FR59376E - étançon de mine - Google Patents

étançon de mine

Info

Publication number: FR59376E
Authority: FR; France
Prior art keywords: mine prop; prop; mine
Prior art date: 1949-06-23
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.)

1949-06-23

Filing date

1949-06-23

Publication date

1954-05-25

1949-06-23 Application filed filed Critical

1954-05-25 Application granted granted Critical

1954-05-25 Publication of FR59376E publication Critical patent/FR59376E/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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

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)

FR59376D 1949-06-23 1949-06-23 étançon de mine Expired FR59376E (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR59376T		1949-06-23

Publications (1)

Publication Number	Publication Date
FR59376E true FR59376E (fr)	1954-05-25

Family

ID=8693207

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR59376D Expired FR59376E (fr)	1949-06-23	1949-06-23	étançon de mine

Country Status (1)

Country	Link
FR (1)	FR59376E (fr)

1949
- 1949-06-23 FR FR59376D patent/FR59376E/fr not_active Expired

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