GB900711A - Hydraulic pit prop - Google Patents
Hydraulic pit propInfo
- Publication number
- GB900711A GB900711A GB3008658A GB3008658A GB900711A GB 900711 A GB900711 A GB 900711A GB 3008658 A GB3008658 A GB 3008658A GB 3008658 A GB3008658 A GB 3008658A GB 900711 A GB900711 A GB 900711A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- outlet
- sleeve valve
- piston
- port
- 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 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
-
- 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
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Reciprocating Pumps (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
900,711. Mine roof supports. VON LINSINGEN, M., [trading as BOCHUMER EISENHUTTE HEINTZMANN & CO.]. Sept. 19, 1958 [Sept. 24, 1957], No. 30086/58. Class 20 (2). [Also in Group XXVIII] An hydraulic pit prop is operated by a reciprocating pump which may be fixed to the prop and operated by a lever pivoted on the prop. The pump comprises a piston 10a slidable within a sleeve valve 19 which is mounted in a housing 8 and adjustable by turning the piston-rod 10 to which it is coupled by a pin 20 (not shown). The sleeve valve 19 is provided with ports 27- 30 and the housing 8 is provided with a valved inlet 16, an outlet 9 to the prop and a pressure release port 17. As shown in Fig. 3, operation of the piston 10a causes the sleeve valve 19 to rise against a spring 22 to bring a port 30 in line with the outlet 9 and supply fluid for the prop. The sleeve valve is adjustable to an inoperative position and to a pressure release position in which ports therein are aligned with the outlet 9 and the port 17. A pressure relief valve is provided in the wall of the outlet 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB46178A DE1155076B (en) | 1957-09-24 | 1957-09-24 | Pressurized, in particular hydraulic, pit ram |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB900711A true GB900711A (en) | 1962-07-11 |
Family
ID=6967857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3008658A Expired GB900711A (en) | 1957-09-24 | 1958-09-19 | Hydraulic pit prop |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE571481A (en) |
| DE (1) | DE1155076B (en) |
| FR (1) | FR1210381A (en) |
| GB (1) | GB900711A (en) |
| NL (1) | NL231514A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB686301A (en) * | 1941-03-29 | 1953-01-21 | Dresser Equipment Company | Improvements in or relating to valve mechanisms and fluid operated motor devices employing said valve mechanisms |
-
0
- NL NL231514D patent/NL231514A/xx unknown
- BE BE571481D patent/BE571481A/xx unknown
-
1957
- 1957-09-24 DE DEB46178A patent/DE1155076B/en active Pending
-
1958
- 1958-09-19 GB GB3008658A patent/GB900711A/en not_active Expired
- 1958-09-23 FR FR1210381D patent/FR1210381A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1155076B (en) | 1963-10-03 |
| BE571481A (en) | |
| FR1210381A (en) | 1960-03-08 |
| NL231514A (en) |
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