FR1452941A - Improvements made to hydraulic supports for mine ceilings - Google Patents

Improvements made to hydraulic supports for mine ceilings

Info

Publication number
FR1452941A
FR1452941A FR28976A FR28976A FR1452941A FR 1452941 A FR1452941 A FR 1452941A FR 28976 A FR28976 A FR 28976A FR 28976 A FR28976 A FR 28976A FR 1452941 A FR1452941 A FR 1452941A
Authority
FR
France
Prior art keywords
improvements made
hydraulic supports
ceilings
mine
mine ceilings
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
FR28976A
Other languages
French (fr)
Inventor
Lewis Robert Bower
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.)
WILD A G & CO Ltd
Original Assignee
WILD A G & CO 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 WILD A G & CO Ltd filed Critical WILD A G & CO Ltd
Priority to FR28976A priority Critical patent/FR1452941A/en
Application granted granted Critical
Publication of FR1452941A publication Critical patent/FR1452941A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section
FR28976A 1965-08-20 1965-08-20 Improvements made to hydraulic supports for mine ceilings Expired FR1452941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR28976A FR1452941A (en) 1965-08-20 1965-08-20 Improvements made to hydraulic supports for mine ceilings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR28976A FR1452941A (en) 1965-08-20 1965-08-20 Improvements made to hydraulic supports for mine ceilings

Publications (1)

Publication Number Publication Date
FR1452941A true FR1452941A (en) 1966-04-15

Family

ID=8586982

Family Applications (1)

Application Number Title Priority Date Filing Date
FR28976A Expired FR1452941A (en) 1965-08-20 1965-08-20 Improvements made to hydraulic supports for mine ceilings

Country Status (1)

Country Link
FR (1) FR1452941A (en)

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