GB1553682A - Pressure-reducing valve for providing a two-stage telescopic hydraulic pit stop - Google Patents

Pressure-reducing valve for providing a two-stage telescopic hydraulic pit stop

Info

Publication number
GB1553682A
GB1553682A GB3451876A GB3451876A GB1553682A GB 1553682 A GB1553682 A GB 1553682A GB 3451876 A GB3451876 A GB 3451876A GB 3451876 A GB3451876 A GB 3451876A GB 1553682 A GB1553682 A GB 1553682A
Authority
GB
United Kingdom
Prior art keywords
providing
pressure
reducing valve
telescopic hydraulic
stage telescopic
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
Application number
GB3451876A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saarbergwerke AG
Original Assignee
Saarbergwerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saarbergwerke AG filed Critical Saarbergwerke AG
Publication of GB1553682A publication Critical patent/GB1553682A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Control Of Presses (AREA)
  • Safety Valves (AREA)
GB3451876A 1975-08-23 1976-08-19 Pressure-reducing valve for providing a two-stage telescopic hydraulic pit stop Expired GB1553682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752537715 DE2537715C3 (en) 1975-08-23 1975-08-23 Pressure reducing valve arrangement and design for the connection of the two pressure chambers of a two-stage telescopic pit ram

Publications (1)

Publication Number Publication Date
GB1553682A true GB1553682A (en) 1979-09-26

Family

ID=5954757

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3451876A Expired GB1553682A (en) 1975-08-23 1976-08-19 Pressure-reducing valve for providing a two-stage telescopic hydraulic pit stop

Country Status (3)

Country Link
DE (1) DE2537715C3 (en)
FR (1) FR2322319A1 (en)
GB (1) GB1553682A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA804072B (en) * 1979-08-07 1981-06-24 Dobson Park Ind Telescoping jack
GB2176845B (en) * 1985-06-21 1989-04-26 600 Group Plc The Improvements in telescopic devices such as crane jibs
US4834135A (en) * 1988-11-01 1989-05-30 Sun Hydraulics Corp. Pressure control valve

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2359017A (en) * 1942-03-04 1944-09-26 Landis Tool Co Relief valve
DE932784C (en) * 1949-12-28 1955-09-08 Doering G M B H Hydraulic pit ram with compressed air operation
FR1112062A (en) * 1954-04-12 1956-03-08 Klockner Bergbau Victor Ickern Installation for progressive support for the advancement of underground or similar works
GB882802A (en) * 1958-09-09 1961-11-22 Bwg Bergwerk Walzwerk Improvements in and relating to telescopic hydraulic pit-prop
FR78068E (en) * 1960-06-11 1962-06-01 Gutehoffnungshuette Sterkrade Multi-part hydraulic telescopic mine prop
US3329250A (en) * 1965-03-02 1967-07-04 May Pressenbau Gmbh Overload safety device for presses
GB1368654A (en) * 1971-03-11 1974-10-02 Bergwerksverband Gmbh Pneumatically-operated valve for use with for example hydraulic cylinders used in consolidating means for mineworkings
DE2146502C3 (en) * 1971-09-17 1982-04-29 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Valve arrangement for setting hydraulic pit rams with high setting force
FR2264462A7 (en) * 1974-02-18 1975-10-10 Midi Houilleres Loire Hou Cent Safety valve for hydraulic mine prop - has truncated conical spring loaded piston and radial outlets
DE2447425B2 (en) * 1974-10-04 1976-07-29 Hermann Hemscheidt Maschinenfabrik, 5600 Wuppertal CONTROL VALVE FOR HYDRAULICALLY STEPPING STRUCTURE

Also Published As

Publication number Publication date
DE2537715C3 (en) 1980-11-06
DE2537715B2 (en) 1980-03-13
FR2322319A1 (en) 1977-03-25
DE2537715A1 (en) 1977-03-03
FR2322319B1 (en) 1982-05-14

Similar Documents

Publication Publication Date Title
GB1540826A (en) Relief valves
JPS5217162A (en) Valve for hydraulic courling
CA1029272A (en) Pilot operated relief valve
HU178484B (en) Hydraulic valve controller
ZA762646B (en) Hydraulic ram valve unit
CA1028598A (en) Overrunning load control for hydraulic jacks
JPS52144576A (en) Hydraulic control valve
GB1554643A (en) Pressure relief valve for hydraulic mine supporting elemenst
JPS5330536A (en) Hydraulic valve
GB1519423A (en) Slide valve piston for an hydraulic control slide valve
ZA765213B (en) Pressure relief valve
GB1553682A (en) Pressure-reducing valve for providing a two-stage telescopic hydraulic pit stop
GB1524400A (en) Relief valve
JPS5224328A (en) Hydraulic pressure control valve
NL185417C (en) CONTROL VALVE FOR A HYDRAULIC CIRCUIT.
AU501997B2 (en) Hydraulic height control
JPS5219721A (en) Hydraulic compound
GB1555145A (en) Hydraulic control valve device
GB1541749A (en) Hydraulic control valve assembly
JPS51119518A (en) Check valve for protecting hydraulic shock
JPS51120430A (en) Check valve for protecting hydraulic shock
JPS5286600A (en) Hydraulic wrench
ZA757678B (en) Pressure relief valve for a hydraulic pit prop
GB1555147A (en) Hydraulic control valve device
YU162376A (en) Sefety valve for a hydraulic mine post

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee