Patents by Inventor Seigo Ohsawa
Seigo Ohsawa 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: 11940047Abstract: To provide a simple-structured chain guide assembly frame capable of reliably maintaining a correct positional relationship between a driven sprocket and a sprocket holding portion without the possibility of driven sprocket detachment. The chain guide assembly frame includes a main body having a fixed-guide-side sprocket holding portion and a pivoting-guide-side sprocket holding portion. The fixed-guide-side sprocket holding portion includes a first fixed-guide-side support portion that supports a driven sprocket at a first contact point, and a second fixed-guide-side support portion that supports the driven sprocket at a second contact point located more outside than the first contact point. When the driven sprocket is in an erected state in which the driven sprocket is supported at the first contact point and second contact point, the vector of gravity acting on the gravity center of the driven sprocket points between the first contact point and second contact point.Type: GrantFiled: December 13, 2022Date of Patent: March 26, 2024Assignee: TSUBAKIMOTO CHAIN CO.Inventors: Volkmar Nyga, Seigo Ohsawa, Sung-Hwan Lim, Munehiro Maeda, Yuji Oshima
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Patent number: 11933400Abstract: To provide a chain guide assembly frame capable of efficiently collecting the oil that adhered to various parts of the chain guide assembly, and guiding the collected oil to predetermined locations, to allow efficient use of oil, with a simple structure. The chain guide assembly frame includes driven sprocket holding portions, a fixed chain guide, and a pivoting chain guide holding portion on a main body. A drive sprocket holding portion is provided at a position lower than the driven sprocket holding portions. The main body includes a concave and/or convex oil passage that extends from an upper part toward a lower part to guide the oil toward above the drive sprocket holding portion.Type: GrantFiled: December 13, 2022Date of Patent: March 19, 2024Assignee: TSUBAKIMOTO CHAIN CO.Inventors: Volkmar Nyga, Seigo Ohsawa, Sung-Hwan Lim, Munehiro Maeda, Yuji Oshima
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Publication number: 20240068547Abstract: To provide a simple-structured chain tensioner that reduces the burden of work required for assembling and maintenance, sufficiently damps the motion of the plunger, and helps reduce machining costs and size increases of the plunger and tensioner body. The chain tensioner includes a tensioner body with a plunger bore, a plunger, and a biasing member that biases the plunger. The plunger has raised portions with which a locking member engages. The plunger bore is provided with a locking member holding part on one side that is open. The locking member holding part is provided with an inclined surface at one end in the plunger entry direction, the inclined surface becoming progressively shallower in the plunger entry direction. The locking member can deform elastically in a cross section when engaging with the raised portion of the plunger.Type: ApplicationFiled: August 10, 2023Publication date: February 29, 2024Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Seigo Ohsawa, Taiki Sekiguchi
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Publication number: 20230304565Abstract: To provide a chain guide, chain drive device, and transmission system, with which an amount of lubricating oil supplied to guide surfaces is increased. The chain guide includes an upper additional extension formed to extend from an upper end of a sliding guide part in the guide longitudinal direction and having an oil-recovery guide surface positioned opposite and spaced from the chain.Type: ApplicationFiled: March 21, 2023Publication date: September 28, 2023Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Sung-Hwan LIM, Munehiro MAEDA, Seigo OHSAWA, Yuji OSHIMA
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Patent number: 11732785Abstract: An object of the present invention is to provide a chain guide mechanism that can readily integrate all the components in a simple structure and enhance work efficiency during assembly or maintenance. The chain guide mechanism of the present invention is configured to be able to integrally support, on a frame, components including a plurality of sprockets, a chain, a fixed chain guide, and a pivoting chain guide. The frame includes a pivoting chain guide holding part that holds a mounting boss of the pivoting chain guide in a state of a loose fit. The pivoting chain guide holding part is configured to allow the mounting boss to be fitted therethrough from one side.Type: GrantFiled: November 5, 2021Date of Patent: August 22, 2023Assignee: TSUBAKIMOTO CHAIN CO.Inventors: Volkmar Nyga, Seigo Ohsawa, Munehiro Maeda, Yuji Oshima
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Publication number: 20230193795Abstract: To provide a chain guide assembly frame capable of efficiently collecting the oil that adhered to various parts of the chain guide assembly, and guiding the collected oil to predetermined locations, to allow efficient use of oil, with a simple structure. The chain guide assembly frame includes driven sprocket holding portions, a fixed chain guide, and a pivoting chain guide holding portion on a main body. A drive sprocket holding portion is provided at a position lower than the driven sprocket holding portions. The main body includes a concave and/or convex oil passage that extends from an upper part toward a lower part to guide the oil toward above the drive sprocket holding portion.Type: ApplicationFiled: December 13, 2022Publication date: June 22, 2023Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Volkmar Nyga, Seigo Ohsawa, Sung-Hwan Lim, Munehiro Maeda, Yuji Oshima
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Publication number: 20230184311Abstract: To provide a simple-structured chain guide assembly frame capable of reliably maintaining a correct positional relationship between a driven sprocket and a sprocket holding portion without the possibility of driven sprocket detachment. The chain guide assembly frame includes a main body having a fixed-guide-side sprocket holding portion and a pivoting-guide-side sprocket holding portion. The fixed-guide-side sprocket holding portion includes a first fixed-guide-side support portion that supports a driven sprocket at a first contact point, and a second fixed-guide-side support portion that supports the driven sprocket at a second contact point located more outside than the first contact point. When the driven sprocket is in an erected state in which the driven sprocket is supported at the first contact point and second contact point, the vector of gravity acting on the gravity center of the driven sprocket points between the first contact point and second contact point.Type: ApplicationFiled: December 13, 2022Publication date: June 15, 2023Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Volkmar Nyga, Seigo Ohsawa, Sung-Hwan Lim, Munehiro Maeda, Yuji Oshima
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Publication number: 20220228649Abstract: An object of the present invention is to provide a chain guide mechanism that can readily integrate all the components in a simple structure and enhance work efficiency during assembly or maintenance. The chain guide mechanism of the present invention is configured to be able to integrally support, on a frame, components including a plurality of sprockets, a chain, a fixed chain guide, and a pivoting chain guide. The frame includes a pivoting chain guide holding part that holds a mounting boss of the pivoting chain guide in a state of a loose fit. The pivoting chain guide holding part is configured to allow the mounting boss to be fitted therethrough from one side.Type: ApplicationFiled: November 5, 2021Publication date: July 21, 2022Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Volkmar Nyga, Seigo Ohsawa, Munehiro Maeda, Yuji Oshima
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Publication number: 20100304906Abstract: In a roller chain or rollerless bushing chain for transmission of power, hollow connecting pins are swaged to the plates of the outer links. Each pin has at least one oil conducting passage extending from its hollow interior to its exterior whereby lubricating oil can flow through the pin from the ends thereof and into the clearance between the pin and its surrounding bushing.Type: ApplicationFiled: April 30, 2010Publication date: December 2, 2010Applicant: Tsubakimoto Chain Co., Nakanoshima Mitsui Bldg.Inventors: Seigo Ohsawa, Arimasa Kaga
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Publication number: 20100137088Abstract: The invention provides a transmission chain including inner plates, bushings, outer plates, and a cylindrical hollow pin capable of supplying lubricant oil on a outer circumference of the pin across the whole area of the longitudinal direction of the pin when a chain is in operation, even when the chain is tensioned.Type: ApplicationFiled: November 13, 2009Publication date: June 3, 2010Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Seigo Ohsawa, Arimasa Kaga