Patent ID: 8181716

Claim:
A breaking apparatus including: a housing; a striker pin having a driven end and an impact end, locatable in said housing in at least one retaining location to protrude said impact end through the housing; a moveable mass for impacting on said driven end of the striker pin, and a shock-absorber coupled to said retaining location, characterised in that said shock-absorber includes at least a first and second shock-absorbing assemblies, wherein; said first shock-absorbing assembly includes at least two elastic and at least one inelastic layer located internally within said housing about the striker pin between said retaining location and said striker pin impact end, said second shock-absorbing assembly being located internally within said housing about the striker pin between said retaining location and said striker pin driven end, both said shock-absorbing assemblies being configured to allow movement of the shock absorber parallel to, or co-axial with the striker pin longitudinal axis during use, at least one shock-absorbing assembly is slideably retained within the housing about the striker pin, the housing includes two or more guide elements arranged on inner walls of the housing and orientated parallel to the longitudinal axis of the striker pin, said guide elements configured to slideably engage with a complementary projection located about an elastic layer periphery.