GB970917A - Hydraulic pit prop - Google Patents
Hydraulic pit propInfo
- Publication number
- GB970917A GB970917A GB4385762A GB4385762A GB970917A GB 970917 A GB970917 A GB 970917A GB 4385762 A GB4385762 A GB 4385762A GB 4385762 A GB4385762 A GB 4385762A GB 970917 A GB970917 A GB 970917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydraulic pit
- valve
- pit prop
- pressure chamber
- hydraulic
- 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
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
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)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Safety Valves (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
970,917. Hydraulic pit props. H. J. RHEINBAY. Nov. 20, 1962, No. 43857/62. Heading E1E. In an hydraulic pit prop having a charging valve 12 and a combined relief/release valve 13 the valves are mounted in a common disconnectable housing 8 having a base 9 disposed transverse to that of the axis of the pressure chamber and communicating therewith by a T-connection as shown, the valve 13 controlling communication between the pressure chamber and an annular chamber 16 having a vent 17.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR915879A FR1345213A (en) | 1962-11-19 | 1962-11-19 | hydraulic prop for mines |
GB4385762A GB970917A (en) | 1962-11-20 | 1962-11-20 | Hydraulic pit prop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4385762A GB970917A (en) | 1962-11-20 | 1962-11-20 | Hydraulic pit prop |
Publications (1)
Publication Number | Publication Date |
---|---|
GB970917A true GB970917A (en) | 1964-09-23 |
Family
ID=10430619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4385762A Expired GB970917A (en) | 1962-11-19 | 1962-11-20 | Hydraulic pit prop |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB970917A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3426995A (en) * | 1965-12-22 | 1969-02-11 | Allinquant Fernand St | Hydraulic pit prop |
FR2474112A1 (en) * | 1980-01-21 | 1981-07-24 | Commercial Shearing | LONG-HOLE CYLINDER THAT CAN SERVE MINE ROOF SUPPORT |
-
1962
- 1962-11-20 GB GB4385762A patent/GB970917A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3426995A (en) * | 1965-12-22 | 1969-02-11 | Allinquant Fernand St | Hydraulic pit prop |
FR2474112A1 (en) * | 1980-01-21 | 1981-07-24 | Commercial Shearing | LONG-HOLE CYLINDER THAT CAN SERVE MINE ROOF SUPPORT |
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