NL256743A - - Google Patents
Info
- Publication number
- NL256743A NL256743A NL256743DA NL256743A NL 256743 A NL256743 A NL 256743A NL 256743D A NL256743D A NL 256743DA NL 256743 A NL256743 A NL 256743A
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith
-
- 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34500/59A GB967164A (en) | 1959-10-12 | 1959-10-12 | Mine roof support systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL256743A true NL256743A (xx) |
Family
ID=10366423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL256743D NL256743A (xx) | 1959-10-12 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3216201A (xx) |
| DE (1) | DE1251256B (xx) |
| GB (1) | GB967164A (xx) |
| NL (1) | NL256743A (xx) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1065881A (en) * | 1963-03-08 | 1967-04-19 | Coal Ind | Mine roof support remote control systems |
| GB1016061A (en) * | 1963-04-04 | 1966-01-05 | Dowty Technical Dev Ltd | Mine roof support |
| GB1038262A (en) * | 1964-02-04 | 1966-08-10 | Gullick Ltd | Improvements in or relating to advancing hydraulic mine roof and like supports |
| BE697578A (xx) * | 1966-05-14 | 1967-10-02 | ||
| DE1583080A1 (de) * | 1966-10-14 | 1970-04-23 | Dowty Mining Equipment Ltd | Grubendeckenausbau |
| DE1290505B (de) * | 1967-03-30 | 1969-03-13 | Bergwerksverband Gmbh | Einrichtung zur Zeitplansteuerung von hydraulischem Grubenausbau |
| US3505823A (en) * | 1967-07-19 | 1970-04-14 | Gunter Bell | Hydraulic support systems for mine workings |
| US3601998A (en) * | 1969-02-19 | 1971-08-31 | Wild A G & Co Ltd | Control of mine roof support assemblies |
| GB1261110A (en) * | 1969-03-26 | 1972-01-19 | Gullick Dobson Ltd | Improvements in or relating to fluidic logic controlled hydraulic mine roof support systems |
| GB1571503A (en) * | 1976-01-24 | 1980-07-16 | Dowty Mining Equipment Ltd | Longwall mining apparatus |
| AU8549282A (en) * | 1981-07-16 | 1983-01-20 | Dowty Mining Equipment Ltd. | Hydraulically operated mine roof support |
| EP2378060B1 (en) * | 2010-04-16 | 2012-12-05 | S.A. Armstrong Limited | Improvements in and Relating to Long Wall Hydraulic Supply Systems |
| CN102635382A (zh) * | 2011-02-12 | 2012-08-15 | 淮南矿业(集团)有限责任公司 | 煤矿悬移支架调架工具 |
| US11512717B2 (en) * | 2019-03-15 | 2022-11-29 | Yanming Wei | Digital-switching fluidic power supply and hydrostatic transmission with regenerative brake |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2301028A (en) * | 1940-07-27 | 1942-11-03 | Vickers Inc | Power transmission |
| US2698517A (en) * | 1952-05-21 | 1955-01-04 | Kenneth F Witt | Automatic means to control and reverse fluid-operated cylinder-and-piston units |
| GB781643A (en) * | 1954-04-12 | 1957-08-21 | Klockner Bergbau Victor Ickern | Mobile system of mine roof support |
| GB823128A (en) * | 1955-02-23 | 1959-11-04 | Dowty Mining Equipment Ltd | Improvements in and relating to mine roof support systems |
| FR1190532A (fr) * | 1957-07-05 | 1959-10-13 | Dobson Ltd W E & F | Perfectionnements apportés aux supports de plafonds pour mines souterraines |
-
0
- NL NL256743D patent/NL256743A/xx unknown
- DE DENDAT1251256D patent/DE1251256B/de active Pending
-
1959
- 1959-10-12 GB GB34500/59A patent/GB967164A/en not_active Expired
-
1960
- 1960-10-07 US US61210A patent/US3216201A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB967164A (en) | 1964-08-19 |
| DE1251256B (de) | 1967-10-05 |
| US3216201A (en) | 1965-11-09 |