BE502749A - - Google Patents

Info

Publication number
BE502749A
BE502749A BE502749DA BE502749A BE 502749 A BE502749 A BE 502749A BE 502749D A BE502749D A BE 502749DA BE 502749 A BE502749 A BE 502749A
Authority
BE
Belgium
Application number
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.)
Publication of BE502749A publication Critical patent/BE502749A/xx

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)
  • Emergency Lowering Means (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Clamps And Clips (AREA)
BE502749D 1951-04-23 BE502749A (ko)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE718457X 1951-04-23

Publications (1)

Publication Number Publication Date
BE502749A true BE502749A (ko)

Family

ID=3878822

Family Applications (1)

Application Number Title Priority Date Filing Date
BE502749D BE502749A (ko) 1951-04-23

Country Status (6)

Country Link
BE (1) BE502749A (ko)
DE (1) DE1022538B (ko)
FR (1) FR1054501A (ko)
GB (1) GB718457A (ko)
LU (1) LU31403A1 (ko)
NL (1) NL83499C (ko)

Cited By (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
US4653951A (en) * 1985-08-12 1987-03-31 General Dynamics Corp./Convair Division Zero free-play joint for deployable space structures

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881776A (en) * 1988-11-22 1989-11-21 Casual Living International Inc. Chairs with foldable backs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE804317C (de) * 1949-03-22 1951-04-19 Otto Leppak Verfahren zur Schaffung einer stempelfreien Abbaufront beim eisernen Strebausbau

Cited By (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
US4653951A (en) * 1985-08-12 1987-03-31 General Dynamics Corp./Convair Division Zero free-play joint for deployable space structures

Also Published As

Publication number Publication date
LU31403A1 (ko)
GB718457A (en) 1954-11-17
DE1022538B (de) 1958-01-16
NL83499C (ko)
FR1054501A (fr) 1954-02-11

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