NL66234C - - Google Patents
Info
- Publication number
- NL66234C NL66234C NL66234DA NL66234C NL 66234 C NL66234 C NL 66234C NL 66234D A NL66234D A NL 66234DA NL 66234 C NL66234 C NL 66234C
- Authority
- NL
- Netherlands
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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0008—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a pair of joined struts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25279/44A GB584220A (en) | 1944-12-16 | 1944-12-16 | Improvements in roof supports for use in mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL66234C true NL66234C (xx) |
Family
ID=10225137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL66234D NL66234C (xx) | 1944-12-16 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE471022A (xx) |
| FR (1) | FR940432A (xx) |
| GB (1) | GB584220A (xx) |
| NL (1) | NL66234C (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2795934A (en) * | 1952-09-30 | 1957-06-18 | Joy Mfg Co | Rotating hydraulic roof supporting jacks |
| FR2039523A5 (xx) * | 1969-04-02 | 1971-01-15 | Devars Naudo Et Cie |
-
0
- NL NL66234D patent/NL66234C/xx active
- BE BE471022D patent/BE471022A/xx unknown
-
1944
- 1944-12-16 GB GB25279/44A patent/GB584220A/en not_active Expired
-
1947
- 1947-02-10 FR FR940432D patent/FR940432A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE471022A (xx) | |
| FR940432A (fr) | 1948-12-13 |
| GB584220A (en) | 1947-01-09 |