FR832047A - ? for mines - Google Patents

? for mines

Info

Publication number
FR832047A
FR832047A FR832047DA FR832047A FR 832047 A FR832047 A FR 832047A FR 832047D A FR832047D A FR 832047DA FR 832047 A FR832047 A FR 832047A
Authority
FR
France
Prior art keywords
mines
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.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAAR METALLWERKE AG
Original Assignee
SAAR METALLWERKE AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SAAR METALLWERKE AG filed Critical SAAR METALLWERKE AG
Application granted granted Critical
Publication of FR832047A publication Critical patent/FR832047A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR832047D 1938-01-13 1938-01-13 ? for mines Expired FR832047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR832047T 1938-01-13

Publications (1)

Publication Number Publication Date
FR832047A true FR832047A (en) 1938-09-20

Family

ID=9295397

Family Applications (1)

Application Number Title Priority Date Filing Date
FR832047D Expired FR832047A (en) 1938-01-13 1938-01-13 ? for mines

Country Status (1)

Country Link
FR (1) FR832047A (en)

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