GB2042035B - Prop control system - Google Patents

Prop control system

Info

Publication number
GB2042035B
GB2042035B GB7904143A GB7904143A GB2042035B GB 2042035 B GB2042035 B GB 2042035B GB 7904143 A GB7904143 A GB 7904143A GB 7904143 A GB7904143 A GB 7904143A GB 2042035 B GB2042035 B GB 2042035B
Authority
GB
United Kingdom
Prior art keywords
control system
prop control
prop
control
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
GB7904143A
Other versions
GB2042035A (en
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.)
Fletcher Sutcliffe Wild Ltd
Original Assignee
Fletcher Sutcliffe Wild 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 Fletcher Sutcliffe Wild Ltd filed Critical Fletcher Sutcliffe Wild Ltd
Priority to GB7904143A priority Critical patent/GB2042035B/en
Publication of GB2042035A publication Critical patent/GB2042035A/en
Application granted granted Critical
Publication of GB2042035B publication Critical patent/GB2042035B/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

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)
  • Safety Valves (AREA)
GB7904143A 1979-02-06 1979-02-06 Prop control system Expired GB2042035B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7904143A GB2042035B (en) 1979-02-06 1979-02-06 Prop control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7904143A GB2042035B (en) 1979-02-06 1979-02-06 Prop control system

Publications (2)

Publication Number Publication Date
GB2042035A GB2042035A (en) 1980-09-17
GB2042035B true GB2042035B (en) 1983-05-05

Family

ID=10503001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7904143A Expired GB2042035B (en) 1979-02-06 1979-02-06 Prop control system

Country Status (1)

Country Link
GB (1) GB2042035B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3100093A1 (en) * 1981-01-03 1982-08-05 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen DEVICE FOR LIMITING THE REMOVAL RESISTANCE OF A HYDRAULIC REMOVAL PLATE
GB2116618B (en) * 1982-03-06 1985-11-20 Dowty Mining Equipment Ltd Mine roof supports
GB2137314B (en) * 1983-03-26 1986-07-23 Dobson Park Ind Valve for mine support
GB8428788D0 (en) * 1984-11-14 1984-12-27 Fletcher Sutcliffe Wild Ltd Control system
PL146170B1 (en) * 1984-12-10 1989-01-31 Ct Kt Maszyn Gorniczych Komag Apparatus for changing curability and mineablity of a mineral deposit
GB8432568D0 (en) * 1984-12-22 1985-02-06 Fletcher Sutcliffe Wild Ltd Control valve
DE3546278C1 (en) * 1985-12-28 1987-07-02 Bergwerksverband Gmbh Repositioning control for longwall construction

Also Published As

Publication number Publication date
GB2042035A (en) 1980-09-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee
PCPE Delete 'patent ceased' from journal

Free format text: 5195, PAGE 2892

PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940206