GB707051A - Improvements in or relating to pit props and like supports - Google Patents
Improvements in or relating to pit props and like supportsInfo
- Publication number
- GB707051A GB707051A GB2653550A GB2653550A GB707051A GB 707051 A GB707051 A GB 707051A GB 2653550 A GB2653550 A GB 2653550A GB 2653550 A GB2653550 A GB 2653550A GB 707051 A GB707051 A GB 707051A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reservoir
- cylinder
- pump
- valve
- operated
- 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
- 230000004048 modification Effects 0.000 abstract 3
- 238000012986 modification Methods 0.000 abstract 3
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 abstract 1
- 108700017836 Prophet of Pit-1 Proteins 0.000 abstract 1
- 239000012530 fluid Substances 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
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
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)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
707,051. Hydraulic jacks. LAKE & ELLIOTT, Ltd., GILBERT, G., and NEWMAN, J. Oct. 16, 1951 [Oct. 31, 1950], No. 26535/50. Class 78 (3) [Also in Group X] In an hydraulically operated unit for attachment to a pit prop comprising a cylinder 4 in which works a piston 3, a reservoir 5, a pump plunger 31 operated by a rocker arm 20 and operating through inlet and outlet valves 37, 40 to supply fluid from the reservoir to the cylinder, a manual screwoperated release valve 46 for the cylinder and a supporting head 6 engaging the mine roof, part of the unit, either the cylinder or reservoir, is mounted within the end of the pit prop 1. In Fig. 1 the pump is contained in the piston 3, but in other modifications it is contained in the reservoir. In both cases modifications are shown with two pump plungers operated alternately by a double rocker arm, each plunger having its own inlet and outlet valves or with one plunger only. In the modification having the pump in the reservoir, the head 6 is supported directly by the piston 3 in the cylinder 4 which is above the reservoir 5. When the valve 46 is to be operated from a distance it is arranged to be closed by a spring bearing on the valve by means of a flanged sleeve which is adapted to be moved to compress the spring, to allow the valve to open, by a cord from a distance operating a lever acting on the handle 49 which may also be turned to compress the spring by screw means. Specification 701,446 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2653550A GB707051A (en) | 1950-10-31 | 1950-10-31 | Improvements in or relating to pit props and like supports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2653550A GB707051A (en) | 1950-10-31 | 1950-10-31 | Improvements in or relating to pit props and like supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB707051A true GB707051A (en) | 1954-04-14 |
Family
ID=10245165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2653550A Expired GB707051A (en) | 1950-10-31 | 1950-10-31 | Improvements in or relating to pit props and like supports |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB707051A (en) |
-
1950
- 1950-10-31 GB GB2653550A patent/GB707051A/en not_active Expired
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