Air spring impactor for hammer drill has impact piston defining fluid chamber with drive piston in guide shell

摘要

The air spring has a casing (21) with an impact piston (22) having a guide shell (25) enclosing a drive piston (3) defining a chamber (23) with the impact piston. The guide shell has an air compensating slit (24) and the casing has an vent duct (27) for the chamber.