Patents by Inventor Yuji OIGAWA
Yuji OIGAWA 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: 11530638Abstract: A general-purpose engine is provided with an engine body having an exhaust system part connected to a cylinder, and also with a cooling mechanism for cooling the engine body. The cooling mechanism is provided with a cooling fan which rotates to generate a cooling air flow, a discharge section which discharges the cooling air flow generated by the rotation of the cooling fan and a cooling air flow opening which is disposed in the upper part of a partition for separating a cylinder chamber having the cylinder provided therein from a muffler chamber having a canister muffler provided therein, connects the cylinder head side of the cylinder chamber and the upper side of the muffler chamber, and causes a cooling air flow to flow from the cylinder head side of the cylinder chamber to the muffler chamber.Type: GrantFiled: March 8, 2022Date of Patent: December 20, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yuji Oigawa, Kiichi Shimamura, Sho Kitano
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Patent number: 11506148Abstract: Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween.Type: GrantFiled: July 24, 2019Date of Patent: November 22, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yuji Oigawa, Yusuke Ninomiya, Tetsuya Ogawa
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Patent number: 11499506Abstract: An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.Type: GrantFiled: March 5, 2019Date of Patent: November 15, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yusuke Ninomiya, Yuji Oigawa, Tetsuya Ogawa
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Publication number: 20220195910Abstract: A general-purpose engine is provided with an engine body having an exhaust system part connected to a cylinder, and also with a cooling mechanism for cooling the engine body. The cooling mechanism is provided with a cooling fan which rotates to generate a cooling air flow, a discharge section which discharges the cooling air flow generated by the rotation of the cooling fan and a cooling air flow opening which is disposed in the upper part of a partition for separating a cylinder chamber having the cylinder provided therein from a muffler chamber having a canister muffler provided therein, connects the cylinder head side of the cylinder chamber and the upper side of the muffler chamber, and causes a cooling air flow to flow from the cylinder head side of the cylinder chamber to the muffler chamber.Type: ApplicationFiled: March 8, 2022Publication date: June 23, 2022Inventors: Yuji OIGAWA, Kiichi SHIMAMURA, Sho KITANO
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Patent number: 11326510Abstract: Provided is a general purpose engine that has a small external appearance and can be placed in a stable posture even when inverted, and whereby labels attached to the upper surface thereof can be protected. The general purpose engine 1 comprises a shroud 4 covering an engine main body. The shroud 4 includes: a top cover 2 arranged in an upper section of the general purpose engine 1; and a bottom cover 3 arranged in a lower section of the general purpose engine 1. The top cover 2 has a pair of bridges 20, 20 formed so as to protrude from the upper surface of the top cover 2, constituting the apex of the top cover 2 and continually extending from the front surface of the top cover 2 to the rear surface thereof, across the upper surface.Type: GrantFiled: March 30, 2018Date of Patent: May 10, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yusuke Ninomiya, Yuko Akamine, Yuji Oigawa, Shohma Higano
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Patent number: 11300035Abstract: A general-purpose engine is provided with an engine body having an exhaust system part connected to a cylinder, and also with a cooling mechanism for cooling the engine body. The cooling mechanism is provided with a cooling fan which rotates to generate a cooling air flow, a discharge section which discharges the cooling air flow generated by the rotation of the cooling fan, and a cooling air flow opening which is disposed in the upper part of a partition for separating a cylinder chamber having the cylinder provided therein from a muffler chamber having a canister muffler provided therein, connects the cylinder head side of the cylinder chamber and the upper side of the muffler chamber, and causes a cooling air flow to flow from the cylinder head side of the cylinder chamber to the muffler chamber.Type: GrantFiled: August 30, 2018Date of Patent: April 12, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yuji Oigawa, Kiichi Shimamura, Sho Kitano
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Patent number: 11280262Abstract: Provided is a general purpose engine having a sufficient cooling function. The general purpose engine 1 comprises: an engine main body 10 having a canister muffler 132 on the side thereof; a cooling mechanism 9 that cools the engine main body 10; and a shroud 4 covering the engine main body 10 and the cooling mechanism 9. The cooling mechanism 9 comprises: a cooling fan 90 that generates cooling air by rotating; and a blowing unit 92 that blows cooling air generated by the rotation of the cooling fan 90, towards the upper section of the engine main body 10. A space S in which the cooling air blown from the blowing unit 92 towards the upper section of the engine main body 10 can flow vertically downwards is formed between the shroud 4 and the canister muffler 132. A return section 40 that guides the cooling air towards a stud bolt 132a that fixes the canister muffler 132 to the engine main body 10 is formed on an inside wall surface of the shroud 4 forming the space S.Type: GrantFiled: March 30, 2018Date of Patent: March 22, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Yuji Oigawa, Yusuke Ninomiya
