FR1177656A - étançon de mine extensible - Google Patents

étançon de mine extensible

Info

Publication number
FR1177656A
FR1177656A FR1177656DA FR1177656A FR 1177656 A FR1177656 A FR 1177656A FR 1177656D A FR1177656D A FR 1177656DA FR 1177656 A FR1177656 A FR 1177656A
Authority
FR
France
Prior art keywords
extendable
mine prop
prop
mine
extendable mine
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
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.)
MASCHINENFABRIK EUGEN BELLMANN GmbH
Original Assignee
MASCHINENFABRIK EUGEN BELLMANN GmbH
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 MASCHINENFABRIK EUGEN BELLMANN GmbH filed Critical MASCHINENFABRIK EUGEN BELLMANN GmbH
Application granted granted Critical
Publication of FR1177656A publication Critical patent/FR1177656A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/588—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded the lock also being activated

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)
FR1177656D 1957-07-01 1957-07-01 étançon de mine extensible Expired FR1177656A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1177656T 1957-07-01

Publications (1)

Publication Number Publication Date
FR1177656A true FR1177656A (fr) 1959-04-28

Family

ID=9660344

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1177656D Expired FR1177656A (fr) 1957-07-01 1957-07-01 étançon de mine extensible

Country Status (1)

Country Link
FR (1) FR1177656A (fr)

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