the axle. Inclining the cylinder lowers the center of gravity of the engine and disposes the axle positioned below the cylinder at a high position, thereby reducing the height of the engine generator. The orientation of the engine generator during travel is stabilized.Type: GrantFiled: June 24, 2009Date of Patent: December 11, 2012Assignee: Honda Motor Co., Ltd.Inventors: Tadafumi Hirose, Masanori Shin, Makoto Uchimi, Takayuki Aoki
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Patent number: 8210133Abstract: Engine cooling structure directs cooling air, introduced into a case by operation of a fan, to a cylinder block of an engine and then discharges the cooling air out of the case through an outlet port along meandering flow passages. Case cooling structure directs cooling along the inner surface of the case. Further cooling flow passage directs the air to vertically-oriented heat radiating fins so that the cooling air flows upward along the fins and then is discharged through the outlet port. Metal cooling-fan cover is supported by the lower cover via mounting members, and a resin-made cover guide is fastened to the engine together with supporting portions and interposed between the fan cover and the engine.Type: GrantFiled: June 16, 2009Date of Patent: July 3, 2012Assignee: Honda Motor Co., Ltd.Inventors: Tadafumi Hirose, Hitoshi Yuki, Takayuki Aoki, Ryosuke Shibata, Hiroki Iikura, Makoto Uchimi, Masashi Kai
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Patent number: 8178985Abstract: An engine generator having a high-rigidity rigid skeletal member. A bottom cover supports the engine/generator unit. A wall-shaped vertical frame is disposed transversely of the engine generator in a front section of the bottom cover and rising from the bottom cover front section. A T-shaped center frame extends between a rear section of the bottom cover and the vertical frame. The skeletal member includes the bottom cover, the vertical frame and the center frame.Type: GrantFiled: June 18, 2009Date of Patent: May 15, 2012Assignee: Honda Motor Co., Ltd.Inventors: Tadafumi Hirose, Junji Hiranuma, Masanori Shin, Hitoshi Yuki, Masashi Kai
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Patent number: 8066788Abstract: An engine generator including an engine, a generator and an air cleaner inside a case is disclosed. A wall section of the case is dented in the internal direction of the case to provide a filter accommodation section with a space for accommodating a filter. The space has an opening that opens toward the exterior of the case. The filter accommodation section has an outside-air intake port. The opening is blocked by an air cleaner cover.Type: GrantFiled: June 16, 2009Date of Patent: November 29, 2011Assignee: Honda Motor Co., Ltd.Inventors: Takao Kobayashi, Tadafumi Hirose, Ryosuke Shibata, Go Tanaka
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Patent number: 7743739Abstract: An engine-driven generator is provided that is formed by supporting an engine (3) and a generator (4) on a frame (2), wherein the frame (2) is formed as an open periphery framework type, within this frame (2) a duct member (31) is disposed around the outer periphery of the engine (3) and the generator (4), the duct member (31) defining a series of cooling air passages (32) between itself and the engine (3) and generator (4), a cooling fan (26) is provided in the cooling air passage (32), the cooling fan (26) being driven by the engine (3), an intake box (34) having an intake opening (38) at an outer end thereof and housing an electrical component (53, 55) is connected to the upstream end of the duct member (31), and an exhaust box (68) having an exhaust opening (73) at an outer end thereof and housing an exhaust muffler (74) of the engine (3) is connected to the other end of the duct member (31). A compact engine-driven generator that enables running noise to be reduced can thereby be provided.Type: GrantFiled: July 8, 2004Date of Patent: June 29, 2010Assignee: Honda Motor Co., Ltd.Inventors: Toshifumi Kochi, Tadafumi Hirose, Ryuji Tsuru, Shouhei Kasagi, Yuji Shimada, Takeshi Maeda
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Patent number: 7705478Abstract: An engine-driven generator is formed by supporting on a frame an engine and a generator driven by the engine, wherein the frame is formed by integrally connecting via a cross member lower side sections of a pair of left and right side frames formed by bending a steel pipe into a U-shape, a control box housing and holding an electrical component is mounted on open end parts of the two side frames in order to reinforce the frame by connecting the open end parts to each other, and an assembly of the engine and generator is resiliently supported on the cross member.Type: GrantFiled: July 8, 2004Date of Patent: April 27, 2010Assignee: Honda Motor Co., Ltd.Inventors: Tadafumi Hirose, Koichi Asai
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Publication number: 20090320772Abstract: Engine cooling structure directs cooling air, introduced into a case by operation of a fan, to a cylinder block of an engine and then discharges the cooling air out of the case through an outlet port along meandering flow passages. Case cooling structure directs cooling along the inner surface of the case. Further cooling flow passage directs the air to vertically-oriented heat radiating fins so that the cooling air flows upward along the fins and then is discharged through the outlet port. Metal cooling-fan cover is supported by the lower cover via mounting members, and a resin-made cover guide is fastened to the engine together with supporting portions and interposed between the fan cover and the engine.Type: ApplicationFiled: June 16, 2009Publication date: December 31, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Tadafumi Hirose, Hitoshi Yuki, Takayuki Aoki, Ryosuke Shibata, Hiroki Iikura, Makoto Uchimi, Masashi Kai
