Patents by Inventor Atsushi Aoyama
Atsushi Aoyama 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: 9644480Abstract: A fluid pressure rotary machine includes a cylinder block that is fixed to a rotary shaft and includes a plurality of cylinder bores, a piston disposed to be free to slide in each cylinder bore such that a volume chamber is defined thereby, a swash plate that causes the piston to reciprocate such that the volume chamber expands and contracts, and a valve plate that slides against the cylinder block and includes an intake port and a discharge port communicating with the volume chamber. The valve plate includes a sliding surface formed to project in a spherical shape against the cylinder block. The cylinder block includes a sliding surface formed as an indentation corresponding to the shape of the sliding surface of the valve plate. A minute gap is formed between the sliding surface of the valve plate and the sliding surface of the cylinder block in an outer edge position.Type: GrantFiled: July 18, 2013Date of Patent: May 9, 2017Assignee: KYB CorporationInventors: Tetsuya Iwanaji, Atsushi Aoyama
-
Patent number: 9413275Abstract: A motor control device includes: a current detection portion provided to an inverter and detecting a current flowing to a motor due to a voltage generated across a current detection resistor, a timing measurement portion measuring a conduction pattern switching timing by the inverter and a current detection timing by the current detection portion, and a correction portion finding a correction current value using a current value detected by the current detection portion and the conduction pattern switching timing and the current detection timing measured by the timing measurement portion. The motor control device configured as above can enhance detection accuracy of a motor current.Type: GrantFiled: August 15, 2014Date of Patent: August 9, 2016Assignee: Mitsubishi Electric CorporationInventors: Atsushi Aoyama, Shinsuke Ui, Kazuyuki Adachi
-
Publication number: 20160003237Abstract: A pump discharge flow-rate control device includes a constant capacity pump driven by a common driving source with a variable capacity pump, a resistor interposed in a signal pressure passage through which a working fluid discharged from the constant capacity pump flows, and a control pressure actuator configured to lower the control pressure by driving the regulator in accordance with a rise in a differential pressure before and after the resistor. The resistor includes a fixed throttle and a check valve interposed in the signal pressure passage in parallel with each other. The check valve includes a seat interposed in the signal pressure passage, a poppet arranged on a downstream side of the seat, and a spring configured to press the poppet to the seat.Type: ApplicationFiled: March 6, 2014Publication date: January 7, 2016Inventor: Atsushi AOYAMA
-
Publication number: 20150256110Abstract: A motor control device includes: a current detection portion provided to an inverter and detecting a current flowing to a motor due to a voltage generated across a current detection resistor, a timing measurement portion measuring a conduction pattern switching timing by the inverter and a current detection timing by the current detection portion, and a correction portion finding a correction current value using a current value detected by the current detection portion and the conduction pattern switching timing and the current detection timing measured by the timing measurement portion. The motor control device configured as above can enhance detection accuracy of a motor current.Type: ApplicationFiled: August 15, 2014Publication date: September 10, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Atsushi AOYAMA, Shinsuke UI, Kazuyuki ADACHI
-
Publication number: 20140360351Abstract: A fluid pressure rotary machine includes a cylinder block that is fixed to a rotary shaft and includes a plurality of cylinder bores, a piston disposed to be free to slide in each cylinder bore such that a volume chamber is defined thereby, a swash plate that causes the piston to reciprocate such that the volume chamber expands and contracts, and a valve plate that slides against the cylinder block and includes an intake port and a discharge port communicating with the volume chamber. The valve plate includes a sliding surface formed to project in a spherical shape against the cylinder block. The cylinder block includes a sliding surface formed as an indentation corresponding to the shape of the sliding surface of the valve plate. A minute gap is formed between the sliding surface of the valve plate and the sliding surface of the cylinder block in an outer edge position.Type: ApplicationFiled: July 18, 2013Publication date: December 11, 2014Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Tetsuya Iwanaji, Atsushi Aoyama
-
