[go: up one dir, main page]

GB1438176A - - Google Patents

Info

Publication number
GB1438176A
GB1438176A GB3346973A GB3346973A GB1438176A GB 1438176 A GB1438176 A GB 1438176A GB 3346973 A GB3346973 A GB 3346973A GB 3346973 A GB3346973 A GB 3346973A GB 1438176 A GB1438176 A GB 1438176A
Authority
GB
United Kingdom
Prior art keywords
cutter
ram
mining machine
hydraulic circuit
hydraulic
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
GB3346973A
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 filed Critical
Priority to GB3346973A priority Critical patent/GB1438176A/en
Publication of GB1438176A publication Critical patent/GB1438176A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/108—Remote control specially adapted for machines for driving tunnels or galleries
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/106—Making by using boring or cutting machines with percussive tools, e.g. pick-hammers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Shearing Machines (AREA)

Abstract

1438176 Mining machine COAL INDUSTRY (PATENTS) Ltd 22 May 1974 [13 July 1973] 33469/73 Heading E1F A mining machine comprises two hydraulic circuits 40, 41 for actuating an impact cutter 26 and a ram 27 for moving the cutter along a slide and a pilot operated check valve 54 operable when the ram 27 has advanced the cutter into engagement with the workface to feed excess pressure fluid from the hydraulic circuit 41 associated with the ram 27 to the hydraulic circuit 40 associated with the cutter.
GB3346973A 1973-07-13 1973-07-13 Expired GB1438176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3346973A GB1438176A (en) 1973-07-13 1973-07-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3346973A GB1438176A (en) 1973-07-13 1973-07-13

Publications (1)

Publication Number Publication Date
GB1438176A true GB1438176A (en) 1976-06-03

Family

ID=10353375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3346973A Expired GB1438176A (en) 1973-07-13 1973-07-13

Country Status (1)

Country Link
GB (1) GB1438176A (en)

Similar Documents

Publication Publication Date Title
GB1160451A (en) Fixed Increment Advance of Face Conveyors
GB1438176A (en)
GB1289299A (en)
GB1164822A (en) Improvements in the Control of Advanceable Conveyors used in Mines
NL256189A (en)
YU163281A (en) Valve for limiting pressure, particulalrly for hydraulic mine reinforcements
GB1047782A (en) Mineral mining machines
ES8203457A1 (en) Hydraulic control means
GB991009A (en) Mining apparatus
JPS51148891A (en) Punching device for punching a th rough hole between a set of neighbouring holes punched on a workpiece
GB1314073A (en) Intermittent feed mechanism for a perforated tape
GB1108625A (en) Improvements in remotely controlled shovel loader vehicles for performing mining work
GB1145743A (en) Mining machine installations
GB1453802A (en) Mineral mining installations
GB1025879A (en) Mining apparatus
GB1233188A (en)
GB1454530A (en) Control systems for use in mineral mining installations
GB1430240A (en) Mine roof support
GB1114006A (en) Roof support assembly suitable for use in mines
GB1184788A (en) Mine Roof Support Systems
GB1079860A (en) A control system for a pluratlity of hydraulically operable elements
GB1208638A (en) Press tool
GB984383A (en) Improvements relating to mechanical excavators
GB1063295A (en) Means for locating members
GB1235353A (en) Improvements in or relating to longwall mineral mining installations

Legal Events

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