TREA

Machines in which the tool is connected to an impulse member

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Industry

  • CPC
  • E21C3/02
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C3/00Drilling machines with reciprocating tool that is intermittently turned when out of contact with the working face

Current Industry

E21C3/02Machines in which the tool is connected to an impulse member
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Drillhead unit
    • Patent number 4,294,317
    • Issue date Oct 13, 1981
    • M.A.T. Industries, Inc.
    • Michael J. Amoroso
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic rock drill with stroke responsive advance
    • Patent number 3,945,442
    • Issue date Mar 23, 1976
    • Chicago Pneumatic Tool Company
    • Lester A. Amtsberg
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    3918531
    • Patent number 3,918,531
    • Issue date Nov 11, 1975
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    3918532
    • Patent number 3,918,532
    • Issue date Nov 11, 1975
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    3796401
    • Patent number 3,796,401
    • Issue date Mar 12, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3791460
    • Patent number 3,791,460
    • Issue date Feb 12, 1974
    • E21 - EARTH DRILLING MINING