GB1026136A - Hydraulic pit prop with extended lift - Google Patents
Hydraulic pit prop with extended liftInfo
- Publication number
- GB1026136A GB1026136A GB420563A GB420563A GB1026136A GB 1026136 A GB1026136 A GB 1026136A GB 420563 A GB420563 A GB 420563A GB 420563 A GB420563 A GB 420563A GB 1026136 A GB1026136 A GB 1026136A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydraulic pit
- prop
- feb
- piston
- housing
- 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 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
Abstract
1,026,136. Hydraulic pit props. B W G BERGWERK-UND WALZWERK-MASCHINENBAU G.m.b.H. Feb. 1, 1963 [Feb. 3, 1962], No. 4205/63. Heading E1E. An hydraulic pit prop has a piston 2 of annular cross-section and a piston 3 of circular crosssection interpenetrating concentrically from below and above a common pressure chamber 1. The pistons are of substantially equal area and are acted on by liquid from a filling valve 22, mounted in an upper collar 5 on the chamber 1, passing through ducts 24, 14, 15, and 18 to expand the prop, which is retracted by springs 10, 11. The housing for the filling valve 22 also contains a relief valve 23 and a release valve 21 operated by a spindle 25, the housing being closed by a swivelling handle 20.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB65799A DE1207317B (en) | 1962-02-03 | 1962-02-03 | Hydraulic pit ram with enlarged stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1026136A true GB1026136A (en) | 1966-04-14 |
Family
ID=6974913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB420563A Expired GB1026136A (en) | 1962-02-03 | 1963-02-01 | Hydraulic pit prop with extended lift |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE627891A (en) |
| DE (1) | DE1207317B (en) |
| GB (1) | GB1026136A (en) |
| NL (1) | NL278544A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2941168A1 (en) * | 1979-10-11 | 1981-04-23 | Thyssen Industrie Ag, 4300 Essen | Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution |
| DE10241801A1 (en) | 2002-09-06 | 2004-03-18 | Dbt Gmbh | Process for joining the functional parts of hydraulic or pneumatic working devices and joining connection |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE1810715U (en) * | 1956-02-20 | 1960-05-05 | Gutehoffnungshuette Sterkrade | HYDRAULIC PIT STAMP. |
| DE1747411U (en) * | 1957-03-23 | 1957-06-27 | Kloeckner Bergbau Victor Icker | HYDRAULIC PIT STAMP. |
| DE1024463B (en) * | 1957-04-18 | 1958-02-20 | Karl Gerlach | Hydraulic pit ram |
-
0
- BE BE627891D patent/BE627891A/xx unknown
- NL NL278544D patent/NL278544A/xx unknown
-
1962
- 1962-02-03 DE DEB65799A patent/DE1207317B/en active Pending
-
1963
- 1963-02-01 GB GB420563A patent/GB1026136A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE627891A (en) | |
| DE1207317B (en) | 1965-12-23 |
| NL278544A (en) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1126940A (en) | A multi-stage telescopic hydraulic pit prop | |
| GB864032A (en) | Improvements relating to hydraulic pit props or the like | |
| GB1026136A (en) | Hydraulic pit prop with extended lift | |
| GB977800A (en) | Improvements in or relating to mine roof supports | |
| GB843354A (en) | Improvements in hydraulically operated supporting devices | |
| GB959080A (en) | Improvements in or relating to a hydro-pneumatic prop | |
| GB927765A (en) | Improvements in or relating to telescopic hydraulic pit props | |
| GB900383A (en) | Improvements in or relating to auxiliary hoists | |
| GB866239A (en) | Improvements in or relating to pit props | |
| GB894292A (en) | Improvements in or relating to hydraulic props, particularly pit props | |
| GB822161A (en) | Improvements in or relating to hydraulic pit props and liquid supply systems therefor | |
| GB970917A (en) | Hydraulic pit prop | |
| GB882802A (en) | Improvements in and relating to telescopic hydraulic pit-prop | |
| GB846783A (en) | Improvements in or relating to mine supports | |
| GB853492A (en) | Hydraulic presses | |
| GB1001412A (en) | Roof supports suitable for use in mines | |
| GB933136A (en) | A piston seal for hydraulic pit-props | |
| GB743199A (en) | Improvements in hydraulic pit props | |
| GB877345A (en) | A hydraulic pit-prop | |
| GB954660A (en) | Hydraulic pit prop | |
| GB1236444A (en) | Fluid actuated valve | |
| GB1413112A (en) | Hydraulic valve | |
| GB972317A (en) | Improvements in or relating to telescopic pit props | |
| GB898987A (en) | Improvements in or relating to hydraulic supports | |
| GB1046419A (en) | Improvements in and relating to hydraulic pit props |