Patent ID: 8814734
Filing Date: 2014-08-26
Classification: F16H

Abstract:
1. A tensioning device for a flexible drive means, such as a chain or a belt, comprising: a housing, a tensioning piston movably arranged in the housing and provided with a hollow space, a pressure chamber for hydraulic fluid formed between the housing and the tensioning piston, a vent opening disposed in the tensioning piston, a damping means in flow communication on the one hand with the vent opening and on the other hand with the pressure chamber, and a packing element arranged in the hollow space of the tensioning piston which is at least a component of the damping means, such that the damping means comprises a capacity for hydraulic fluid which corresponds to at least 30% of the volume of the pressure chamber added with a 1 mm stroke of the tensioning piston in the extension direction.