FR974408A - Steel cap for mine support system - Google Patents

Steel cap for mine support system

Info

Publication number
FR974408A
FR974408A FR974408DA FR974408A FR 974408 A FR974408 A FR 974408A FR 974408D A FR974408D A FR 974408DA FR 974408 A FR974408 A FR 974408A
Authority
FR
France
Prior art keywords
support system
steel cap
mine support
mine
cap
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
Hubert Joseph Wetzels
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 FR974408A publication Critical patent/FR974408A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
FR974408D 1947-10-28 1948-10-28 Steel cap for mine support system Expired FR974408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL135668A NL70945C (en) 1947-10-28 1947-10-28 Metal cover for mine support

Publications (1)

Publication Number Publication Date
FR974408A true FR974408A (en) 1951-02-22

Family

ID=19866319

Family Applications (1)

Application Number Title Priority Date Filing Date
FR974408D Expired FR974408A (en) 1947-10-28 1948-10-28 Steel cap for mine support system

Country Status (4)

Country Link
BE (1) BE485483A (en)
DE (2) DE944785C (en)
FR (1) FR974408A (en)
NL (1) NL70945C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991097A (en) * 1948-07-08 1961-07-04 Vanwersch Aloys Connecting structure for beams of a roof support or the like
DE977597C (en) * 1950-11-01 1967-06-22 Ludwig Vanwersch Expansion cap

Also Published As

Publication number Publication date
BE485483A (en) 1949-11-13
NL70945C (en) 1952-10-15
DE944785C (en) 1956-06-21
DE937882C (en) 1956-01-19

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