DE3200523C2 - - Google Patents

Info

Publication number
DE3200523C2
DE3200523C2 DE19823200523 DE3200523A DE3200523C2 DE 3200523 C2 DE3200523 C2 DE 3200523C2 DE 19823200523 DE19823200523 DE 19823200523 DE 3200523 A DE3200523 A DE 3200523A DE 3200523 C2 DE3200523 C2 DE 3200523C2
Authority
DE
Germany
Prior art keywords
valve
pressure medium
control
motor
lifting cylinder
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
DE19823200523
Other languages
German (de)
English (en)
Other versions
DE3200523A1 (de
Inventor
Richard Worsley Lancashire Gb Ward
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.)
DOBSON PARK INDUSTRIES Ltd NOTTINGHAM NOTTINGHAMSHIRE GB
Original Assignee
DOBSON PARK INDUSTRIES Ltd NOTTINGHAM NOTTINGHAMSHIRE GB
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 NOTTINGHAM NOTTINGHAMSHIRE GB filed Critical DOBSON PARK INDUSTRIES Ltd NOTTINGHAM NOTTINGHAMSHIRE GB
Publication of DE3200523A1 publication Critical patent/DE3200523A1/de
Application granted granted Critical
Publication of DE3200523C2 publication Critical patent/DE3200523C2/de
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)
  • Electrically Driven Valve-Operating Means (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Fluid-Driven Valves (AREA)
DE19823200523 1981-02-25 1982-01-11 Vorrichtung zur auswahl einer betrieblichen funktion eines druckmittelbetaetigbaren ausbaugestells im untertaegigen bergbau Granted DE3200523A1 (de)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
DE3200523A1 DE3200523A1 (de) 1982-10-14
DE3200523C2 true DE3200523C2 (US08197722-20120612-C00042.png) 1988-03-03

Family

ID=10519963

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823200523 Granted DE3200523A1 (de) 1981-02-25 1982-01-11 Vorrichtung zur auswahl einer betrieblichen funktion eines druckmittelbetaetigbaren ausbaugestells im untertaegigen bergbau

Country Status (3)

Country Link
DE (1) DE3200523A1 (US08197722-20120612-C00042.png)
FR (1) FR2500527A1 (US08197722-20120612-C00042.png)
GB (1) GB2095425B (US08197722-20120612-C00042.png)

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
FR2500527A1 (fr) 1982-08-27
GB2095425B (en) 1984-06-27
FR2500527B1 (US08197722-20120612-C00042.png) 1984-05-18
GB2095425A (en) 1982-09-29
DE3200523A1 (de) 1982-10-14

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee