Patent ID: 7398875

Claim:
A tensioning element ( 1 ) having: a U-shaped bearing bracket ( 2 ) with a first and second surface ( 6 , 25 ) and two oppositely located bores, a first bore having a smaller diameter than an oppositely located second bore, a clamping means ( 3 ), which is mounted displaceably in the bearing bracket ( 2 ) and which comprises a clamping piece ( 4 ) interacting with the first surface ( 6 ) and a foot ( 5 ), wherein the clamping piece ( 4 ) and the foot ( 5 ) are connected together by a middle piece ( 7 ), a spring ( 8 ) having a first end which interacts with the second surface ( 25 ) and a second opposite end which interacts with the foot, whereas the middle piece ( 7 ) has a smaller diameter than the foot ( 5 ), the middle piece ( 7 ) is mounted displaceably in the first bore and the foot ( 5 ) is mounted displaceably in the second bore.