GB815384A - Improvements in or relating to pit props - Google Patents

Improvements in or relating to pit props

Info

Publication number
GB815384A
GB815384A GB15281/56A GB1528156A GB815384A GB 815384 A GB815384 A GB 815384A GB 15281/56 A GB15281/56 A GB 15281/56A GB 1528156 A GB1528156 A GB 1528156A GB 815384 A GB815384 A GB 815384A
Authority
GB
United Kingdom
Prior art keywords
prop
cap
mine
pit
gerlach
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
GB15281/56A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB815384A publication Critical patent/GB815384A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/581—Devices for setting props or chocks in which the props are pre- loaded

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)
  • Pivots And Pivotal Connections (AREA)

Abstract

815,384. Pit props. GERLACH, K., and GERLACH, H. May 16, 1956 [May 16, 1955], No. 15281/56. Class 20(2) A pit prop comprises a head or foot having three or more parts 2, 4 6 connected by screw threads of apposite hand so that when the central part 4 is turned the prop head is forced against the mine roof cap. A polygonal extension 7 on the part 6 engages a similarly shaped hole in the part. 2 to prevent relative rotation of these parts and a pin 8 in the extension prevents. complete withdrawal. A plate 10 on a spherical bearing engages the mine cap. Fig. 4 shows an upper part 6 containing a magnet 11 which adheres to and positions the prop relative to a mine cap
GB15281/56A 1955-05-16 1956-05-16 Improvements in or relating to pit props Expired GB815384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE815384X 1955-05-16

Publications (1)

Publication Number Publication Date
GB815384A true GB815384A (en) 1959-06-24

Family

ID=6734755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15281/56A Expired GB815384A (en) 1955-05-16 1956-05-16 Improvements in or relating to pit props

Country Status (1)

Country Link
GB (1) GB815384A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333380A (en) * 1964-02-07 1967-08-01 Wolf Heinz Adjustable leveling implement for finishing cast concrete layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333380A (en) * 1964-02-07 1967-08-01 Wolf Heinz Adjustable leveling implement for finishing cast concrete layers

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