Demolition tool for breaking solid materials

Details Demolition tool for breaking solid materials Demolition tool for breaking solid materials

B - Operations, Transporting

25

D

138/40.1

B25D 9/12 (2006.01) E21C 37/22 (2006.01)

Patent

CA 1113832

A b s t r a c t A demolition tool for breaking solid materials, particularly rock or concrete in tunnelling, mining, demolishing and excavating applications. The tool has a single impactor (1) of projectile type which is driven by high pressure liquid towards the material to be broken. A gas pressure accumulator (2) is included for storing high pressure energy. This energy is transferred at a high rate through short, wide ant streamlined channel means (8, 13, 57, 9), having high capacity and low flow losses, to the impactor (1). Valve means (7) is provided in the channel means so that the accumulator (2) can be recharged during the return stroke of the impactor, giving a high repetition rate. A low pressure annular accumulator (5) drives the impactor during the return stroke.

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