FR991993A - étançon de mine en fer - Google Patents

étançon de mine en fer

Info

Publication number: FR991993A
Authority: FR; France
Prior art keywords: iron mine; mine prop; prop; iron; mine
Prior art date: 1948-08-05
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

Inventor

Hans Gerlach

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.)

1948-12-11

Filing date

1948-08-05

Publication date

1951-10-12

1948-08-05 Application filed filed Critical

1951-10-12 Application granted granted Critical

1951-10-12 Publication of FR991993A publication Critical patent/FR991993A/fr

Status Expired legal-status Critical Current

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
- E21D15/50—Component parts or details of props
- E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section

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)

FR991993D 1948-12-11 1948-08-05 étançon de mine en fer Expired FR991993A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE991993X		1948-12-11

Publications (1)

Publication Number	Publication Date
FR991993A true FR991993A (fr)	1951-10-12

Family

ID=6918901

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR991993D Expired FR991993A (fr)	1948-12-11	1948-08-05	étançon de mine en fer

Country Status (1)

Country	Link
FR (1)	FR991993A (fr)

1948
- 1948-08-05 FR FR991993D patent/FR991993A/fr not_active Expired

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