DE268337C - - Google Patents

Info

Publication number
DE268337C
DE268337C DENDAT268337D DE268337DA DE268337C DE 268337 C DE268337 C DE 268337C DE NDAT268337 D DENDAT268337 D DE NDAT268337D DE 268337D A DE268337D A DE 268337DA DE 268337 C DE268337 C DE 268337C
Authority
DE
Germany
Prior art keywords
cutting
rollers
thread
chisel
coal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT268337D
Other languages
German (de)
English (en)
Publication of DE268337C publication Critical patent/DE268337C/de
Active legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/16—Machines slitting solely by one or more rotating saws, cutting discs, or wheels
    • E21C25/18—Saws; Discs; Wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
DENDAT268337D Active DE268337C (cs)

Publications (1)

Publication Number Publication Date
DE268337C true DE268337C (cs)

Family

ID=525315

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT268337D Active DE268337C (cs)

Country Status (1)

Country Link
DE (1) DE268337C (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392218A1 (fr) * 1977-05-25 1978-12-22 Secretary Transport Brit Outil de coupe perfectionne pour le forage des roches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392218A1 (fr) * 1977-05-25 1978-12-22 Secretary Transport Brit Outil de coupe perfectionne pour le forage des roches
US4298080A (en) * 1977-05-25 1981-11-03 Secretary Of State For Transport In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Rock cutting tools

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