Patent ID: 8257212
Filing Date: 2012-09-04
Classification: F16H

Abstract:
1. A chain tensioner having a plunger slidably fitted in a bottomed cylinder formed in a housing, and configured to resiliently urge the plunger by a spring in the direction along which the plunger is projected out from the cylinder, the chain tensioner being configured to attach an engagement clip to the opening of the cylinder, and to provide an engagement portion engageable with the engagement clip to the end of the plunger on the projection side thereof, so as to allow the engagement clip and the engagement portion to engage with and disengage from each other corresponding to the position of rotation of the plunger, wherein the plunger has a ratchet formed on the outer circumferential surface thereof in the longitudinal direction, so as to allow the engagement clip, released from the engagement portion as the plunger rotates, to engage with the ratchet.