GB709242A - Cap shoe for mine roof supports - Google Patents

Cap shoe for mine roof supports

Info

Publication number
GB709242A
GB709242A GB5645/52A GB564552A GB709242A GB 709242 A GB709242 A GB 709242A GB 5645/52 A GB5645/52 A GB 5645/52A GB 564552 A GB564552 A GB 564552A GB 709242 A GB709242 A GB 709242A
Authority
GB
United Kingdom
Prior art keywords
bar
shoe
pin
mine roof
suspended
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
GB5645/52A
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.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
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 Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Publication of GB709242A publication Critical patent/GB709242A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

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)
  • Load-Engaging Elements For Cranes (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

709,242. Mine roof supporting bars. DIRECTIE VAN DE STAATSMIJNEN IN LIMBURG. March 4, 1952 [March 8, 1951], No. 5645/52. Class 20 (2) One mine roof supporting bar 5 is pivotally connected by pin 7 and hole 3 to another bar 1 and is supported therefrom by a bar shoe 8 suspended from a pin 4 on the bar 1 and extending under the adjacent ends of the two bars, the shoe 8 being adapted to press elastically against and support the bar 5. As shown in Fig. 1, the bar shoe 8 is rockably suspended from the pin 4 by means of hooks 9 on a bifurcated shoe arm 10 in which a laminated plate spring 11 is secured. The end 13 of the plate spring 11 is pressed up against the bar 5 by means of an adjustment screw 14. In Fig. 4, the shoe 8 comprises a continuous laminated plate spring 16 embraced by a shackle 17 suspended from the pin 4, an adjustment screw 19 in the shackle 17 being adapted to press the spring 16 upwardly against the bars 1, 5. Specifications 709,240 and 709,241 are referred to.
GB5645/52A 1951-03-08 1952-03-04 Cap shoe for mine roof supports Expired GB709242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL709242X 1951-03-08

Publications (1)

Publication Number Publication Date
GB709242A true GB709242A (en) 1954-05-19

Family

ID=19812158

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5645/52A Expired GB709242A (en) 1951-03-08 1952-03-04 Cap shoe for mine roof supports

Country Status (5)

Country Link
BE (1) BE509688A (en)
DE (1) DE960444C (en)
FR (1) FR1052016A (en)
GB (1) GB709242A (en)
NL (1) NL71298C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103269B (en) * 1957-05-29 1961-03-30 Dowty Mining Equipment Ltd Hydraulically operated support device for the hanging wall

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE803992C (en) * 1949-07-03 1951-04-16 Wilhelm Reppel Cap made of juxtaposed links for mining, especially longwall mining

Also Published As

Publication number Publication date
FR1052016A (en) 1954-01-20
DE960444C (en) 1957-03-21
NL71298C (en)
BE509688A (en)

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