GB794547A - Improvements in or relating to extensible pit-props - Google Patents

Improvements in or relating to extensible pit-props

Info

Publication number
GB794547A
GB794547A GB12734/56A GB1273456A GB794547A GB 794547 A GB794547 A GB 794547A GB 12734/56 A GB12734/56 A GB 12734/56A GB 1273456 A GB1273456 A GB 1273456A GB 794547 A GB794547 A GB 794547A
Authority
GB
United Kingdom
Prior art keywords
piston
tube
prop
space
compressed air
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
GB12734/56A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Verschure & Co S Scheepswerf E
Original Assignee
Verschure & Co S Scheepswerf E
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 Verschure & Co S Scheepswerf E filed Critical Verschure & Co S Scheepswerf E
Publication of GB794547A publication Critical patent/GB794547A/en
Expired legal-status Critical Current

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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators

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)
  • Press Drives And Press Lines (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Reciprocating Pumps (AREA)
GB12734/56A 1955-04-25 1956-04-25 Improvements in or relating to extensible pit-props Expired GB794547A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB794547A true GB794547A (en) 1958-05-07

Family

ID=20339739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12734/56A Expired GB794547A (en) 1955-04-25 1956-04-25 Improvements in or relating to extensible pit-props

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193460B (de) * 1962-07-27 1965-05-26 Gewerk Eisenhuette Westfalia Hydraulischer Grubenstempel

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE568439A (enrdf_load_stackoverflow) * 1957-06-11
DE1135399B (de) * 1958-09-13 1962-08-30 Hermann Schwarz Kommanditgesel Druckmittelbetriebenes Grubenausbauelement
DE1082212B (de) * 1958-12-31 1960-05-25 Bwg Bergwerk Walzwerk Be- und Entlueftungsventil fuer hydraulische Grubenstempel
DE1191776B (de) * 1962-04-09 1965-04-29 Kloeckner Werke Ag Hydraulischer Grubenstempel
GB977800A (en) * 1962-08-21 1964-12-16 Electro Hydraulics Ltd Improvements in or relating to mine roof supports

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193460B (de) * 1962-07-27 1965-05-26 Gewerk Eisenhuette Westfalia Hydraulischer Grubenstempel

Also Published As

Publication number Publication date
BE547272A (enrdf_load_stackoverflow)
FR1192133A (fr) 1959-10-23
DE1001956B (de) 1957-02-07
LU34334A1 (enrdf_load_stackoverflow)

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