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Patent number: 11280248Abstract: Provided is a general-purpose engine having a sufficient cooling function. A general-purpose engine 1 is provided with: an engine body 10 which has an exhaust system component 13 connected to a cylinder 11; and a cooling mechanism 9 which cools the engine body 10. The cooling mechanism 9 is provided with: a cooling fan 90 which rotates to generate a cooling air flow; a discharge section 92 which discharges the cooling air flow generated by the rotation of the cooling fan 90; and an air guide 93 which guides, toward the cylinder 11 and the exhaust system component 13, the cooling air flow discharged from the discharge section 92.Type: GrantFiled: March 30, 2018Date of Patent: March 22, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Sho Kitano, Yuji Oigawa, Kiichi Shimamura, Masanori Ishikawa, Shohma Higano
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Publication number: 20210404421Abstract: Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween.Type: ApplicationFiled: July 24, 2019Publication date: December 30, 2021Inventors: Yuji OIGAWA, Yusuke NINOMIYA, Tetsuya OGAWA
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Publication number: 20210215089Abstract: A general-purpose engine is provided with an engine body having an exhaust system part connected to a cylinder, and also with a cooling mechanism for cooling the engine body. The cooling mechanism is provided with a cooling fan which rotates to generate a cooling air flow, a discharge section which discharges the cooling air flow generated by the rotation of the cooling fan, and a cooling air flow opening which is disposed in the upper part of a partition for separating a cylinder chamber having the cylinder provided therein from a muffler chamber having a canister muffler provided therein, connects the cylinder head side of the cylinder chamber and the upper side of the muffler chamber, and causes a cooling air flow to flow from the cylinder head side of the cylinder chamber to the muffler chamber.Type: ApplicationFiled: August 30, 2018Publication date: July 15, 2021Inventors: Yuji OIGAWA, Kiichi SHIMAMURA, Sho KITANO
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Publication number: 20210140392Abstract: An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.Type: ApplicationFiled: March 5, 2019Publication date: May 13, 2021Inventors: Yusuke Ninomiya, Yuji Oigawa, Tetsuya Ogawa
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Publication number: 20210115845Abstract: Provided is a general purpose engine that has a small external appearance and can be placed in a stable posture even when inverted, and whereby labels attached to the upper surface thereof can be protected. The general purpose engine 1 comprises a shroud 4 covering an engine main body. The shroud 4 includes: a top cover 2 arranged in an upper section of the general purpose engine 1; and a bottom cover 3 arranged in a lower section of the general purpose engine 1. The top cover 2 has a pair of bridges 20, 20 formed so as to protrude from the upper surface of the top cover 2, constituting the apex of the top cover 2 and continually extending from the front surface of the top cover 2 to the rear surface thereof, across the upper surface.Type: ApplicationFiled: March 30, 2018Publication date: April 22, 2021Inventors: Yusuke NINOMIYA, Yuko AKAMINE, Yuji OIGAWA, Shohma HIGANO
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Publication number: 20210025320Abstract: Provided is a general purpose engine having a sufficient cooling function. The general purpose engine 1 comprises: an engine main body 10 having a canister muffler 132 on the side thereof; a cooling mechanism 9 that cools the engine main body 10; and a shroud 4 covering the engine main body 10 and the cooling mechanism 9. The cooling mechanism 9 comprises: a cooling fan 90 that generates cooling air by rotating; and a blowing unit 92 that blows cooling air generated by the rotation of the cooling fan 90, towards the upper section of the engine main body 10. A space S in which the cooling air blown from the blowing unit 92 towards the upper section of the engine main body 10 can flow vertically downwards is formed between the shroud 4 and the canister muffler 132. A return section 40 that guides the cooling air towards a stud bolt 132a that fixes the canister muffler 132 to the engine main body 10 is formed on an inside wall surface of the shroud 4 forming the space S.Type: ApplicationFiled: March 30, 2018Publication date: January 28, 2021Inventors: Yuji OIGAWA, Yusuke NINOMIYA
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Publication number: 20210017896Abstract: Provided is a general-purpose engine having a sufficient cooling function. A general-purpose engine 1 is provided with: an engine body 10 which has an exhaust system component 13 connected to a cylinder 11; and a cooling mechanism 9 which cools the engine body 10. The cooling mechanism 9 is provided with: a cooling fan 90 which rotates to generate a cooling air flow; a discharge section 92 which discharges the cooling air flow generated by the rotation of the cooling fan 90; and an air guide 93 which guides, toward the cylinder 11 and the exhaust system component 13, the cooling air flow discharged from the discharge section 92.Type: ApplicationFiled: March 30, 2018Publication date: January 21, 2021Inventors: Sho KITANO, Yuji OIGAWA, Kiichi SHIMAMURA, Masanori ISHIKAWA, Shohma HIGANO