FR1220768A - étançon ou vérin hydraulique - Google Patents

étançon ou vérin hydraulique

Info

Publication number
FR1220768A
FR1220768A FR793561A FR793561A FR1220768A FR 1220768 A FR1220768 A FR 1220768A FR 793561 A FR793561 A FR 793561A FR 793561 A FR793561 A FR 793561A FR 1220768 A FR1220768 A FR 1220768A
Authority
FR
France
Prior art keywords
prop
hydraulic cylinder
hydraulic
cylinder
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
FR793561A
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
Application filed by Acrow Engineers Ltd filed Critical Acrow Engineers Ltd
Application granted granted Critical
Publication of FR1220768A publication Critical patent/FR1220768A/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)
FR793561A 1958-05-02 1959-04-29 étançon ou vérin hydraulique Expired FR1220768A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1220768X 1958-05-02

Publications (1)

Publication Number Publication Date
FR1220768A true FR1220768A (fr) 1960-05-27

Family

ID=10883625

Family Applications (1)

Application Number Title Priority Date Filing Date
FR793561A Expired FR1220768A (fr) 1958-05-02 1959-04-29 étançon ou vérin hydraulique

Country Status (1)

Country Link
FR (1) FR1220768A (fr)

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