Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Rudolf Berger0
Wolfgang Schmid0
Date of Patent
June 1, 2010
Patent Application Number
11930839
Date Filed
October 31, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
An air spring hammer device that includes a drive piston, moving axially back and forth, with a front face of hollow embodiment and a hammer piston moving in said hollow. A ventilation slot is embodied in a guide wall of the drive piston. The drive piston may be guided in a guide tube. The guide tube comprises several idle openings. A moving control element is arranged on the exterior of the guide tube, in which control openings, corresponding to the idle openings, are provided. In an idle operating mode, the control element is in an open position, via which the ventilation slot, the idle openings and the control openings can be brought into connection with the environment.
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