Patent number: 8419381Abstract: In a tandem piston pump (1) from which pump discharge pressure from four systems is extracted, a tilt axis direction of a front swash plate (14) and a tilt axis direction of a rear swash plate (54) are different to each other, respective discharge ports (23, 24) of a rear pump (50) are opened at a phase difference relative to respective discharge ports (21, 22) of a front pump (10), and respective pump ports (41, 42) of the front pump (10) and respective pump ports (43, 44) of the rear pump (50) are opened in different side faces (71, 72) of a port block (70).Type: GrantFiled: July 31, 2007Date of Patent: April 16, 2013Assignee: Kayaba Industry Co., Ltd.Inventors: Kazumi Ito, Atsushi Aoyama
-
Patent number: 8371972Abstract: An engine unit includes a crank shaft that receives a driving force of an engine and a moving pulley that is movable in an axial direction. Keyholes are formed on an outer peripheral surface of the crank shaft. Axially extending guide holes are formed on a boss portion of the moving pulley in positions that correspond to the keyholes. Ends of keys are mounted to the keyholes. The guide holes receive therein bases of the keys to guide relative movements of the moving pulley and the crank shaft in an axial direction.Type: GrantFiled: February 8, 2008Date of Patent: February 12, 2013Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Tsuyoshi Sugitani, Mitsukazu Takebe, Atsushi Aoyama
-
Publication number: 20120316342Abstract: This invention provides a therapeutic agent for hepatitis C comprising, as an active ingredient, a compound having anti-HCV activity useful in treatment of hepatitis C. The therapeutic agent for hepatitis C comprises, as an active ingredient, a compound represented by formula (I) or a pharmaceutically acceptable salt thereof.Type: ApplicationFiled: January 31, 2011Publication date: December 13, 2012Inventors: Masanori Baba, Yuichi Hashimoto, Hiroshi Aoyama, Kazuyuki Sugita, Masahiko Nakamura, Atsushi Aoyama, Yasuo Urata
-
Patent number: 8215439Abstract: In some preferred embodiments, the dry clutch is capable of suppressing transmission of engine rotational fluctuations from the engine to a rider via a vehicle body. In the dry clutch including a driving member (clutch shoe) 66 and a driven member (clutch drum) 62 configured to be engaged with each other and disengaged from each other in a non-lubricating atmosphere to transmit/intercept the motive power of the engine to a drive wheel, a solid lubricant 70 is interposed between the driving member 66 and the driven member 62.Type: GrantFiled: July 24, 2009Date of Patent: July 10, 2012Assignee: Yamaha Hatsudoki Kabushiki KaishaInventors: Tsuyoshi Sugitani, Mitsukazu Takebe, Fumio Takeda, Atsushi Aoyama, Kotaro Katsuno
-
Patent number: 8038557Abstract: A power unit, provided in a saddle-ride type vehicle, makes a vertical dimension of an engine body compact and achieves reduction in loss horsepower. A cylinder body is formed so that a virtual plane including a cylinder axis and being in parallel to a crank axis passes through a position displaced downward from the crank axis, At least a part of an ECVT motor (electric motor for driving) and a reciprocation gear (drive member) is arranged on a side of a virtual plane, which includes a crankcase side end of the cylinder body and is perpendicular to the cylinder axis, toward the cylinder body and above a lower surface of the cylinder body.Type: GrantFiled: June 30, 2006Date of Patent: October 18, 2011Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Atsushi Aoyama
-
Publication number: 20100135827Abstract: In a tandem piston pump (1) from which pump discharge pressure from four systems is extracted, a tilt axis direction of a front swash plate (14) and a tilt axis direction of a rear swash plate (54) are different to each other, respective discharge ports (23, 24) of a rear pump (50) are opened at a phase difference relative to respective discharge ports (21, 22) of a front pump (10), and respective pump ports (41, 42) of the front pump (10) and respective pump ports (43, 44) of the rear pump (50) are opened in different side faces (71, 72) of a port block (70).Type: ApplicationFiled: July 31, 2007Publication date: June 3, 2010Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Kazumi Ito, Atsushi Aoyama
-
Publication number: 20090277710Abstract: In some preferred embodiments, the dry clutch is capable of suppressing transmission of engine rotational fluctuations from the engine to a rider via a vehicle body. In the dry clutch including a driving member (clutch shoe) 66 and a driven member (clutch drum) 62 configured to be engaged with each other and disengaged from each other in a non-lubricating atmosphere to transmit/intercept the motive power of the engine to a drive wheel, a solid lubricant 70 is interposed between the driving member 66 and the driven member 62.Type: ApplicationFiled: July 24, 2009Publication date: November 12, 2009Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Tsuyoshi SUGITANI, Mitsukazu TAKEBE, Fumio TAKEDA, Atsushi AOYAMA, Kotaro KATSUNO
-
Patent number: 7610987Abstract: A power unit in a saddle-ride type vehicle in which an arrangement space of an engine constituent part is ensured in an upper space of an engine body. In the power unit, an engine body having a crankshaft and a transmission casing accommodating therein a V-belt type transmission are joined. An oil reservoir portion is formed on a bottom of the engine body to project downward from a lower edge of the transmission casing, and a starter motor is arranged adjacent to a rear wall of the oil reservoir portion.Type: GrantFiled: June 30, 2006Date of Patent: November 3, 2009Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Atsushi Aoyama
-
Publication number: 20080190673Abstract: An engine unit includes a crank shaft that receives a driving force of an engine and a moving pulley that is movable in an axial direction. Keyholes are formed on an outer peripheral surface of the crank shaft. Axially extending guide holes are formed on a boss portion of the moving pulley in positions that correspond to the keyholes. Ends of keys are mounted to the keyholes. The guide holes receive therein bases of the keys to guide relative movements of the moving pulley and the crank shaft in an axial direction.Type: ApplicationFiled: February 8, 2008Publication date: August 14, 2008Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventors: Tsuyoshi SUGITANI, Mitsukazu TAKEBE, Atsushi AOYAMA
-
Publication number: 20070026982Abstract: A power unit, provided in a saddle-ride type vehicle, makes a vertical dimension of an engine body compact and achieves reduction in loss horsepower. A cylinder body is formed so that a virtual plane including a cylinder axis and being in parallel to a crank axis passes through a position displaced downward from the crank axis, At least a part of an ECVT motor (electric motor for driving) and a reciprocation gear (drive member) is arranged on a side of a virtual plane, which includes a crankcase side end of the cylinder body and is perpendicular to the cylinder axis, toward the cylinder body and above a lower surface of the cylinder body.Type: ApplicationFiled: June 30, 2006Publication date: February 1, 2007Inventor: Atsushi Aoyama
-
Publication number: 20070023219Abstract: A power unit in a saddle-ride type vehicle in which an arrangement space of an engine constituent part is ensured in an upper space of an engine body. In the power unit, an engine body having a crankshaft and a transmission casing accommodating therein a V-belt type transmission are joined. An oil reservoir portion is formed on a bottom of the engine body to project downward from a lower edge of the transmission casing, and a starter motor is arranged adjacent to a rear wall of the oil reservoir portion.Type: ApplicationFiled: June 30, 2006Publication date: February 1, 2007Inventor: Atsushi Aoyama
-
Patent number: 7066124Abstract: In a scooter engine having valve lifters (33) interposed between intake valves (16) and a cam shaft (31), as well as between exhaust valves (17) and a cam shaft (32), with its axial line (C) of a cylinder (7) extending toward the front part of the vehicle body, a stopper (42) is provided in the cylinder (7) in the opposite position to a top face (33a) of the valve lifters (33). The top face (33a) of the valve lifters (33) is abutted against the stopper (42) when the valve lifters (33) move to fall off a cylinder head (12) as the cam shaft is removed from the cylinder head (12), thus the valve lifters (33) are prevented from falling off the cylinder (7) by the stopper (42). In this way, the valve lifters (33) are be kept assembled to the cylinder (7) even when the cam shaft is removed during the maintenance work. In other words, the DOHC engine (2) can be installed on a scooter while preventing the valve lifters (33) from falling off in the course of maintenance work.Type: GrantFiled: June 16, 2003Date of Patent: June 27, 2006Assignee: Yamaha Hatsudoki Kabushiki KaishaInventor: Atsushi Aoyama
-
Publication number: 20050211213Abstract: In a scooter engine having valve lifters (33) interposed between intake valves (16) and a cam shaft (31), as well as between exhaust valves (17) and a cam shaft (32), with its axial line (C) of a cylinder (7) extending toward the front part of the vehicle body, a stopper (42) is provided in the cylinder (7) in the opposite position to a top face (33a) of the valve lifters (33). The top face (33a) of the valve lifters (33) is abutted against the stopper (42) when the valve lifters (33) move to fall off a cylinder head (12) as the cam shaft is removed from the cylinder head (12), thus the valve lifters (33) are prevented from falling off the cylinder (7) by the stopper (42). In this way, the valve lifters (33) are be kept assembled to the cylinder (7) even when the cam shaft is removed during the maintenance work. In other words, the DOHC engine (2) can be installed on a scooter while preventing the valve lifters (33) from falling off in the course of maintenance work.Type: ApplicationFiled: June 16, 2003Publication date: September 29, 2005Inventor: Atsushi Aoyama