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:
Oct. 13, 2020
Filed:
Apr. 24, 2018
Tsubakimoto Chain Co., Osaka-shi, Osaka, JP;
Masanori Watanabe, Osaka, JP;
Osamu Yoshida, Osaka, JP;
TSUBAKIMOTO CHAIN CO., Osaka-shi, Osaka, JP;
Abstract
The present invention provides a chain tensioner that, while being free from an increase in its size, reduces the number of processing parts and the number of assembling steps and reduces the outflow of oil to an outside. Inside a plunger, an inner sleeve including a check valve unit provided on a side of the inner sleeve facing a pressure oil chamber and a pressure regulating unit provided on an outer periphery of the inner sleeve is arranged. The inner sleeve has a cylinder part and a movement restricting part provided on the side of the inner sleeve facing the pressure oil chamber, and the pressure regulating unit has an annular relief valve slidably fitted onto an outer surface of the cylinder part and slidably contacting on an inner surface of the plunger and a relief spring urging the relief valve to a side of the movement restricting part.