FR1265719A - Perfectionnements aux étais hydrauliques - Google Patents

Perfectionnements aux étais hydrauliques

Info

Publication number
FR1265719A
FR1265719A FR836452A FR836452A FR1265719A FR 1265719 A FR1265719 A FR 1265719A FR 836452 A FR836452 A FR 836452A FR 836452 A FR836452 A FR 836452A FR 1265719 A FR1265719 A FR 1265719A
Authority
FR
France
Prior art keywords
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
FR836452A
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.)
Acrow Engineers Ltd
Original Assignee
Acrow Engineers 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
Priority claimed from GB28724/59A external-priority patent/GB962543A/en
Application filed by Acrow Engineers Ltd filed Critical Acrow Engineers Ltd
Priority to FR836452A priority Critical patent/FR1265719A/fr
Application granted granted Critical
Publication of FR1265719A publication Critical patent/FR1265719A/fr
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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves

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)
FR836452A 1959-08-21 1960-08-22 Perfectionnements aux étais hydrauliques Expired FR1265719A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR836452A FR1265719A (fr) 1959-08-21 1960-08-22 Perfectionnements aux étais hydrauliques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB28724/59A GB962543A (en) 1959-08-21 1959-08-21 Improvements in and relating to hydraulic props
FR836452A FR1265719A (fr) 1959-08-21 1960-08-22 Perfectionnements aux étais hydrauliques

Publications (1)

Publication Number Publication Date
FR1265719A true FR1265719A (fr) 1961-06-30

Family

ID=26187228

Family Applications (1)

Application Number Title Priority Date Filing Date
FR836452A Expired FR1265719A (fr) 1959-08-21 1960-08-22 Perfectionnements aux étais hydrauliques

Country Status (1)

Country Link
FR (1) FR1265719A (fr)

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