Patent ID: 7070528
Filing Date: 2006-07-04
Classification: F16H

Abstract:
1. A hydraulic tensioner lifter comprising: a tensioner body having an accommodation hole formed therein; a plunger fitted for sliding movement in said accommodation hole and cooperating with said tensioner body to define an oil chamber therebetween; a tensioner spring for biasing said plunger in an advancing direction; a control valve for allowing an inflow of oil pressure into said oil chamber but blocking an outflow of the oil pressure from said oil chamber; and an air-bleeder mechanism for exhausting air in said oil chamber to the outside of said oil chamber, wherein tension is applied to an endless power transmission band of a power transmission mechanism by said plunger advanced from said accommodation hole; said air-bleeder mechanism includes a purge valve having an entrance positioned at an uppermost portion of said oil chamber and having a valving element for opening and closing an exhaust path for introducing air in said oil chamber to the outside of said oil chamber, and said purge valve has a check valve function of permitting an exhaustion of the air in said oil chamber to the outside of said oil chamber but blocking admission of the air into said oil chamber from the outside of said oil chamber and blocking a discharge of the oil pressure in said oil chamber to the outside of said oil chamber, said purge valve including: