DE645813C - - Google Patents
Info
- Publication number
- DE645813C DE645813C DENDAT645813D DE645813DA DE645813C DE 645813 C DE645813 C DE 645813C DE NDAT645813 D DENDAT645813 D DE NDAT645813D DE 645813D A DE645813D A DE 645813DA DE 645813 C DE645813 C DE 645813C
- Authority
- DE
- Germany
- Prior art keywords
- teeth
- pawl
- support
- hook
- hook pawl
- 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.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/20—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like, spaced apart at intervals
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)
- Catching Or Destruction (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE645813C true DE645813C (enrdf_load_stackoverflow) |
Family
ID=576899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT645813D Active DE645813C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE645813C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT645813D patent/DE645813C/de active Active
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