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:
Nov. 17, 2020
Filed:
Jul. 25, 2018
Tsubakimoto Chain Co., Osaka, JP;
Masanori Watanabe, Osaka, JP;
Yudai Takagi, Osaka, JP;
Osamu Yoshida, Osaka, JP;
Yuji Kurematsu, Osaka, JP;
TSUBAKIMOTO CHAIN CO., Osaka, JP;
Abstract
To provide a tensioner capable of keeping, with a simple structure, oil pressure in an oil pressure chamber stable. The tensioner includes a pressure adjusting mechanism that adjusts oil pressure in the oil pressure chamber. The pressure adjusting mechanism includes a cylinder part, a piston unit set inside the cylinder part so as to be able to approach and separate from the oil pressure chamber, and piston biasing units that bias the piston unit toward the oil pressure chamber. A liquid tight seal condition is kept between the cylinder part and the piston unit at any position between a position where the piston unit has moved closest to the oil pressure chamber and a position where the piston unit has moved closest to the adjustment space. The piston biasing units include at least two piston springs.