FR1140899A - Improvements to metal props in several elements - Google Patents
Improvements to metal props in several elementsInfo
- Publication number
- FR1140899A FR1140899A FR1140899DA FR1140899A FR 1140899 A FR1140899 A FR 1140899A FR 1140899D A FR1140899D A FR 1140899DA FR 1140899 A FR1140899 A FR 1140899A
- Authority
- FR
- France
- Prior art keywords
- several elements
- metal props
- props
- metal
- several
- 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
- 239000002184 metal Substances 0.000 title 1
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
-
- 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
- E21D15/38—Telescopic props with parts held relatively to each other by friction or gripping with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1140899X | 1954-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1140899A true FR1140899A (en) | 1957-08-20 |
Family
ID=7726555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1140899D Expired FR1140899A (en) | 1954-12-13 | 1955-12-07 | Improvements to metal props in several elements |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1140899A (en) |
-
1955
- 1955-12-07 FR FR1140899D patent/FR1140899A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR1145146A (en) | Improvements in calculating mechanisms | |
FR1199332A (en) | Improvements to construction elements | |
FR1104889A (en) | Improvement in rotary kilns | |
FR1140899A (en) | Improvements to metal props in several elements | |
FR1230119A (en) | Improvements to beams and construction elements | |
FR1109585A (en) | Improvements to metal roofs in pre-formed elements | |
FR1105590A (en) | Removable metal frame | |
FR1109246A (en) | Improvement in valves | |
FR1112579A (en) | Improvements to metal covers | |
FR1142390A (en) | Improvements to crushers | |
FR1133749A (en) | metal prop in several parts | |
FR1121527A (en) | Improvement in turbomachines | |
FR1150499A (en) | Development in props | |
FR1094426A (en) | Improvements to constructions in prefabricated elements | |
FR1122628A (en) | Improvements to metal roof elements | |
FR1137228A (en) | Improvements to elements modifying reactance | |
FR1120695A (en) | Improvement in construction elements | |
FR67475E (en) | multi-piece mine prop | |
FR1114074A (en) | Improvement in Dinsonian roofs | |
FR1113490A (en) | Improvements to metal windows | |
FR1117702A (en) | Removable construction and its constituent elements | |
FR1125738A (en) | Improvements to crushers | |
FR1127030A (en) | Improvements to metallurgical briquettes | |
FR1130973A (en) | Watch improvement | |
FR1137595A (en) | Improvements to discriminators |