The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2021
Filed:
Feb. 06, 2019
Tsubakimoto Chain Co., Osaka, JP;
Masanori Watanabe, Osaka, JP;
Yuji Kurematsu, Osaka, JP;
TSUBAKIMOTO CHAIN CO., Osaka, JP;
Abstract
To provide a chain tensioner that enables a reduction in the number of parts to be machined, the number of assembling steps, and a reduction in the amount of oil flowing outside, without having to increase the size of the chain tensioner. An inner sleeve, which includes a check valve unit on the side of an oil pressure chamber and a pressure adjusting unit on the outer circumference thereof, is disposed inside a plunger. The inner sleeve includes a base part, a sliding cylindrical part, and a movement restricting part. The pressure adjusting unit includes an annular relief valve that is slidably fitted on the sliding cylindrical part and that makes sliding contact with an inner surface of the plunger, and a relief spring that biases the relief valve toward the movement restricting part. The sliding cylindrical part has a relief hole that communicates with the space inside.