GB956482A - A hydraulic pit prop - Google Patents
A hydraulic pit propInfo
- Publication number
- GB956482A GB956482A GB2709261A GB2709261A GB956482A GB 956482 A GB956482 A GB 956482A GB 2709261 A GB2709261 A GB 2709261A GB 2709261 A GB2709261 A GB 2709261A GB 956482 A GB956482 A GB 956482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydraulic pit
- head
- props
- pit prop
- see figs
- 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
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification 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
-
- 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
- E21D15/48—Chocks or the like
- E21D15/486—Chocks or the like with essential hydraulic or pneumatic details
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)
- Forging (AREA)
- Reciprocating Pumps (AREA)
Abstract
956,482. Hydraulic pit props. BWG BERGWERK-UND WALZWERK-MASCHINENBAU G.m.b.H. July 26, 1961 [Aug. 5, 1960], No. 27092/61. Heading E1E. An hydraulic pit prop comprises head and sole plates 3, 4 mounted on pistons 2 adapted to be urged apart by fluid admitted to a common cylinder 1 having inlet and discharge valves 5, 6 respectively. In a modification, the opposed pistons slide one within the other, see Figs. 3 and 4 (not shown). Again the head and sole plates may be mounted on the piston rod as opposed to the piston head, see Figs. 5 and 6 (not shown). Two such props may be placed one on top of the other to form a unit, see Fig. 7 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB58882A DE1152376B (en) | 1960-08-05 | 1960-08-05 | Hydraulic pit ram with enlarged stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB956482A true GB956482A (en) | 1964-04-29 |
Family
ID=6972244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2709261A Expired GB956482A (en) | 1960-08-05 | 1961-07-26 | A hydraulic pit prop |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE605945A (en) |
| DE (1) | DE1152376B (en) |
| GB (1) | GB956482A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2329428A (en) * | 1997-09-20 | 1999-03-24 | Joy Mining Machinery Limited | Improvements in and relating to a hydraulic control system |
| GB2370319A (en) * | 2000-11-18 | 2002-06-26 | Passenger Lift Services Ltd | Single-feed tandem cylinder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5690315A (en) * | 1996-03-15 | 1997-11-25 | Thomas; Timothy N. | Compact lifter assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2656057A (en) * | 1947-05-08 | 1953-10-20 | Joy Mfg Co | Timber setting machine |
| US2795934A (en) * | 1952-09-30 | 1957-06-18 | Joy Mfg Co | Rotating hydraulic roof supporting jacks |
| US2795935A (en) * | 1952-09-30 | 1957-06-18 | Joy Mfg Co | Walking roof support |
-
1960
- 1960-08-05 DE DEB58882A patent/DE1152376B/en active Pending
-
1961
- 1961-07-10 BE BE605945A patent/BE605945A/en unknown
- 1961-07-26 GB GB2709261A patent/GB956482A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2329428A (en) * | 1997-09-20 | 1999-03-24 | Joy Mining Machinery Limited | Improvements in and relating to a hydraulic control system |
| GB2370319A (en) * | 2000-11-18 | 2002-06-26 | Passenger Lift Services Ltd | Single-feed tandem cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1152376B (en) | 1963-08-08 |
| BE605945A (en) | 1961-11-03 |
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