Tool for breaking up rock or like structures
OwnerJohan D. Kunnekeinventor
Life of this patent
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Abstract
A rock breaking tool comprising a firing mechanism and firing chamber for discharging a blank cartridge into an impulse barrel. The impulse barrel has lateral openings and is intended to be inserted into a predrilled water filled hole in rock to be broken up. The barrel has a venturi throat for increasing cartridge discharge gas velocity.
Claims9
A firing mechanism having a body adapted to be releasably connected to a firing chamber, and housing a slidable firing in biasable towards a striking position and movable to a cocked position, the rear of the firing pin carrying a screw threaded end cap screwable relative to the firing pin to react against the body and move the firing pin to a cocked position, the firing pin being adapted to cooperate with a trigger stop to hold the firing pin in the cocked position, and with the firing pin in this position, the end cap being screwable away from the body to allow firing pin travel between the cocked and the striking positions.
Dependencies are inferred from the claim text.