FR2500527B1 - - Google Patents

Info

Publication number
FR2500527B1
FR2500527B1 FR8124601A FR8124601A FR2500527B1 FR 2500527 B1 FR2500527 B1 FR 2500527B1 FR 8124601 A FR8124601 A FR 8124601A FR 8124601 A FR8124601 A FR 8124601A FR 2500527 B1 FR2500527 B1 FR 2500527B1
Authority
FR
France
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
FR8124601A
Other languages
French (fr)
Other versions
FR2500527A1 (fr
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.)
Joy Global Industries Ltd
Original Assignee
Dobson Park Industries Ltd
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 Dobson Park Industries Ltd filed Critical Dobson Park Industries Ltd
Publication of FR2500527A1 publication Critical patent/FR2500527A1/fr
Application granted granted Critical
Publication of FR2500527B1 publication Critical patent/FR2500527B1/fr
Granted 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
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
    • 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
    • E21D23/26—Hydraulic or pneumatic control

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)
  • Servomotors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
FR8124601A 1981-02-25 1981-12-31 Systeme de commande d'un soutenement du toit de mine a auto-avancement actionne par un fluide sous pression Granted FR2500527A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8105963 1981-02-25

Publications (2)

Publication Number Publication Date
FR2500527A1 FR2500527A1 (fr) 1982-08-27
FR2500527B1 true FR2500527B1 (en, 2012) 1984-05-18

Family

ID=10519963

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8124601A Granted FR2500527A1 (fr) 1981-02-25 1981-12-31 Systeme de commande d'un soutenement du toit de mine a auto-avancement actionne par un fluide sous pression

Country Status (3)

Country Link
DE (1) DE3200523A1 (en, 2012)
FR (1) FR2500527A1 (en, 2012)
GB (1) GB2095425B (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153971B (en) * 1984-02-08 1988-01-13 Dobson Park Ind Valve assembly
GB2188703B (en) * 1986-04-03 1990-03-21 Dobson Park Ind Valves
DE3807099A1 (de) * 1988-03-04 1989-09-14 Bosch Gmbh Robert Handbetaetigtes schaltventil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE794193A (fr) * 1972-03-16 1973-05-16 Gewerk Eisenhuette Westfalia Systeme de commande sequentielle pour le ripage automatique d'un groupe d'elements de soutenement
GB1433631A (en) * 1972-05-24 1976-04-28 Bochumer Eisen Heintzmann Multi-component roof support for a self-advancing roof control system at longwall faces in mines
GB1517711A (en) * 1974-08-20 1978-07-12 Gullick Dobson Ltd Self-advancing mine roof supports
GB1531246A (en) * 1975-07-29 1978-11-08 Gullick Dobson Ltd Mine roof support control systems
DE2700829C2 (de) * 1977-01-11 1986-04-17 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Hydraulische Ausbausteuerung

Also Published As

Publication number Publication date
GB2095425B (en) 1984-06-27
GB2095425A (en) 1982-09-29
DE3200523C2 (en, 2012) 1988-03-03
FR2500527A1 (fr) 1982-08-27
DE3200523A1 (de) 1982-10-14

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Legal Events

Date Code Title Description
ST Notification of lapse