FR1229543A - Improvements to hydraulic mine props - Google Patents

Improvements to hydraulic mine props

Info

Publication number
FR1229543A
FR1229543A FR799906A FR799906A FR1229543A FR 1229543 A FR1229543 A FR 1229543A FR 799906 A FR799906 A FR 799906A FR 799906 A FR799906 A FR 799906A FR 1229543 A FR1229543 A FR 1229543A
Authority
FR
France
Prior art keywords
mine props
hydraulic mine
hydraulic
props
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
FR799906A
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.)
Dobson Ltd W E & F
WE&F Dobson Ltd
Original Assignee
Dobson Ltd W E & F
WE&F Dobson Ltd
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 Dobson Ltd W E & F, WE&F Dobson Ltd filed Critical Dobson Ltd W E & F
Application granted granted Critical
Publication of FR1229543A publication Critical patent/FR1229543A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/60—Devices for withdrawing props or chocks
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
FR799906A 1958-10-25 1959-07-10 Improvements to hydraulic mine props Expired FR1229543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3422258A GB903091A (en) 1958-10-25 1958-10-25 Improvements in or relating to hydraulic pit props

Publications (1)

Publication Number Publication Date
FR1229543A true FR1229543A (en) 1960-09-07

Family

ID=10362920

Family Applications (1)

Application Number Title Priority Date Filing Date
FR799906A Expired FR1229543A (en) 1958-10-25 1959-07-10 Improvements to hydraulic mine props

Country Status (3)

Country Link
BE (1) BE574154A (en)
FR (1) FR1229543A (en)
GB (1) GB903091A (en)

Also Published As

Publication number Publication date
BE574154A (en) 1959-04-16
GB903091A (en) 1962-08-09

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