Hand-held working tool used as a drill hammer has a pneumatically-operated actuator, and an air spring

摘要

Hand-held working tool has a pneumatically-operated actuator (4), and an air spring (11). An independent claim is also included for a device for damping oscillations in the working tool. Preferred Features: The actuator has a compressed air storage unit (10) filled with compressed air by a plunger (7). A sensor is provided to determine the relative position of two units of the tool. A spring is arranged between the two units parallel to the actuator.