GB978598A - Friction caps for pit props - Google Patents

Friction caps for pit props

Info

Publication number
GB978598A
GB978598A GB163063A GB163063A GB978598A GB 978598 A GB978598 A GB 978598A GB 163063 A GB163063 A GB 163063A GB 163063 A GB163063 A GB 163063A GB 978598 A GB978598 A GB 978598A
Authority
GB
United Kingdom
Prior art keywords
pit props
friction
friction caps
caps
nylon
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
GB163063A
Inventor
Alec Sabin Baines
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.)
BURNS Ltd J
Original Assignee
BURNS Ltd J
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 BURNS Ltd J filed Critical BURNS Ltd J
Priority to GB163063A priority Critical patent/GB978598A/en
Publication of GB978598A publication Critical patent/GB978598A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/54—Details of the ends of props

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

978,598. Mine roof support caps. J. BURNS Ltd. Oct. 24, 1963 [Jan 14, 1963], No. 1630/63. Drawings to Specification. Heading E1E. A friction cap for a pit prop is constructed from a mixture of nylon 6 and nylon 66 in the range 90-70% and 10-30% by weight, respectively. The surface of the cap may be roughened or provided with a layer of sand.
GB163063A 1963-01-14 1963-01-14 Friction caps for pit props Expired GB978598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB163063A GB978598A (en) 1963-01-14 1963-01-14 Friction caps for pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB163063A GB978598A (en) 1963-01-14 1963-01-14 Friction caps for pit props

Publications (1)

Publication Number Publication Date
GB978598A true GB978598A (en) 1964-12-23

Family

ID=9725271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB163063A Expired GB978598A (en) 1963-01-14 1963-01-14 Friction caps for pit props

Country Status (1)

Country Link
GB (1) GB978598A (en)

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