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公开(公告)号：US11143100B2
公开(公告)日：2021-10-12
申请号：US16225139
申请日：2018-12-19
Applicant: TSUBAKIMOTO CHAIN CO.
Inventor： Yoshitaka Iwasaki , Masanori Watanabe , Osamu Yoshida , Yuji Kurematsu , Yuichiro Ishikawa
Abstract: To provide a tensioner that has a simple structure and is easy to assemble, and is configured to smoothly relieve pressure during oil release with reduced flow resistance so that the oil pressure in an oil pressure chamber is kept stable in a favorable manner. A relief valve unit includes a cap member that fits with a seat member to retain a stopper member inside the seat member. An external relief hole, which causes a relief-side space in a plunger hole to communicate with the outside of a plunger, opens radially in an outer circumferential surface of the plunger.
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公开(公告)号：US11231092B2
公开(公告)日：2022-01-25
申请号：US16597089
申请日：2019-10-09
Applicant: TSUBAKIMOTO CHAIN CO.
Inventor： Yoshitaka Iwasaki , Kaori Mori , Yuji Kurematsu
IPC: F16H7/18
Abstract: An object of the present invention is to provide a chain guide that eliminates the burden of assembling a guide shoe and a base member together, and prevents the guide shoe from being limited in its movement in the longitudinal guiding direction relative to the base member to improve durability. The guide shoe and the base member of the chain guide according to the invention are united by being integrally molded. The chain guide includes a fixed engaging part where the guide shoe engages with the base member such that the guide shoe is restricted from moving in the longitudinal guiding direction relative to the base member, and a movable engaging part where the guide shoe engages with the base member such that the guide shoe is slidable relative to the base member. A molding gate mark is positioned at or near the fixed engaging part.
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公开(公告)号：US20190277370A1
公开(公告)日：2019-09-12
申请号：US16294362
申请日：2019-03-06
Applicant: TSUBAKIMOTO CHAIN CO.
Inventor： Yoshitaka Iwasaki , Masanori Watanabe
Abstract: To provide a tensioner that is simply structured and easy to assemble, and that is capable of preventing plunger deformation during press-fitting of a relief valve unit, obviating the need for outside diameter grinding after the assembling, and reducing the thickness of the side walls of the plunger. A relief mechanism, which releases oil inside an oil pressure chamber to the outside of the plunger when the oil pressure in the oil pressure chamber becomes high, has a fixing member that is made of resin, that is located between the outer circumference of the relief valve unit and the inner circumference of the plunger hole, and that fixes the relief valve unit in the plunger hole on the front side thereof.
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公开(公告)号：US20190195123A1
公开(公告)日：2019-06-27
申请号：US16225139
申请日：2018-12-19
Applicant: TSUBAKIMOTO CHAIN CO.
Inventor： Yoshitaka Iwasaki , Masanori Watanabe , Osamu Yoshida , Yuji Kurematsu
CPC classification number: F02B67/06 , F16H7/0829 , F16H2007/0806 , F16H2007/0812 , F16H2007/0863
Abstract: To provide a tensioner that has a simple structure and is easy to assemble, and is configured to smoothly relieve pressure during oil release with reduced flow resistance so that the oil pressure in an oil pressure chamber is kept stable in a favorable manner. A relief valve unit includes a cap member that fits with a seat member to retain a stopper member inside the seat member. An external relief hole, which causes a relief-side space in a plunger hole to communicate with the outside of a plunger, opens radially in an outer circumferential surface of the plunger.
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