Patent ID: 7691018

Claim:
A blade tensioner system for a chain, the system including a blade tensioner imparting tension to the chain that drivingly connects a driven shaft to a drive shaft in an engine, the blade tensioner comprising: a blade shoe having an arcuately curved chain sliding face, a proximal end portion, and a distal end portion having a pair of substantially planar tapered sides tapering inwards towards a center of the shoe joined by a bottom and arranged at an acute distal end angle; and a mating block having a channel with a pair of tapered sides joined by a bottom, for receiving the distal end portion; the sides being inclined such that the sides if extended beyond the bottom would meet at a second acute angle; wherein there is a distance between the distal end of the blade shoe and the bottom of the channel of the mating block such that when load on the chain increases, the tapered sides of the distal end portion contact and wedge with the tapered sides of the channel of the mating block, damping chain vibration and wherein when the distal end portion is further received by the channel of the mating block, resistance to further wedging is increased.