FR958808A - - Google Patents
Info
- Publication number
- FR958808A FR958808A FR958808DA FR958808A FR 958808 A FR958808 A FR 958808A FR 958808D A FR958808D A FR 958808DA FR 958808 A FR958808 A FR 958808A
- Authority
- FR
- France
- 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
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)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL128634A NL69243C (h) | 1946-11-07 | 1946-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR958808A true FR958808A (h) | 1950-03-21 |
Family
ID=1821563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR958808D Expired FR958808A (h) | 1946-11-07 | 1947-12-30 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE478763A (h) |
| FR (1) | FR958808A (h) |
| NL (1) | NL69243C (h) |
-
1946
- 1946-11-07 NL NL128634A patent/NL69243C/nl active
-
1947
- 1947-12-27 BE BE478763A patent/BE478763A/nl unknown
- 1947-12-30 FR FR958808D patent/FR958808A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE478763A (h) | 1948-01-31 |
| NL69243C (h) | 1951-12-16 |