TREA

Other methods or devices for dislodging with or without loading

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Industry

  • CPC
  • E21C37/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING

Current Industry

E21C37/00Other methods or devices for dislodging with or without loading

Sub Industries

E21C37/005by projectiles E21C37/02by wedges E21C37/04by devices with parts pressed mechanically against the wall of a borehole or a slit E21C37/06by making use of hydraulic or pneumatic pressure in a borehole E21C37/08Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole E21C37/10Devices with expanding elastic casings E21C37/12by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure E21C37/14by compressed air by gas blast by gasifying liquids E21C37/16by fire-setting or by similar methods based on a heat effect E21C37/18by electricity E21C37/20by ultrasonics E21C37/22Hand tools or hand-held power-operated tools specially adapted for dislodging minerals E21C37/24Pick hammers E21C37/26Chisels or other cutting tools not mentioned before
Industries

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Patents Applicationslast 30 patents