Patents by Inventor Toshiharu Sawada
Toshiharu Sawada 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: 11542880Abstract: A two-stroke engine (4) has a throttle motor (22) for driving a throttle valve (20), a fuel injection device (430) disposed in an intake system (18) including a crank chamber (420), and a control unit (24) controlling the throttle motor (22) and the fuel injection device. The two-stroke engine (4) is designed to achieve an engine rotation speed of 4,500 rpm to 7,000 rpm when the throttle valve (20) is fully open. The two-stroke engine (4) is operated with the throttle full open by the control unit (24), and a battery (8) is charged with electric power generated by a generator (6) using the two-stroke engine.Type: GrantFiled: January 7, 2022Date of Patent: January 3, 2023Assignee: YAMABIKO CORPORATIONInventors: Kuniyoshi Eto, Masanori Noguchi, Toshiharu Sawada, Masaru Nozawa, Yuta Kobayashi
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Publication number: 20220220913Abstract: A two-stroke engine (4) has a throttle motor (22) for driving a throttle valve (20), a fuel injection device (430) disposed in an intake system (18) including a crank chamber (420), and a control unit (24) controlling the throttle motor (22) and the fuel injection device. The two-stroke engine (4) is designed to achieve an engine rotation speed of 4,500 rpm to 7,000 rpm when the throttle valve (20) is fully open. The two-stroke engine (4) is operated with the throttle full open by the control unit (24), and a battery (8) is charged with electric power generated by a generator (6) using the two-stroke engine.Type: ApplicationFiled: January 7, 2022Publication date: July 14, 2022Applicant: YAMABIKO CORPORATIONInventors: Kuniyoshi ETO, Masanori NOGUCHI, Toshiharu SAWADA, Masaru NOZAWA, Yuta KOBAYASHI
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Patent number: 10746725Abstract: Endotoxin is detected by electrochemical measurement. A detection device 15 of endotoxin detects endotoxin contained in a fluid to be tested (for example, a dialysate) specifically in the following manner. First, the fluid to be tested is brought into contact with an adsorbent 17 that adsorbs endotoxin to cause the adsorbent 17 to adsorb the endotoxin. Then, a basic solution is brought into contact with the adsorbent 17 to desorb the endotoxin. Electrochemical measurement of the basic solution containing the desorbed endotoxin is performed. The endotoxin can be detected by the electrochemical measurement with high sensitivity at low cost.Type: GrantFiled: June 27, 2018Date of Patent: August 18, 2020Assignees: SHINSHU UNIVERSITY, KAIJO CORPORATION, SHIBUYA CORPORATIONInventors: Jiye Jin, Nobuyuki Kurashina, Junichiro Soejima, Toshiharu Sawada
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Patent number: 10247165Abstract: A handheld engine-driven working machine comprises an internal combustion engine with a throttle valve, a throttle adjusting device for adjusting an opening degree of the throttle valve of the internal combustion engine, and a control device provided in the internal combustion engine. The control device is configured to detect a rotational speed and an amount of change in the rotational speed at every at least one rotation of the internal combustion engine. The control device determines that the throttle valve is partially opened when the amount of change in the rotational speed is greater than a predetermined value.Type: GrantFiled: April 12, 2017Date of Patent: April 2, 2019Assignee: YAMABIKO CORPORATIONInventors: Kuniyoshi Eto, Toshiharu Sawada
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Publication number: 20190011430Abstract: Endotoxin is detected by electrochemical measurement. A detection device 15 of endotoxin detects endotoxin contained in a fluid to be tested (for example, a dialysate) specifically in the following manner. First, the fluid to be tested is brought into contact with an adsorbent 17 that adsorbs endotoxin to cause the adsorbent 17 to adsorb the endotoxin. Then, a basic solution is brought into contact with the adsorbent 17 to desorb the endotoxin. Electrochemical measurement of the basic solution containing the desorbed endotoxin is performed. The endotoxin can be detected by the electrochemical measurement with high sensitivity at low cost.Type: ApplicationFiled: June 27, 2018Publication date: January 10, 2019Inventors: Jiye JIN, Nobuyuki KURASHINA, Junichiro SOEJIMA, Toshiharu SAWADA
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Publication number: 20170292490Abstract: A handheld engine-driven working machine comprises an internal combustion engine with a throttle valve, a throttle adjusting device for adjusting an opening degree of the throttle valve of the internal combustion engine, and a control device provided in the internal combustion engine. The control device is configured to detect a rotational speed and an amount of change in the rotational speed at every at least one rotation of the internal combustion engine. The control device determines that the throttle valve is partially opened when the amount of change in the rotational speed is greater than a predetermined value.Type: ApplicationFiled: April 12, 2017Publication date: October 12, 2017Inventors: Kuniyoshi ETO, Toshiharu SAWADA
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Patent number: 9205247Abstract: A connection port 31 includes a cylindrical outer port 42 to which downstream piping 30b (discharge-side piping) is connected; an inner port 43 to which upstream piping 30a (supply-side piping) is connected, and which is provided in the outer port; and a lid member 44 which closes the inner port as well as the outer port. The inner port is provided so as to extend through the outer port from the outside of the outer port, and a heater H is provided on a portion of the inner port projecting outside the outer port. When the lid member is in a closed state, the inner port is heated with the heater to sterilize the portion of the inner port exposed to the outside, thus enabling the connection port to be cleaned at a higher level.Type: GrantFiled: June 13, 2013Date of Patent: December 8, 2015Assignees: NIPRO CORPORATION, SHIBUYA KOGYO CO., LTD.Inventors: Mitsutaka Ueda, Toshiharu Sawada, Inobu Fujikawa
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Publication number: 20150151104Abstract: A connection port 31 includes a cylindrical outer port 42 to which downstream piping 30b (discharge-side piping) is connected; an inner port 43 to which upstream piping 30a (supply-side piping) is connected, and which is provided in the outer port; and a lid member 44 which closes the inner port as well as the outer port. The inner port is provided so as to extend through the outer port from the outside of the outer port, and a heater H is provided on a portion of the inner port projecting outside the outer port. When the lid member is in a closed state, the inner port is heated with the heater to sterilize the portion of the inner port exposed to the outside, thus enabling the connection port to be cleaned at higher level.Type: ApplicationFiled: June 13, 2013Publication date: June 4, 2015Inventors: Mitsutaka Ueda, Toshiharu Sawada, Inobu Fujikawa
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Patent number: 7622043Abstract: In cleaning the dialysis device, first, the concentrate passage is disconnected from the dialysis solution concentrate container and is connected to the branched passage, and a pre-cleaning process is performed in which the fluid circuit is replace with the purified water, and determining means (4a) of a control device (4) determines that the fluid circulating in the fluid circuit is not the dialysis solution by using a conductivity meter (29), and also determines that gas is not contained in the fluid circuit by using a downward movement detecting sensor 34b in a deaeration tank, and then a main cleaning process is performed by using a cleaning solution. Incomplete cleaning due to incomplete connection can be prevented.Type: GrantFiled: April 24, 2007Date of Patent: November 24, 2009Assignee: Shibuya Kogyo Co., Ltd.Inventors: Toshiharu Sawada, Takashi Mishima
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Publication number: 20080041787Abstract: A dialysis device 1 includes a fluid circuit 2 including a water supply passage 12 for supplying purified water to a measuring chamber 11, concentrate passages 13A and 13B which join the purified water passage and are connected to dialysis solution concentrate containers 20A and 20B respectively, a branched passage 14 branched from the purified water passage, cleaning solution passage 15 for circulating a cleaning solution through the branched passage, a conductivity meter 29 as a dialysis solution detector, and a deaeration tank 34 as a gas detector.Type: ApplicationFiled: April 24, 2007Publication date: February 21, 2008Inventors: Toshiharu Sawada, Takashi Mishima