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Publication number: 20090322046Abstract: An engine generator movable on left and right wheels. The wheels are provided on a rear section of a bottom cover via an axle. A cylinder of an engine is disposed so as to incline upwards towards the direction of the axle. Inclining the cylinder lowers the center of gravity of the engine and disposes the axle positioned below the cylinder at a high position, thereby reducing the height of the engine generator. The orientation of the engine generator during travel is stabilized.Type: ApplicationFiled: June 24, 2009Publication date: December 31, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Tadafumi Hirose, Masanori Shin, Makoto Uchimi, Takayuki Aoki
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Publication number: 20090322097Abstract: An engine generator having a high-rigidity rigid skeletal member. A bottom cover supports the engine/generator unit. A wall-shaped vertical frame is disposed transversely of the engine generator in a front section of the bottom cover and rising from the bottom cover front section. A T-shaped center frame extends between a rear section of the bottom cover and the vertical frame. The skeletal member includes the bottom cover, the vertical frame and the center frame.Type: ApplicationFiled: June 18, 2009Publication date: December 31, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Tadafumi Hirose, Junji Hiranuma, Masanori Shin, Hitoshi Yuki, Masashi Kai
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Publication number: 20090320773Abstract: Engine cooling structure directs cooling air, introduced into a case by operation of a fan, to a cylinder block of an engine and then discharges the cooling air out of the case through an outlet port along meandering flow passages. Case cooling structure directs cooling along the inner surface of the case. Further cooling flow passage directs the air to vertically-oriented heat radiating fins so that the cooling air flows upward along the fins and then is discharged through the outlet port. Metal cooling-fan cover is supported by the lower cover via mounting members, and a resin-made cover guide is fastened to the engine together with supporting portions and interposed between the fan cover and the engine.Type: ApplicationFiled: June 16, 2009Publication date: December 31, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Takao Kobayashi, Tadafumi Hirose, Ryosuke Shibata, Go Tanaka
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Patent number: 7597340Abstract: An engine-driven work machine equipped with a moving handle is provided wherein the moving handle (86) is formed from a pair of left and right handle bars (88, 88) having a handle grip (93) at the extremity, and a cross member (89) integrally connecting middle parts of the handle bars (88, 88) to each other, and the two handle bars (88, 88) are mounted in upper parts of left and right side frames (2b, 2b) of a frame (2) so that the two handle bars (88, 88) can pivot between a working position (A) in which the two handle bars (88, 88) protrude from the frame (2) and a storage position (B) in which, with the handle grip (93) facing downward, the handle bars (88, 88) in cooperation with the cross member (89) function as a bumper. When the moving handle is not used, it can be folded compactly, and equipment on the frame can thereby be protected from contact with another object by utilizing the handle.Type: GrantFiled: July 8, 2004Date of Patent: October 6, 2009Assignee: Honda Motor Co., Ltd.Inventors: Tadafumi Hirose, Shuhei Imai, Takao Kobayashi
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Patent number: 7430992Abstract: A duct member is disposed around outer peripheries of an engine and an engine-driven generator to define a continuous cooling-air passage between the duct member and the outer peripheries. A cooling fan is disposed in the cooling-air passage to generate a flow of cooling air from one end of the cooling-air passage to the other end during operation of the engine. An intake box is connected to one end of the cooling-air passage and has an air-intake port. A muffler box is connected to the other end of the cooling-air passage, has an air-discharge port, and accommodates an exhaust muffler of the engine. A sound-insulating housing is connected between the intake box and the muffler box to surround the duct member in order to insulate sound emitted from the duct member.Type: GrantFiled: July 10, 2007Date of Patent: October 7, 2008Assignee: Honda Motor Co., Ltd.Inventors: Hiroko Murakami, Tadafumi Hirose, Taiyo Onodera
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Publication number: 20080202447Abstract: An engine-driven generator is provided that is formed by supporting an engine (3) and a generator (4) on a frame (2), wherein the frame (2) is formed as an open periphery framework type, within this frame (2) a duct member (31) is disposed around the outer periphery of the engine (3) and the generator (4), the duct member (31) defining a series of cooling air passages (32) between itself and the engine (3) and generator (4), a cooling fan (26) is provided in the cooling air passage (32), the cooling fan (26) being driven by the engine (3), an intake box (34) having an intake opening (38) at an outer end thereof and housing an electrical component (53, 55) is connected to the upstream end of the duct member (31), and an exhaust box (68) having an exhaust opening (73) at an outer end thereof and housing an exhaust muffler (74) of the engine (3) is connected to the other end of the duct member (31). A compact engine-driven generator that enables running noise to be reduced can thereby be provided.Type: ApplicationFiled: July 8, 2004Publication date: August 28, 2008Inventors: Toshifumi Kochi, Tadafumi Hirose, Ryuji Tsuru, Shouhei Kasagi, Yuji Shimada, Takeshi Maeda
