Patent ID: 6095394
Filing Date: 2000-08-01
Classification: B25C

Abstract:
A pneumatic hammer comprising:a cap having a recessed portion defined therein and a plurality of first outlets defined through said cap, said first outlets communicating with said recessed portion;a base member having a receiving portion in a center thereof and a neck extending from said base member, said neck communicating with said receiving portion, a plurality of second outlets and an inlet respectively defined through said base member and respectively communicating with said receiving portion, said cap mounted to said base member and located in opposite to said neck, said recessed portion of said cap communicating with said receiving portion of said base member;a tubular member received in said recessed portion of said cap and said receiving portion in said base member, a spring member biased between said cap and a first end of said tubular member, said tubular member having a central hole defined through said first end thereof;a piston reciprocatingly received in said tubular member and a piston rod extending from said piston, anda sleeve movably received in said receiving portion of said base member and said tubular member snugly extending through said sleeve.