NL75535C - - Google Patents
Info
- Publication number
- NL75535C NL75535C NL153551A NL153551A NL75535C NL 75535 C NL75535 C NL 75535C NL 153551 A NL153551 A NL 153551A NL 153551 A NL153551 A NL 153551A NL 75535 C NL75535 C NL 75535C
- Authority
- NL
- Netherlands
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
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)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2741250A GB688782A (en) | 1950-11-09 | 1950-11-09 | Improvements in steel roof-shoring devices in mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL75535C true NL75535C (it) | 1954-03-15 |
Family
ID=10259148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL153551A NL75535C (it) | 1950-11-09 | 1950-05-15 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE495485A (it) |
| DE (1) | DE826909C (it) |
| FR (2) | FR994556A (it) |
| GB (1) | GB688782A (it) |
| NL (1) | NL75535C (it) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2884272A (en) * | 1955-01-19 | 1959-04-28 | Hans Gerlach | Roof support structure for mine workings |
| US2909253A (en) * | 1956-03-02 | 1959-10-20 | Hinze Otto | Adjustable girder |
| DE1127844B (de) * | 1956-03-12 | 1962-04-19 | Karl Gerlach | Schwenkkappe fuer den Grubenausbau |
| DE1165528B (de) * | 1960-10-25 | 1964-03-19 | Alexander Schmidt Grubenausbau | Gelenkige Blattfederkappenverbindung |
| CN109026109B (zh) * | 2018-10-09 | 2023-11-28 | 中国矿业大学(北京) | 综放开采智能放煤机构 |
-
1949
- 1949-07-08 FR FR994556D patent/FR994556A/fr not_active Expired
-
1950
- 1950-04-18 FR FR60222D patent/FR60222E/fr not_active Expired
- 1950-05-03 BE BE495485D patent/BE495485A/xx unknown
- 1950-05-15 NL NL153551A patent/NL75535C/xx active
- 1950-05-24 DE DE1950A0001689 patent/DE826909C/de not_active Expired
- 1950-11-09 GB GB2741250A patent/GB688782A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR60222E (fr) | 1954-10-12 |
| FR994556A (fr) | 1951-11-19 |
| BE495485A (it) | 1950-09-01 |
| GB688782A (en) | 1953-03-11 |
| DE826909C (de) | 1952-01-07 |