FR991111A - Serrure pour étançons - Google Patents

Serrure pour étançons

Info

Publication number
FR991111A
FR991111A FR991111DA FR991111A FR 991111 A FR991111 A FR 991111A FR 991111D A FR991111D A FR 991111DA FR 991111 A FR991111 A FR 991111A
Authority
FR
France
Prior art keywords
props
lock
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.)
LE PROGRES CHARBONNIER PROCHAR
Original Assignee
LE PROGRES CHARBONNIER PROCHAR
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 LE PROGRES CHARBONNIER PROCHAR filed Critical LE PROGRES CHARBONNIER PROCHAR
Application granted granted Critical
Publication of FR991111A publication Critical patent/FR991111A/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
    • E21D15/40—Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted

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)
FR991111D 1949-04-04 1949-07-22 Serrure pour étançons Expired FR991111A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE991111X 1949-04-04

Publications (1)

Publication Number Publication Date
FR991111A true FR991111A (fr) 1951-10-01

Family

ID=3892233

Family Applications (1)

Application Number Title Priority Date Filing Date
FR991111D Expired FR991111A (fr) 1949-04-04 1949-07-22 Serrure pour étançons

Country Status (1)

Country Link
FR (1) FR991111A (fr)

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