BE508251A - - Google Patents
Info
- Publication number
- BE508251A BE508251A BE508251DA BE508251A BE 508251 A BE508251 A BE 508251A BE 508251D A BE508251D A BE 508251DA BE 508251 A BE508251 A BE 508251A
- Authority
- BE
- Belgium
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
-
- 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
- E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE720106X | 1951-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE508251A true BE508251A (xx) |
Family
ID=6627507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE508251D BE508251A (xx) | 1951-01-05 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE508251A (xx) |
| GB (1) | GB720106A (xx) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1132072B (de) * | 1957-08-10 | 1962-06-28 | Gewerk Eisenhuette Westfalia | Vorrichtung zur Steuerung hydraulischer Ausbaurahmen |
| DE1168373B (de) * | 1957-11-20 | 1964-04-23 | Kloeckner Werke Ag | Hydraulisches Ausbaugespann |
| CN115653692B (zh) * | 2022-12-09 | 2023-04-07 | 陕西欧亚桥能源科技有限公司 | 一种煤矿用自动报警装置 |
-
0
- BE BE508251D patent/BE508251A/xx unknown
-
1952
- 1952-01-02 GB GB112/52A patent/GB720106A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB720106A (en) | 1954-12-15 |