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GB798722A - Improvements in, or relating to, collapsible supporting devices for mine roofs and the like - Google Patents

Improvements in, or relating to, collapsible supporting devices for mine roofs and the like

Info

Publication number
GB798722A
GB798722A GB29596/54A GB2959654A GB798722A GB 798722 A GB798722 A GB 798722A GB 29596/54 A GB29596/54 A GB 29596/54A GB 2959654 A GB2959654 A GB 2959654A GB 798722 A GB798722 A GB 798722A
Authority
GB
United Kingdom
Prior art keywords
lower member
wedge
relating
supporting devices
collapsible supporting
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
GB29596/54A
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.)
HILL PORTER NEWCASTLE Ltd
Original Assignee
HILL PORTER NEWCASTLE 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 HILL PORTER NEWCASTLE Ltd filed Critical HILL PORTER NEWCASTLE Ltd
Priority to GB29596/54A priority Critical patent/GB798722A/en
Publication of GB798722A publication Critical patent/GB798722A/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
    • E21D15/52—Extensible units located above or below standard props
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
    • 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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
    • 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
    • E21D15/60—Devices for withdrawing props or chocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Drawing Aids And Blackboards (AREA)
  • Connection Of Plates (AREA)
  • Accessories Of Cameras (AREA)

Abstract

798,722. Chocks and props. HILL PORTER (NEWCASTLE), Ltd., and TALBOTT, A. C. ,Oct. 6. 1955 [Oct. 14, 1954], No. 29596/54. Class 20(2) A chock or prop head comprises an upper member a; a lower member d both having side plates b, e respectively, separated by a wedge i the tangent of the angle of inclination of each bearing face of -the wedge to the base of the lower member being a little less than the coefficient of static friction between the engaging surfaces. The wedge consists of two side members connected by cross-pieces j. The upper and lower member are retained together by the turned in ends of cross-pieces c of the upper member and a plate h on a vertical member g of the lower member. The wedge is guided by members f on the lower member.
GB29596/54A 1954-10-14 1954-10-14 Improvements in, or relating to, collapsible supporting devices for mine roofs and the like Expired GB798722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB29596/54A GB798722A (en) 1954-10-14 1954-10-14 Improvements in, or relating to, collapsible supporting devices for mine roofs and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29596/54A GB798722A (en) 1954-10-14 1954-10-14 Improvements in, or relating to, collapsible supporting devices for mine roofs and the like

Publications (1)

Publication Number Publication Date
GB798722A true GB798722A (en) 1958-07-23

Family

ID=10294042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29596/54A Expired GB798722A (en) 1954-10-14 1954-10-14 Improvements in, or relating to, collapsible supporting devices for mine roofs and the like

Country Status (1)

Country Link
GB (1) GB798722A (en)

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