Patent ID: 8776911

Claim:
A hydraulic breaker comprising: a back head provided therein with a gas chamber; a cylinder assembled to a lower portion of the back head; a front head assembled to a lower portion of the cylinder; a piston moving up and down in the cylinder; and a chisel installed in the front head, wherein semicircular ring slots are defined in both sides of a bottom of the back head, both sides of a top of the cylinder, both sides of a bottom of the cylinder, and both sides of a top of the front head, respectively, and fastening rings are installed in circular ring slots formed by joining the semicircular ring slots defined in both sides of the bottom of the back head to the semicircular ring slots defined in both sides of the top of the cylinder, and the fastening rings are installed in circular ring slots formed by joining the semicircular ring slots defined in both sides of the bottom of the cylinder to the semicircular ring slots defined in both sides of the top of the front head in order to assemble the back head, the cylinder, and the front head with each other.