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Patent number: 6647713Abstract: A stratified scavenging two-cycle engine with catalyst capable of meeting such a requirement that a THC exhaust rate is 54 [g/kW·h] or less with use of catalyst. For this purpose, in the stratified scavenging two-cycle engine in which an air feed volume ratio R of an air feed volume (qa) flowing through the air feed passage (24) to a mixture feed volume (Qf) flowing through the mixture feed passage (20) is within a range of 0.7≦R≦1.4 during an intake stroke in which the crank chamber (8) becomes negative pressure, oxidation catalyst (47) is placed midway in an exhaust passage in a downstream of an exhaust hole (14).Type: GrantFiled: July 15, 2002Date of Patent: November 18, 2003Assignee: Komatsu Zenoah Co.Inventors: Yasutsune Miyajiri, Toshiharu Sawada
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Patent number: 6474311Abstract: A fuel tank for an engine capable of preventing the temperature of the fuel tank from rising and grass from entering a cooling fan, and being low in production cost with a simple structure is provided. To this end, in the fuel tank for an engine installed on a crankcase (2) of an engine (1) and having a face opposing a muffler (7), a heat insulating part (22) integrally formed is provided on the face opposing the muffler (7). Further, a stand part (25) integrally formed is provided.Type: GrantFiled: April 30, 2001Date of Patent: November 5, 2002Assignee: Komatsu Zenoah Co.Inventors: Toshiharu Sawada, Hiroshi Kato, Takeshi Watanabe
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Patent number: 6298811Abstract: A stratified scavenging two-cycle engine, whose simple configuration can satisfy the regulation of emission rate of THC in exhaust gas, includes: a cylinder block (4), housing a piston (1) so as to be vertically slidable and having an exhaust port (14) and a scavenging port (16) in a sidewall; a scavenging flow passage (22), for connection between a crank chamber (8) and the scavenging port (16); an air supply flow passage (24), connected to the scavenging flow passage (22) and supplying air through a check valve (26); and a mixture supply flow passage (20), for supplying mixture to the crank chamber (8). The supply quantity ratio R=qa/Qf, which is the ratio of a supply quantity qa of air flowing through the air supply flow passage (24) to a supply quantity Qf of mixture flowing through the mixture supply flow passage (20) during a suction stroke in which pressure in the crank chamber (8) is negative, is in the range of 0.7≦R≦1.4.Type: GrantFiled: February 16, 1999Date of Patent: October 9, 2001Assignees: Komatsu Zenoah Co., Petroleum Energy CenterInventors: Toshiharu Sawada, Masanori Noguchi, Buhei Kobayashi
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Patent number: 6152093Abstract: A stratified scavenging two-cycle engine, having excellent scavenging performance and a simple structure which can be manufactured at low cost, includes a cast cylinder block (2, 2a) containing a cylinder chamber (9) and two scavenging ports (14, 14, 14a, 14a), which are provided in opposite portions of the interior wall surface of the cylinder chamber (9). Each scavenging port (14, 14a) and the crank chamber (7) are connected via a scavenging flow passage (20) which includes a generally horizontally extending scavenging flow passage segment (22, 22a) and a generally vertically extending scavenging flow passage segment (21). Two recesses (23, 23, 23a, 23a) are provided in the outer surface of the cylinder block (2, 2a) with each recess being an outwardly directed extension of a respective horizontally extending scavenging flow passage segment. An air supply flow passage member (30, 30a) is attached to the cylinder block to cover a respective recess.Type: GrantFiled: February 16, 1999Date of Patent: November 28, 2000Assignee: Komatsu Zenoah Co.Inventors: Toshiharu Sawada, Hiroshi Kato, Takeshi Watanabe
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Patent number: 6112708Abstract: A stratified scavenging two-cycle engine, which enables a reduction in size and an improvement in productivity, includes a carburetor (6), which is provided between an air cleaner (7) and a suction fitting (4), wherein a mixture flow passage (6B) and an air flow passage (6A) are formed in the carburetor at least generally in parallel with each other, an air control valve (6a) is disposed in the air flow passage in the carburetor, and a mixture control valve (6b) is disposed in the mixture flow passage in the carburetor so that the carburetor and the valves (6a and 6b) constitute a single unit.Type: GrantFiled: February 22, 1999Date of Patent: September 5, 2000Assignee: Komatsu Zenoah Co.Inventors: Toshiharu Sawada, Hiroshi Kato, Takeshi Watanabe
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Patent number: 4759128Abstract: A transmission device adopted for a working tool such as a weed cutter having an engine, a rotary blade, and a gear case for supporting the rotary blade. The transmission device comprises an operation pipe for connecting the engine with the gear case, a transmission shaft disposed inside the operation pipe to transmit the torque of the engine to the rotary blade, and a bearing pipe interposed between the operation pipe and the transmission shaft. The inner surface of the bearing pipe contacts with the outer surface of the transmission shaft to support the transmission shaft rotatably. A plurality of grooves are formed circumferentially on the inner surface of the bearing pipe with predetermined intervals to reduce the contacting area thereof with respect to the transmission shaft. The transmission device further comprises a vibration isolator which is fixed to an end of the operation pipe and removably engaged with a clutch housing of the engine.Type: GrantFiled: February 9, 1987Date of Patent: July 26, 1988Assignee: Komatsu Zenoah Co.Inventors: Hiroshi Katoh, Toshio Akashi, Toshiharu Sawada, Takanori Ebunuma
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Patent number: 4658778Abstract: There is provided a piggyback type blower unit. The blower unit comprises a piggyback frame, a fan case incorporating a fan, a powder tank arranged on top of the fan case, a fuel tank arranged behind said fan case, and an engine fixed behind the fan case and on top of the fuel tank. The piggyback frame comprises hollow frame members and is connected to the suction side of the engine to form a suction path for sucking and supplying air for the engine through the suction path, or connected to the suction side of the fan to form a suction path for sucking and supplying air for the fan through the suction path. An air cleaner is inserted within the hollow piggyback frame on the suction path communicating with the suction side of the engine.Type: GrantFiled: October 10, 1985Date of Patent: April 21, 1987Assignee: Komatsu Zenoah Co.Inventors: Akira Gamoh, Takashi Miura, Toshiharu Sawada, Katsumi Kiyooka
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Patent number: 4634457Abstract: An air cleaner for an engine is provided according to the invention. Said air cleaner comprises openings for communicating with atmosphere provided along a peripheral portion surrounding a suction chamber communicating with a suction port of a carburetor, a filter to cover said openings, a suction path formed along the inside of said openings, a partition wall provided to separate said suction path and said suction chamber, and a communicating path to provide communication between said suction path and said suction chamber so that the suction sound of the engine is prevented by said partition wall from propagating directly to atmosphere and reduced due to interference caused when passing through the long suction path which is located inside the filter, without reducing the area of the path through which suction air passes.Type: GrantFiled: July 29, 1985Date of Patent: January 6, 1987Assignee: Kamatsu Zenoah Co.Inventors: Hiroshi Miyazaki, Toshiharu Sawada, Kazuo Nakajima
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Patent number: 4592445Abstract: There is provided a suction device for a chain saw, comprising a suction chamber communicating with a suction port of a carburetor for an engine accommodated within the chain saw, and a muffling path formed within a rear handle of the chain saw to pass through said rear handle and provide communication between the suction chamber and atmosphere so that the suction noise of said engine is prevented from propagating outside due to the interference with the internal wall of said muffling path without providing separately for the chain saw a suction muffler or an air cleaner having a suction muffling path.Type: GrantFiled: September 13, 1985Date of Patent: June 3, 1986Assignee: Komatsu Zenoah Co.Inventor: Toshiharu Sawada