GB1315967A - Self-advancing mine roof supports - Google Patents

Self-advancing mine roof supports

Info

Publication number
GB1315967A
GB1315967A GB1315967DA GB1315967A GB 1315967 A GB1315967 A GB 1315967A GB 1315967D A GB1315967D A GB 1315967DA GB 1315967 A GB1315967 A GB 1315967A
Authority
GB
United Kingdom
Prior art keywords
mine roof
advancing mine
self
roof supports
clevis
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
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson 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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Publication of GB1315967A publication Critical patent/GB1315967A/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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith

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)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Body Structure For Vehicles (AREA)
  • Transmission Devices (AREA)
  • Railway Tracks (AREA)

Abstract

1315967 Advancing mine roof supports GULLICK DOBSON Ltd 30 Oct 1970 [8 Nov 1969] 54791/69 Heading E1P In an advancing mine roof support as claimed in claims 1-13 of Specification 1235288 the means thereof for releasably securing one of the units to the rail 14 comprises a clevis 10, 12, 13 adapted to be releasably clamped thereto by a cam or overcentre device 18 which acts on a bowed spring 15 and is actuated by a piston rod 20. The clevis may be provided with a friction insert 21.
GB1315967D 1969-11-08 1969-11-08 Self-advancing mine roof supports Expired GB1315967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5479169 1969-11-08

Publications (1)

Publication Number Publication Date
GB1315967A true GB1315967A (en) 1973-05-09

Family

ID=10472087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1315967D Expired GB1315967A (en) 1969-11-08 1969-11-08 Self-advancing mine roof supports

Country Status (2)

Country Link
DE (1) DE2054355A1 (en)
GB (1) GB1315967A (en)

Also Published As

Publication number Publication date
DE2054355A1 (en) 1971-05-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees