FR700520A - Improvements to mechanical backfillers - Google Patents

Improvements to mechanical backfillers

Info

Publication number
FR700520A
FR700520A FR700520DA FR700520A FR 700520 A FR700520 A FR 700520A FR 700520D A FR700520D A FR 700520DA FR 700520 A FR700520 A FR 700520A
Authority
FR
France
Prior art keywords
backfillers
mechanical
mechanical backfillers
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)
Inventor
Louis-Joseph-Eugene Boileau
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 FR700520A publication Critical patent/FR700520A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/06—Filling-up mechanically
FR700520D 1929-11-25 1929-11-25 Improvements to mechanical backfillers Expired FR700520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR700520T 1929-11-25

Publications (1)

Publication Number Publication Date
FR700520A true FR700520A (en) 1931-03-02

Family

ID=9050613

Family Applications (1)

Application Number Title Priority Date Filing Date
FR700520D Expired FR700520A (en) 1929-11-25 1929-11-25 Improvements to mechanical backfillers

Country Status (1)

Country Link
FR (1) FR700520A (en)

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