FR1071004A - étançon en acier pour mines - Google Patents

étançon en acier pour mines

Info

Publication number
FR1071004A
FR1071004A FR1071004DA FR1071004A FR 1071004 A FR1071004 A FR 1071004A FR 1071004D A FR1071004D A FR 1071004DA FR 1071004 A FR1071004 A FR 1071004A
Authority
FR
France
Prior art keywords
mines
steel prop
prop
steel
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.)
Ringfeder GmbH
Original Assignee
Ringfeder 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 Ringfeder GmbH filed Critical Ringfeder GmbH
Application granted granted Critical
Publication of FR1071004A publication Critical patent/FR1071004A/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
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
    • E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring

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)
FR1071004D 1949-12-13 1949-12-13 étançon en acier pour mines Expired FR1071004A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1071004T 1949-12-13

Publications (1)

Publication Number Publication Date
FR1071004A true FR1071004A (fr) 1954-08-24

Family

ID=9604957

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1071004D Expired FR1071004A (fr) 1949-12-13 1949-12-13 étançon en acier pour mines

Country Status (1)

Country Link
FR (1) FR1071004A (fr)

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