FR996357A - étançon métallique réglable et à jeu à clavetage à double effet - Google Patents

étançon métallique réglable et à jeu à clavetage à double effet

Info

Publication number
FR996357A
FR996357A FR996357DA FR996357A FR 996357 A FR996357 A FR 996357A FR 996357D A FR996357D A FR 996357DA FR 996357 A FR996357 A FR 996357A
Authority
FR
France
Prior art keywords
keyway
double acting
adjustable metal
metal prop
prop
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)
Inventor
Gottfried Cullmann
Albert Graff
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 filed Critical
Application granted granted Critical
Publication of FR996357A publication Critical patent/FR996357A/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

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)
FR996357D 1949-09-29 1949-09-29 étançon métallique réglable et à jeu à clavetage à double effet Expired FR996357A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR996357T 1949-09-29

Publications (1)

Publication Number Publication Date
FR996357A true FR996357A (fr) 1951-12-18

Family

ID=9557854

Family Applications (1)

Application Number Title Priority Date Filing Date
FR996357D Expired FR996357A (fr) 1949-09-29 1949-09-29 étançon métallique réglable et à jeu à clavetage à double effet

Country Status (1)

Country Link
FR (1) FR996357A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975849C (de) * 1952-07-29 1962-10-25 Wilhelm Reppel Mehrteiliger Grubenstempel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975849C (de) * 1952-07-29 1962-10-25 Wilhelm Reppel Mehrteiliger Grubenstempel

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