FR1070311A - Friction lock for mine prop - Google Patents

Friction lock for mine prop

Info

Publication number
FR1070311A
FR1070311A FR1070311DA FR1070311A FR 1070311 A FR1070311 A FR 1070311A FR 1070311D A FR1070311D A FR 1070311DA FR 1070311 A FR1070311 A FR 1070311A
Authority
FR
France
Prior art keywords
friction lock
mine prop
prop
mine
friction
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
French (fr)
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.)
RECH S IND ET MINIERES SOC ET
Original Assignee
RECH S IND ET MINIERES SOC ET
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 RECH S IND ET MINIERES SOC ET filed Critical RECH S IND ET MINIERES SOC ET
Application granted granted Critical
Publication of FR1070311A publication Critical patent/FR1070311A/en
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
    • E21D15/30—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
    • E21D15/306—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber by means of a liquid

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)
FR1070311D 1953-02-04 1953-02-04 Friction lock for mine prop Expired FR1070311A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1070311T 1953-02-04

Publications (1)

Publication Number Publication Date
FR1070311A true FR1070311A (en) 1954-07-22

Family

ID=9604648

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1070311D Expired FR1070311A (en) 1953-02-04 1953-02-04 Friction lock for mine prop

Country Status (1)

Country Link
FR (1) FR1070311A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184206A (en) * 1962-03-20 1965-05-18 Mines Domaniales De Potasse Support units especially for mine roof
US4037811A (en) * 1975-12-24 1977-07-26 Oconnor Chadwell Vertical control for instrument support structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184206A (en) * 1962-03-20 1965-05-18 Mines Domaniales De Potasse Support units especially for mine roof
US4037811A (en) * 1975-12-24 1977-07-26 Oconnor Chadwell Vertical control for instrument support structure

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