BE547272A - - Google Patents

Info

Publication number
BE547272A
BE547272A BE547272DA BE547272A BE 547272 A BE547272 A BE 547272A BE 547272D A BE547272D A BE 547272DA BE 547272 A BE547272 A BE 547272A
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 BE547272A publication Critical patent/BE547272A/xx
Priority to SE794547X priority Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/44Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E21D15/45Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
BE547272D 1955-04-25 BE547272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE794547X 1955-04-25

Publications (1)

Publication Number Publication Date
BE547272A true BE547272A (en)

Family

ID=20339739

Family Applications (1)

Application Number Title Priority Date Filing Date
BE547272D BE547272A (en) 1955-04-25

Country Status (5)

Country Link
BE (1) BE547272A (en)
DE (1) DE1001956B (en)
FR (1) FR1192133A (en)
GB (1) GB794547A (en)
LU (1) LU34334A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE568439A (en) * 1957-06-11
DE1135399B (en) * 1958-09-13 1962-08-30 Schwarz Kg Hermann Pressure medium operated pit support element
DE1082212B (en) * 1958-12-31 1960-05-25 Bwg Bergwerk Walzwerk Ventilation valve for hydraulic pit rams
DE1191776B (en) * 1962-04-09 1965-04-29 Kloeckner Werke Ag Hydraulic pit ram
BE635501A (en) * 1962-07-27 1964-01-27
GB977800A (en) * 1962-08-21 1964-12-16 Electro Hydraulics Ltd Improvements in or relating to mine roof supports

Also Published As

Publication number Publication date
FR1192133A (en) 1959-10-23
DE1001956B (en) 1957-02-07
GB794547A (en) 1958-05-07
LU34334A (en)
LU34334A1 (en)

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