摘要 |
<p>The pneumatic hammer has a housing in which a striker reciprocates this having a relieved middle portion and a space at the tail end open towards the rear. Gas under pressure is delivered alternately to the tail end space and that round the relieved portion. The tail end space (7) opens into a chamber in the housing (14) extending in the axial direction, and which at the other end is freely connected to atmosphere.</p> |