Patent ID: 8118698

Claim:
A tensioner ( 1 ) for an endless drive, in particular of an internal combustion engine, having: a base part ( 2 ) and a tensioning part ( 3 ) that is rotatable relative to the base part ( 2 ) about a common axis of rotation; a spring element ( 11 ) arranged between the base part ( 2 ) and the tensioning part ( 3 ) in a force applying manner, wherein the spring element ( 11 ) has a first end ( 35 ) and a second end ( 30 ), the first end ( 35 ) being supported by a rotary stop ( 34 ) of the base part ( 2 ) and the second end ( 30 ) being supported by a rotary stop ( 31 ) of the tensioning part ( 3 ), wherein the spring element ( 11 ) expands radially in the course of tensioning; and a friction device ( 13 ) provided between the spring element ( 11 ) and the base part ( 2 ) or the tensioning part ( 3 ), damping the relative movement between the base part ( 2 ) and the tensioning part ( 3 ), wherein the friction device ( 13 ) is arranged radially outside the spring element ( 11 ).