FR1102978A - Improvements to hydraulic props for mines - Google Patents

Improvements to hydraulic props for mines

Info

Publication number
FR1102978A
FR1102978A FR1102978DA FR1102978A FR 1102978 A FR1102978 A FR 1102978A FR 1102978D A FR1102978D A FR 1102978DA FR 1102978 A FR1102978 A FR 1102978A
Authority
FR
France
Prior art keywords
mines
hydraulic props
props
hydraulic
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
Other languages
French (fr)
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.)
DOWTY AUTO UNITS Ltd
Original Assignee
DOWTY AUTO UNITS Ltd
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 DOWTY AUTO UNITS Ltd filed Critical DOWTY AUTO UNITS Ltd
Application granted granted Critical
Publication of FR1102978A publication Critical patent/FR1102978A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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)
  • Actuator (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Sealing Devices (AREA)
FR1102978D 1953-01-24 1954-01-22 Improvements to hydraulic props for mines Expired FR1102978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB210853A GB742118A (en) 1953-01-24 1953-01-24 Improvements in hydraulic pit props

Publications (1)

Publication Number Publication Date
FR1102978A true FR1102978A (en) 1955-10-27

Family

ID=9733763

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1102978D Expired FR1102978A (en) 1953-01-24 1954-01-22 Improvements to hydraulic props for mines

Country Status (2)

Country Link
FR (1) FR1102978A (en)
GB (1) GB742118A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206830B (en) * 1962-08-27 1965-12-16 Bochumer Eisen Heintzmann Hydraulic pit ram

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904866A (en) * 1958-06-30 1962-08-29 Dowty Mining Equipment Ltd Improvements in hydraulic props
BE638885A (en) * 1962-10-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206830B (en) * 1962-08-27 1965-12-16 Bochumer Eisen Heintzmann Hydraulic pit ram

Also Published As

Publication number Publication date
GB742118A (en) 1955-12-21

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