PL293251A1 - Punch - Google Patents

Punch

Info

Publication number
PL293251A1
PL293251A1 PL29325192A PL29325192A PL293251A1 PL 293251 A1 PL293251 A1 PL 293251A1 PL 29325192 A PL29325192 A PL 29325192A PL 29325192 A PL29325192 A PL 29325192A PL 293251 A1 PL293251 A1 PL 293251A1
Authority
PL
Poland
Prior art keywords
punch
Prior art date
Application number
PL29325192A
Inventor
Khaled Shawwaf
Thomas Herbst
Johann Wlodkowski
Ray Brandon
Original Assignee
Dyckerhoff & Widmann 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 Dyckerhoff & Widmann Ag filed Critical Dyckerhoff & Widmann Ag
Publication of PL293251A1 publication Critical patent/PL293251A1/en

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
    • E21D15/22—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed 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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Joining Of Building Structures In Genera (AREA)
PL29325192A 1991-01-22 1992-01-22 Punch PL293251A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64500091A 1991-01-22 1991-01-22

Publications (1)

Publication Number Publication Date
PL293251A1 true PL293251A1 (en) 1992-10-05

Family

ID=24587241

Family Applications (1)

Application Number Title Priority Date Filing Date
PL29325192A PL293251A1 (en) 1991-01-22 1992-01-22 Punch

Country Status (6)

Country Link
AU (1) AU651653B2 (en)
CA (1) CA2059575A1 (en)
FR (1) FR2671829A1 (en)
GB (1) GB2252114A (en)
PL (1) PL293251A1 (en)
ZA (1) ZA92159B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314161A (en) * 1992-05-29 1994-05-24 Bochumer Eisenhutte Heintzmann Gmbh & Co. Kg Mine prop
GB2302578B (en) * 1995-06-23 1999-02-17 R G Manufacturing Ltd Nudge bar and energy absorbing device
US9677690B2 (en) 2010-02-08 2017-06-13 Thomas & Betts International, Llc Multi-purpose roof-top support
CN104179366B (en) * 2014-08-21 2016-04-27 四川金锋建设有限公司 Recessed device prevented by large span thin plate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE875335C (en) * 1950-07-19 1953-04-30 Walter Murmann Flexible multi-part extension stamp
AU542884B2 (en) * 1980-07-31 1985-03-21 Dipl.Ing. Dr. Mont. Franz Powondra Resilient yieldable device
AT376009B (en) * 1982-12-13 1984-10-10 Powondra Franz Dipl Ing Dr METHOD FOR OBTAINING A FLEXIBLE CONNECTION BETWEEN A METALLIC ROD-SHAPED BODY AND A BRACKET THROUGH IT
DE3503012A1 (en) * 1985-01-30 1986-07-31 Dyckerhoff & Widmann AG, 8000 München TENSIONING DEVICE FOR THE TIE LINK OF AN ANCHOR, ESPECIALLY A ROCK ANCHOR

Also Published As

Publication number Publication date
GB2252114A (en) 1992-07-29
AU1008392A (en) 1992-07-30
ZA92159B (en) 1992-10-28
GB9200725D0 (en) 1992-03-11
CA2059575A1 (en) 1992-07-23
FR2671829A1 (en) 1992-07-24
AU651653B2 (en) 1994-07-28

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