BE494572A - - Google Patents

Info

Publication number
BE494572A
BE494572A BE494572DA BE494572A BE 494572 A BE494572 A BE 494572A BE 494572D A BE494572D A BE 494572DA BE 494572 A BE494572 A BE 494572A
Authority
BE
Belgium
Prior art keywords
emi
prop
chamber
cylinder
piston
Prior art date
Application number
Other languages
English (en)
French (fr)
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 BE494572A publication Critical patent/BE494572A/fr

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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control
    • 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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

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)
  • Portable Nailing Machines And Staplers (AREA)
  • Safety Valves (AREA)
BE494572D 1949-12-08 BE494572A (OSRAM)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER512A DE813542C (de) 1949-12-08 1949-12-08 Hydraulischer Grubenstempel mit einstellbarem Verformungsschutz

Publications (1)

Publication Number Publication Date
BE494572A true BE494572A (OSRAM)

Family

ID=7395143

Family Applications (1)

Application Number Title Priority Date Filing Date
BE494572D BE494572A (OSRAM) 1949-12-08

Country Status (3)

Country Link
BE (1) BE494572A (OSRAM)
DE (1) DE813542C (OSRAM)
FR (1) FR1012668A (OSRAM)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971740C (de) * 1951-04-28 1959-03-19 Ringfeder Gmbh Grubenstempel
DE1043251B (de) * 1955-06-24 1958-11-13 Hemscheidt Maschf Hermann Grubenausbaustempel
DE1010033B (de) * 1956-03-16 1957-06-13 Eisenwerk Wanheim G M B H Vorrichtung zum Abstreifen von Schmutz an Grubenstempeln
BE559110A (OSRAM) * 1956-07-11
NL229755A (OSRAM) * 1957-07-20

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE621526C (de) * 1933-02-10 1935-11-08 Hugo Schramm Aus zwei ineinanderverschiebbaren Teilen bestehender nachgiebiger Grubenstempel
DE640845C (de) * 1935-05-27 1937-01-13 Wilhelm Fehlemann Nachgiebiger Grubenstempel

Also Published As

Publication number Publication date
DE813542C (de) 1951-09-13
FR1012668A (fr) 1952-07-16

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