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Publication number: 20080048509Abstract: A duct member is disposed around outer peripheries of an engine and an engine-driven generator to define a continuous cooling-air passage between the duct member and the outer peripheries. A cooling fan is disposed in the cooling-air passage to generate a flow of cooling air from one end of the cooling-air passage to the other end during operation of the engine. An intake box is connected to one end of the cooling-air passage and has an air-intake port. A muffler box is connected to the other end of the cooling-air passage, has an air-discharge port, and accommodates an exhaust muffler of the engine. A sound-insulating housing is connected between the intake box and the muffler box to surround the duct member in order to insulate sound emitted from the duct member.Type: ApplicationFiled: July 10, 2007Publication date: February 28, 2008Inventors: Hiroko Murakami, Tadafumi Hirose, Taiyo Onodera
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Patent number: 7300322Abstract: An outboard motor is equipped with a centrifugal clutch located between the crankshaft of an engine and a rotor of an electric motor for, when the engine operates, transmitting its output to through the rotor to a propeller, and with a motor output transmission mechanism for, when the engine does not operate, transmitting the output of the motor to the crankshaft. The engine can therefore be started by the motor used to drive the propeller. As a result, there is no need to install a separate electric motor for engine starting, so that starting of the engine by electric power can be made possible with minimum increase in the size and cost of the outboard motor.Type: GrantFiled: July 22, 2005Date of Patent: November 27, 2007Assignee: Honda Motor Co., Ltd.Inventors: Hiroyuki Kitani, Kazumi Miyashita, Shigeo Terada, Tadafumi Hirose
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Publication number: 20070176426Abstract: An engine-driven work machine equipped with a moving handle is provided wherein the moving handle (86) is formed from a pair of left and right handle bars (88, 88) having a handle grip (93) at the extremity, and a cross member (89) integrally connecting middle parts of the handle bars (88, 88) to each other, and the two handle bars (88, 88) are mounted in upper parts of left and right side frames (2b, 2b) of a frame (2) so that the two handle bars (88, 88) can pivot between a working position (A) in which the two handle bars (88, 88) protrude from the frame (2) and a storage position (B) in which, with the handle grip (93) facing downward, the handle bars (88, 88) in cooperation with the cross member (89) function as a bumper. When the moving handle is not used, it can be folded compactly, and equipment on the frame can thereby be protected from contact with another object by utilizing the handle.Type: ApplicationFiled: July 8, 2004Publication date: August 2, 2007Inventors: Tadafumi Hirose, Shuhei Imai, Takao Kobayashi
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Publication number: 20070108767Abstract: An engine-driven generator is provided that is formed by supporting on a frame (2) an engine (3) and a generator (4) driven by the engine (3), wherein the frame is formed by integrally connecting via a cross member (7) lower side sections of a pair of left and right side frames (2b, 2b) formed by bending a steel pipe into a U-shape, a control box (34) housing and holding an electrical component (53, 55) is mounted on open end parts of the two side frames (2b, 2b) in order to reinforce the frame (2) by connecting the open end parts to each other, and an assembly of the engine (3) and generator (4) is resiliently supported on the cross member (7). The structure of the frame of the engine-driven generator can thereby be simplified, the frame can be reinforced by the control box that houses and supports the electrical component, and the frame can be made lightweight.Type: ApplicationFiled: July 8, 2004Publication date: May 17, 2007Inventors: Tadafumi Hirose, Koichi Asai
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Publication number: 20060025025Abstract: An outboard motor is equipped with a centrifugal clutch located between the crankshaft of an engine and a rotor of an electric motor for, when the engine operates, transmitting its output to through the rotor to a propeller, and with a motor output transmission mechanism for, when the engine does not operate, transmitting the output of the motor to the crankshaft. The engine can therefore be started by the motor used to drive the propeller. As a result, there is no need to install a separate electric motor for engine starting, so that starting of the engine by electric power can be made possible with minimum increase in the size and cost of the outboard motor.Type: ApplicationFiled: July 22, 2005Publication date: February 2, 2006Applicant: Honda Motor Co., Ltd.Inventors: Hiroyuki Kitani, Kazumi Miyashita, Shigeo Terada, Tadafumi Hirose