GB993670A - Roof support assemblies suitable for use in mines - Google Patents

Roof support assemblies suitable for use in mines

Info

Publication number
GB993670A
GB993670A GB38395/62A GB3839562A GB993670A GB 993670 A GB993670 A GB 993670A GB 38395/62 A GB38395/62 A GB 38395/62A GB 3839562 A GB3839562 A GB 3839562A GB 993670 A GB993670 A GB 993670A
Authority
GB
United Kingdom
Prior art keywords
line
pressure
switch
advance
valve
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
GB38395/62A
Other languages
English (en)
Inventor
Michael Charles Potts
Douglas Herbert Hewlett Bolton
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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
Priority to DENDAT1192140D priority Critical patent/DE1192140B/de
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to GB38395/62A priority patent/GB993670A/en
Priority to US314324A priority patent/US3196756A/en
Priority to FR950145A priority patent/FR1371070A/fr
Publication of GB993670A publication Critical patent/GB993670A/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)
  • Fluid-Pressure Circuits (AREA)
  • Catching Or Destruction (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
GB38395/62A 1962-10-10 1962-10-10 Roof support assemblies suitable for use in mines Expired GB993670A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DENDAT1192140D DE1192140B (de) 1962-10-10 Strebausbau
GB38395/62A GB993670A (en) 1962-10-10 1962-10-10 Roof support assemblies suitable for use in mines
US314324A US3196756A (en) 1962-10-10 1963-10-07 Roof support assemblies
FR950145A FR1371070A (fr) 1962-10-10 1963-10-10 Ensemble de soutènement à signalisation sonore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38395/62A GB993670A (en) 1962-10-10 1962-10-10 Roof support assemblies suitable for use in mines

Publications (1)

Publication Number Publication Date
GB993670A true GB993670A (en) 1965-06-02

Family

ID=10403194

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38395/62A Expired GB993670A (en) 1962-10-10 1962-10-10 Roof support assemblies suitable for use in mines

Country Status (3)

Country Link
US (1) US3196756A (de)
DE (1) DE1192140B (de)
GB (1) GB993670A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1425480A (fr) * 1964-12-09 1966-01-24 Rech Etudes Prod Contrôleur d'effort
US3924752A (en) * 1974-07-16 1975-12-09 Bwb Controls Inc Crane boom and line safety limit warning assembly

Also Published As

Publication number Publication date
US3196756A (en) 1965-07-27
DE1192140B (de) 1965-05-06

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