FR2164761B3 - - Google Patents
Info
- Publication number
- FR2164761B3 FR2164761B3 FR7316901A FR7316901A FR2164761B3 FR 2164761 B3 FR2164761 B3 FR 2164761B3 FR 7316901 A FR7316901 A FR 7316901A FR 7316901 A FR7316901 A FR 7316901A FR 2164761 B3 FR2164761 B3 FR 2164761B3
- 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
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/08—Advancing mechanisms
- E21D23/081—Advancing mechanisms forming parts of the roof supports
- E21D23/082—Advancing mechanisms forming parts of the roof supports acting solely on the elements of the supports
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (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 |
---|---|---|---|
GB2222172 | 1972-05-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2164761A1 FR2164761A1 (fr) | 1973-08-03 |
FR2164761B3 true FR2164761B3 (fr) | 1978-06-30 |
Family
ID=10175888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7316901A Expired FR2164761B3 (fr) | 1972-05-11 | 1973-05-10 |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2164761B3 (fr) |
-
1973
- 1973-05-10 FR FR7316901A patent/FR2164761B3/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2164761A1 (fr) | 1973-08-03 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |