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. 28, 2008
Filed:
Oct. 20, 2006
Yoshio Kurokawa, Osaka, JP;
Shigenobu Sugasawa, Osaka, JP;
Yutaka Minami, Osaka, JP;
Kaori Mori, Osaka, JP;
Timothy Marx, Westfield, MA (US);
Yoshio Kurokawa, Osaka, JP;
Shigenobu Sugasawa, Osaka, JP;
Yutaka Minami, Osaka, JP;
Kaori Mori, Osaka, JP;
Timothy Marx, Westfield, MA (US);
Tsubakimoto Chain Co., Osaka, JP;
Abstract
In a ratchet type chain tensioner, having a toothed rack on its plunger and a pawl cooperable with the rack, a recess is provided between the front end of the rack and the protruding end of the plunger. In the initial stages of operation of the tensioner, the pawl can enter the recess while permitting the plunger to protrude and retract freely within a limited range. Thereafter, when the chain controlled by the tensioner becomes elongated, the pawl cooperates with the rack to limit retraction of the plunger.