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imparting both a rotary and reciprocating motion

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  • CPC
  • E21C31/04
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C31/00Driving means incorporated in machines for slitting or completely freeing the mineral from the seam

Current Industry

E21C31/04imparting both a rotary and reciprocating motion
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Gravel excavation system
    • Patent number 11,401,809
    • Issue date Aug 2, 2022
    • Northern Colorado Constructors, Inc.
    • Christopher J. Zadel
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Non-concentric protruding shaft fixed bearing reciprocating impact...
    • Patent number 10,400,597
    • Issue date Sep 3, 2019
    • Suhua Liu
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method of controlling a miner to cause wobble in the cutting heads
    • Patent number 8,967,728
    • Issue date Mar 3, 2015
    • Joy MM Delaware, Inc.
    • David Stryffeler
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining machine with driven disc cutters
    • Patent number 8,636,324
    • Issue date Jan 28, 2014
    • Joy MM Delaware, Inc.
    • Theunis F. Skea
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Driving arrangement for longwall mining machines
    • Patent number 4,453,774
    • Issue date Jun 12, 1984
    • Gebr. Eickhoff Maschinefabrik und Eisengiesserei m.b.H.
    • Volker Knorr
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Cutter drum assembly for a continuous mining machine
    • Patent number 4,310,199
    • Issue date Jan 12, 1982
    • National Mine Service Company
    • Donald L. Freed
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Drum cutter mining machine
    • Patent number 4,189,188
    • Issue date Feb 19, 1980
    • Gebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H.
    • Herbert Schupphaus
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Continuous boring or cutting machine
    • Patent number 4,171,148
    • Issue date Oct 16, 1979
    • Bouygues
    • Marcel Montacie
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining machine, particularly for the working of low mine seams
    • Patent number 4,166,652
    • Issue date Sep 4, 1979
    • Gebr. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H.
    • Klaus Oberste-Beulmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Oscillating disk thin seam mining machine with steering
    • Patent number 4,045,088
    • Issue date Aug 30, 1977
    • Bechem; Hannelore
    • Karl-Gunther Bechem
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3797888
    • Patent number 3,797,888
    • Issue date Mar 19, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3460868
    • Patent number 3,460,868
    • Issue date Aug 12, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3409329
    • Patent number 3,409,329
    • Issue date Nov 5, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3309145
    • Patent number 3,309,145
    • Issue date Mar 14, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3002732
    • Patent number 3,002,732
    • Issue date Oct 3, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2751207
    • Patent number 2,751,207
    • Issue date Jun 19, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2751204
    • Patent number 2,751,204
    • Issue date Jun 19, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2659585
    • Patent number 2,659,585
    • Issue date Nov 17, 1953
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents