GB238779A - Improved telescopic pit prop - Google Patents
Improved telescopic pit propInfo
- Publication number
- GB238779A GB238779A GB260525A GB260525A GB238779A GB 238779 A GB238779 A GB 238779A GB 260525 A GB260525 A GB 260525A GB 260525 A GB260525 A GB 260525A GB 238779 A GB238779 A GB 238779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pit prop
- improved telescopic
- telescopic pit
- prop
- tapered inner
- 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
- 238000012856 packing Methods 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 abstract 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
- E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
- E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring
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)
- Clamps And Clips (AREA)
Abstract
238,779. Mannesmannr÷hrenwerke, and D³nkelberg, K. Jan. 29, 1925. Mine props.-A telescopic mine prop comprising a clamping member engaging a tapered inner member a and resting on an outer member b, is provided with a packing d of compressible material between the clamp c and the outer surface of the tapered inner member, which allows the inner and outer members to telescope under pressure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB260525A GB238779A (en) | 1925-01-29 | 1925-01-29 | Improved telescopic pit prop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB260525A GB238779A (en) | 1925-01-29 | 1925-01-29 | Improved telescopic pit prop |
Publications (1)
Publication Number | Publication Date |
---|---|
GB238779A true GB238779A (en) | 1925-08-27 |
Family
ID=9742504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB260525A Expired GB238779A (en) | 1925-01-29 | 1925-01-29 | Improved telescopic pit prop |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB238779A (en) |
-
1925
- 1925-01-29 GB GB260525A patent/GB238779A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR1319925A (en) | Improvements made to the pistons of pressurized fluid cylinders, more specifically to the pistons of hydraulic props for mines | |
GB238779A (en) | Improved telescopic pit prop | |
BE617587A (en) | Sealing of pressure vessels. | |
GB281335A (en) | Improvements in hydraulic presses | |
FR1033792A (en) | Key that can be used with a butane gas cylinder or the like | |
FR880347A (en) | flexible mine shoring | |
FR873073A (en) | Pressure pencil with two pliers | |
GB244654A (en) | Props for mines | |
GB323851A (en) | Steel pit prop | |
FR1381298A (en) | Hydraulic pressure seal | |
GB325814A (en) | Improved coupling for armoured hosepipe | |
GB968810A (en) | Improvements relating to props for use in mining | |
GB249678A (en) | Improvements in struts, props or jacks for use in trenches, mines and other places | |
FR1284609A (en) | High pressure hydraulic cylinder with incorporated multiplier | |
GB767179A (en) | Telescopic pit prop | |
DE6601422U (en) | HIGH PRESSURE HOSE | |
GR22715B (en) | OIL PRESSURE PRESSURE PRESS. | |
FR1258308A (en) | Advanced swivel sleeve connection for high pressure piping | |
FR1297442A (en) | Pressure ratio detector | |
BE592927A (en) | Pressure relief valve for hydraulic mine props. | |
FR1318182A (en) | High pressure pneumatic transmitter | |
GB319066A (en) | Telescopic steel pit prop | |
FR1268591A (en) | Multiple pressure relief valve for hydraulic mine props | |
FR1204965A (en) | High pressure oil burner improvements | |
DK99778C (en) | Pressure sleeve with working piston. |