GB802804A - Improvements in or relating to hydraulic pit props - Google Patents
Improvements in or relating to hydraulic pit propsInfo
- Publication number
- GB802804A GB802804A GB35219/55A GB3521955A GB802804A GB 802804 A GB802804 A GB 802804A GB 35219/55 A GB35219/55 A GB 35219/55A GB 3521955 A GB3521955 A GB 3521955A GB 802804 A GB802804 A GB 802804A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- hydraulic
- hydraulic pit
- mastabar
- high pressure
- 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
- 238000005065 mining Methods 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
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/18—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the effective cross-section of the working surface of the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Actuator (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
802,804. Hydraulic pit prop. MASTABAR MINING EQUIPMENT CO., Ltd., [formerly MASTABAR BELT FASTENING CO., Ltd.]. Nov. 21, 1955 [Dec. 8, 1955], No. 35219/55. Class 20(2) An hydraulic pit prop has a two-stage pump providing rapid extension for loading followed by setting under high pressure. Operation of shaft 31 reciprocates pistons 25 and 22 together so as to raise upper prop 17 by pumping oil from the reservoir into the space 50. After extension the hydraulic pressure allows the high pressure piston 25 to set the prop under load. External adjustment of eye 71 controls the collapse of the prop via torsion bow spring 61 as described in Specification 802,803.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE553228D BE553228A (en) | 1955-12-08 | ||
GB35219/55A GB802804A (en) | 1955-12-08 | 1955-12-08 | Improvements in or relating to hydraulic pit props |
DEM32499A DE1054402B (en) | 1955-12-08 | 1956-11-29 | Hydraulic pit support |
FR1164647D FR1164647A (en) | 1955-12-08 | 1956-12-06 | Two-stage pump for hydraulic prop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB35219/55A GB802804A (en) | 1955-12-08 | 1955-12-08 | Improvements in or relating to hydraulic pit props |
Publications (1)
Publication Number | Publication Date |
---|---|
GB802804A true GB802804A (en) | 1958-10-15 |
Family
ID=10375225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35219/55A Expired GB802804A (en) | 1955-12-08 | 1955-12-08 | Improvements in or relating to hydraulic pit props |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE553228A (en) |
DE (1) | DE1054402B (en) |
FR (1) | FR1164647A (en) |
GB (1) | GB802804A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307021A (en) * | 2019-07-29 | 2019-10-08 | 石家庄博安煤矿机械制造有限公司 | A kind of coal mine hydraulic support device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB962542A (en) * | 1959-08-21 | 1964-07-01 | Acrow Eng Ltd | Improvements in and relating to hydraulic props |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE526791A (en) * | 1953-02-25 | |||
NL92057C (en) * | 1953-09-24 | 1900-01-01 |
-
0
- BE BE553228D patent/BE553228A/xx unknown
-
1955
- 1955-12-08 GB GB35219/55A patent/GB802804A/en not_active Expired
-
1956
- 1956-11-29 DE DEM32499A patent/DE1054402B/en active Pending
- 1956-12-06 FR FR1164647D patent/FR1164647A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307021A (en) * | 2019-07-29 | 2019-10-08 | 石家庄博安煤矿机械制造有限公司 | A kind of coal mine hydraulic support device |
CN110307021B (en) * | 2019-07-29 | 2024-01-12 | 石家庄博安煤矿机械制造有限公司 | Hydraulic supporting device for coal mine |
Also Published As
Publication number | Publication date |
---|---|
FR1164647A (en) | 1958-10-13 |
DE1054402B (en) | 1959-04-09 |
BE553228A (en) |
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