FR1000900A - étançon de sécurité pour exploitations minières - Google Patents
étançon de sécurité pour exploitations minièresInfo
- Publication number
- FR1000900A FR1000900A FR1000900DA FR1000900A FR 1000900 A FR1000900 A FR 1000900A FR 1000900D A FR1000900D A FR 1000900DA FR 1000900 A FR1000900 A FR 1000900A
- Authority
- FR
- France
- Prior art keywords
- mining operations
- safety prop
- prop
- safety
- mining
- 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
Links
- 238000005065 mining Methods 0.000 title 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
- E21C29/06—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains anchored at one or both ends to the mine working face
- E21C29/08—Anchoring arrangements
-
- 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
-
- 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Emergency Lowering Means (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1000900T | 1949-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1000900A true FR1000900A (fr) | 1952-02-18 |
Family
ID=9560806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1000900D Expired FR1000900A (fr) | 1949-11-29 | 1949-11-29 | étançon de sécurité pour exploitations minières |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE803171C (fr) |
FR (1) | FR1000900A (fr) |
GB (1) | GB667434A (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2892606A (en) * | 1953-10-26 | 1959-06-30 | Mentor C Addicks | Corner mounting device for sheaves and the like |
-
1949
- 1949-11-29 FR FR1000900D patent/FR1000900A/fr not_active Expired
- 1949-12-13 DE DER573A patent/DE803171C/de not_active Expired
-
1950
- 1950-02-08 GB GB3207/50A patent/GB667434A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB667434A (en) | 1952-02-27 |
DE803171C (de) | 1951-03-01 |
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