BE553227A - - Google Patents
Info
- Publication number
- BE553227A BE553227A BE553227DA BE553227A BE 553227 A BE553227 A BE 553227A BE 553227D A BE553227D A BE 553227DA BE 553227 A BE553227 A BE 553227A
- Authority
- BE
- Belgium
Links
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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/22—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure
-
- 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
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/30—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
- E21D15/306—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber by means of a liquid
-
- 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
- E21D15/14—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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Control Of Presses (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Emergency Lowering Means (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
- Actuator (AREA)
- Safety Valves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB16827/55A GB793803A (en) | 1955-06-10 | 1955-06-10 | Improvements in or relating to props, especially for use in coal mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE553227A true BE553227A (US06653308-20031125-C00057.png) |
Family
ID=10084401
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE553227D BE553227A (US06653308-20031125-C00057.png) | 1955-06-10 | ||
| BE548513D BE548513A (US06653308-20031125-C00057.png) | 1955-06-10 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE548513D BE548513A (US06653308-20031125-C00057.png) | 1955-06-10 |
Country Status (5)
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB894292A (en) * | 1957-07-30 | 1962-04-18 | Mastabar Mining Equip Co Ltd | Improvements in or relating to hydraulic props, particularly pit props |
| GB898987A (en) * | 1960-04-19 | 1962-06-20 | Mastabar Mining Equip Co Ltd | Improvements in or relating to hydraulic supports |
| US3112705A (en) * | 1961-10-05 | 1963-12-03 | Jane Wallen | Two-speed hydraulic pumps |
| BE638885A (US06653308-20031125-C00057.png) * | 1962-10-19 | |||
| US3394634A (en) * | 1966-10-21 | 1968-07-30 | George M. Pfundt | Internal relief valve for hydrauli cally actuated pole pullers |
| US3476019A (en) * | 1967-09-08 | 1969-11-04 | Berg Mfg & Sales Co | Air-assisted emergency spring brake assembly |
| FR2976058B1 (fr) | 2011-05-30 | 2013-07-05 | Prestige Solaire | Systeme motorise d'entrainement en rotation pour un systeme de support suiveur pour capteur solaire |
| CN111594235B (zh) * | 2020-04-22 | 2021-06-18 | 山东科技大学 | 一种缓冲式矿用支护设备及支护方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2618122A (en) * | 1946-04-18 | 1952-11-18 | Gratzmuller Jean Louis | Telescopic hydraulic jack |
| GB636568A (en) * | 1953-07-20 | 1950-05-03 | George Herbert Dowty | Improvements in pit props and other telescopic struts |
| BE486663A (US06653308-20031125-C00057.png) * | 1948-01-12 | |||
| GB640414A (en) * | 1948-03-06 | 1950-07-19 | Mavor & Coulson Ltd | Improvements in props |
| DE928945C (de) * | 1951-06-09 | 1955-06-16 | Eisenwerk Wanheim G M B H | Verstellbarer hydraulischer Grubenstempel |
| GB700790A (en) * | 1951-07-19 | 1953-12-09 | Dowty Auto Units Ltd | Improvements relating to valves |
| DE950183C (de) * | 1953-02-26 | 1956-10-04 | August Bilstein G M B H | Hydraulische Hubvorrichtung, insbesondere zum Setzen von Grubenstempeln |
| NL191038A (US06653308-20031125-C00057.png) * | 1953-09-24 | 1900-01-01 |
-
0
- BE BE553227D patent/BE553227A/xx unknown
- BE BE548513D patent/BE548513A/xx unknown
-
1955
- 1955-06-10 GB GB16827/55A patent/GB793803A/en not_active Expired
- 1955-12-08 GB GB35218/55A patent/GB802803A/en not_active Expired
-
1956
- 1956-06-08 FR FR1151305D patent/FR1151305A/fr not_active Expired
- 1956-06-08 US US590185A patent/US2895454A/en not_active Expired - Lifetime
- 1956-06-09 DE DEM30743A patent/DE1063554B/de active Pending
- 1956-11-29 DE DEM32498A patent/DE1064907B/de active Pending
- 1956-12-06 FR FR1162002D patent/FR1162002A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE548513A (US06653308-20031125-C00057.png) | |
| FR1162002A (fr) | 1958-09-08 |
| GB793803A (en) | 1958-04-23 |
| US2895454A (en) | 1959-07-21 |
| DE1064907B (de) | 1959-09-10 |
| DE1063554B (de) | 1959-08-20 |
| FR1151305A (fr) | 1958-01-29 |
| GB802803A (en) | 1958-10-15 |
