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US 4,973,290 AGranted
Automatic tensioning device
AssigneeSKF GmbH
InventorsRudiger Hans, Jurgen Kober
Life of this patent
Estimating the term…
Abstract
An automatic tensioning device for drive belts is equipped with a friction damper with low damping action against vibrations transmitted by the drive belt. A hydraulic shock damper has with high damping action is provided for large surge pulses. Preferably, the hydraulic shock damper an idle stroke in which the friction damper is active.
Claims10
An automatic tensioning device for keeping an idler pulley under predetermined tension against a drive belt, said device comprising:
- a friction damper providing a light damping action in the normal operating range of the idler pulley ;
- and
- a hydraulic shock damper providing stronger damping action in a direction of travel of the idler pulley.
An automatic tensioning device for keeping an idler pulley under predetermined tension against a drive belt, said device comprising:
- a friction damper providing a light damping action in the normal operating range of the idler pulley;
- and
- a hydraulic shock damper providing a stronger damping action in a first direction of travel of the idler pulley, the damping action in the opposite direction being also less than the damping action in said first direction.
Dependencies are inferred from the claim text.