Patent ID: 8292765
Filing Date: 2012-10-23
Classification: F16H

Abstract:
1. A tensioner for a belt drive comprising: a base defining an axis (A), a mobile element hinged to move about said axis (A) and including a guiding surface, an elastic element for actuating said mobile element, a pulley mounted on said mobile element about said guiding surface and rotatable about a second axis (B) offset with respect to said axis (A), a locking element for axially fastening said mobile element to said base, an annular friction element interposed between said mobile element and said locking element, a spring interposed between said friction element and one of said either the mobile element or the locking element and providing an axially directed force on said annular friction element, and a journal bearing adapted to be fed by oil to support said pulley on said guiding surface and wherein said elastic element is helical and presents a square or rectangular cross section.