Impact hammer

Claim 1

AN IMPACT HAMMER ROTOR COMPRISING: A ROTOR BODY HAVING AT LEAST ONE LONGITUDINAL CHANNEL IN THE PERIPHERY THEREOF EXTENDING FROM ONE END OF SAID BODY TO THE OTHER AND PARALLEL TO THE AXIS OF ROTATION THEREOF, SAID CHANNEL HAVING A FRONT WALL, A REAR WALL AND A BOTTOM WALL; A HAMMER BAR DETACHABLY FITTED IN SAID CHANNEL, SAID HAMMER BAR INCLUDING A BODY PORTION HAVING ITS END ABOVE THE PERIPHERY OF SAID ROTOR BODY AND A RETAINING PORTION RESIDING WITHIN THE CHANNEL; SAID RETAINING PORTION HAVING A GENERALLY CONCAVE PORTION ENGAGEABLE WITH SAID FRONT WALL WHICH DEFINES A COMPLEMENTARY, GENERALLY CONVEX SURFACE, SAID COMPLEMENTARY SURFACE EXTENDING TO THE PERIPHERY OF SAID ROTOR BODY; SAID RETAINING PORTION HAVING A GENERALLY CONVEX PORTION ON THE SIDE THEREOF OPPOSITE SAID CONCAVE PORTION, SAID CONVEX PORTION MERGING WITH SAID BODY PORTION INWARDLY OF THE PERIPHERY OF SAID ROTOR BODY, SAID BODY PORTION OF SAID HAMMER BAR ENGAGING SAID REAR WALL OF SAID CHANNEL OUTWARDLY OF THE POINT OF JUNCTURE AND SAID RETAINING PORTION BEING OUT OF ENGAGEMENT WITH SAID REAR WALL OF SAID CHANNEL INWARDLY OF THE POINT OF JUNCTURE; SAID BOTTOM WALL OF SAID CHANNEL BEING SPACED INWARDLY FROM THE LOWER EXTREMITY OF SAID RETAINING PORTION, WHEREBY SAID HAMMER BAR IS INSERTABLE INTO AND REMOVABLE FROM SAID CHANNEL BY SWINGING SAID HAMMER BAR IN A DIRECTION TRANSVERSE TO THE AXIS OF ROTATION OF SAID ROTOR BODY.