Other methods or devices for dislodging with or without loading

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

EARTH OR ROCK DRILLING; MINING

Subclass:

MINING OR QUARRYING

Child Classifications

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• E21C 37/02 by wedges
• E21C 37/04 by devices with parts pressed mechanically against the wall of a borehole
• E21C 37/06 by making use of hydraulic or pneumatic pressure in a borehole
• E21C 37/16 by fire-setting or by similar methods based on a heat effect
• E21C 37/18 by electricity
• E21C 37/2 by ultrasonic waves
• E21C 37/22 Hand tools or hand-held power-operated tools specially adapted for dislodging minerals
• E21C 37/26 Chisels or other cutting tools not mentioned before