GB673579A - Improvements in and relating to pit-props - Google Patents
Improvements in and relating to pit-propsInfo
- Publication number
- GB673579A GB673579A GB17589/50A GB1758950A GB673579A GB 673579 A GB673579 A GB 673579A GB 17589/50 A GB17589/50 A GB 17589/50A GB 1758950 A GB1758950 A GB 1758950A GB 673579 A GB673579 A GB 673579A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- prop
- pressure
- rings
- space
- 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
- 239000012530 fluid Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000005086 pumping Methods 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
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
- E21D15/445—Hydraulic, pneumatic, or hydraulic-pneumatic props comprising a fluid cushion
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)
- Pressure Vessels And Lids Thereof (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
673,579. Fluid pressure jacks. GUTEHOFFNUNGSHUTTE OBERHAUSEN AKT.-GES. July 13, 1950. [July 13, 1949] No. 17589/50. Class 78 (iii). [Also in Group X] A two-part fluid pressure pit prop has an inflatable vessel 7, Fig. 1. of rubber or like material located between abutments 6, 3 on the upper and lower prop parts and a storage space 8 in the lower part from which the pressure mediutn is driven into the vessel 7. The space 8 is connected with the vessel 7 by tubes 9, 10, via a pump 11 with an adjustable stop valve. Where the pressure medium is water only, it is pumped into the vessel 7 by operating the pump 11 by means of a removable lever arm. Alternatively compressed air may be forced into the space 8 through a valve 12, thus driving the water into the vessel 7 to cause the prop head to abut against the roof, and the final loading of the prop may be produced by subsequent pumping. As another alternative compressed air only, may be used as the pressure medium. To protect the walls of the vessel 7 against abrasion on the inner walls of the prop parts, metal rings 14. Fig. 2, are vulcanized in the wall of the vessel 7 and wire rings 16 around it maintain it in folds under tension when not under pressure and ensure the abutment of the rings 14 against the inner walls of the prop parts.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE673579X | 1949-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB673579A true GB673579A (en) | 1952-06-11 |
Family
ID=6590936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17589/50A Expired GB673579A (en) | 1949-07-13 | 1950-07-13 | Improvements in and relating to pit-props |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB673579A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2985419A (en) * | 1957-04-13 | 1961-05-23 | Mining Engineering Co Ltd | Roof supports for mine workings |
-
1950
- 1950-07-13 GB GB17589/50A patent/GB673579A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2985419A (en) * | 1957-04-13 | 1961-05-23 | Mining Engineering Co Ltd | Roof supports for mine workings |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB673579A (en) | Improvements in and relating to pit-props | |
| US1108952A (en) | Pneumatic jack. | |
| US3344746A (en) | Piston operated pumps for liquid carbon dioxide | |
| GB680310A (en) | Improvements in and relating to pit-props | |
| US2351398A (en) | Hydrovacuumatic balance | |
| GB636568A (en) | Improvements in pit props and other telescopic struts | |
| GB1530318A (en) | Wave-activated generator | |
| GB375937A (en) | Improvements relating to stuffing-boxes for motor driven pumps | |
| GB1407979A (en) | Watergoing craft | |
| FR2456706A1 (en) | Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end | |
| GB197404A (en) | Improvement in construction of double acting air pumps or inflators for pneumatic tyres of motor vehicles | |
| SU478861A1 (en) | Disintegrator for microorganisms | |
| CN208279515U (en) | Device for concrete material immersion processing | |
| GB1153380A (en) | Improvements in and relating to Bore Pump Assemblies. | |
| GB854967A (en) | Improved mine roof supports | |
| GB833044A (en) | Improvements in or relating to pumping plants | |
| SU1195071A1 (en) | Displacement pump | |
| GB787027A (en) | Improvements in or relating to bore hole pump installations | |
| SU43571A1 (en) | Apparatus for automatically maintaining the pressurized elastic chamber of hydraulic system gates in an inflated state | |
| Barkov | Air Admission and Flow Aeration in Hydroturbines | |
| GB743199A (en) | Improvements in hydraulic pit props | |
| GB415187A (en) | Improvements relating to submersible bore-hole pumps | |
| SU512327A1 (en) | Valve | |
| SU70687A1 (en) | Packer installation method when working with submersible hydraulic or pneumatic pumps | |
| CN110386766A (en) | Device for concrete material immersion processing |