Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member

Full Title

Percussion drilling > Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

EARTH OR ROCK DRILLING; MINING

Subclass:

EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS