Hose clamp with tightener

A hose clamp comprising:

• a metallic tightening strap;
• a tightener means including a housing having a bottom portion to which a terminal portion of the tightening strap is fastened, and a rotatably mounted tightening worm gear means cooperable with a gear tooth system of the tightening strap for enabling an adjustment of the tightening strap;
• a bent part provided in a terminal portion of the tightening strap for enabling a fastening of the tightening strap to the bottom of the housing in a tension-proof manner;
• a transverse slit including a pair of longitudinal walls provided in a bottom portion of the housing extending substantially at a right angle to the tightening strap for accommodating the bent part, said transverse slit having a width slightly larger than a thickness of the tightening strap;
• wherein the bent part forms a cross bar adapted to be pressed onto one longitudinal wall of the transverse slit by a tension applied to the tightening strap, the bent part is formed by two approximately rectangular bends spaced from each other at a distance corresponding approximately to a height of the transverse slit;
• and
• wherein said longitudinal walls of the transverse slit extend substantially at a right angle to the tightening strap, said longitudinal walls having the same height and being arranged at the same level, so that said longitudinal walls are not staggered heightwise with respect to each other.