FR599691A - Scabbard for wooden props from mining operations - Google Patents

Scabbard for wooden props from mining operations

Info

Publication number
FR599691A
FR599691A FR599691DA FR599691A FR 599691 A FR599691 A FR 599691A FR 599691D A FR599691D A FR 599691DA FR 599691 A FR599691 A FR 599691A
Authority
FR
France
Prior art keywords
scabbard
mining operations
wooden props
props
wooden
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)
Inventor
Carl Wilke
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 filed Critical
Application granted granted Critical
Publication of FR599691A publication Critical patent/FR599691A/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)
FR599691D 1925-06-18 1925-06-18 Scabbard for wooden props from mining operations Expired FR599691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR599691T 1925-06-18

Publications (1)

Publication Number Publication Date
FR599691A true FR599691A (en) 1926-01-18

Family

ID=8969711

Family Applications (1)

Application Number Title Priority Date Filing Date
FR599691D Expired FR599691A (en) 1925-06-18 1925-06-18 Scabbard for wooden props from mining operations

Country Status (1)

Country Link
FR (1) FR599691A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030434B (en) * 1955-11-24 1958-05-22 Ernst Massar Dr Ing Permanent magnet excited synchronous machine with pronounced poles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030434B (en) * 1955-11-24 1958-05-22 Ernst Massar Dr Ing Permanent magnet excited synchronous machine with pronounced poles

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