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GB931094A - Improvements in releasable chocks - Google Patents

Improvements in releasable chocks

Info

Publication number
GB931094A
GB931094A GB1481059A GB1481059A GB931094A GB 931094 A GB931094 A GB 931094A GB 1481059 A GB1481059 A GB 1481059A GB 1481059 A GB1481059 A GB 1481059A GB 931094 A GB931094 A GB 931094A
Authority
GB
United Kingdom
Prior art keywords
releasable
chocks
april
locking means
members
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
GB1481059A
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
Priority to GB1481059A priority Critical patent/GB931094A/en
Publication of GB931094A publication Critical patent/GB931094A/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
    • E21D15/60—Devices for withdrawing props or chocks

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)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

931,094. Releasable chocks. S. HAYWOOD. April 29, 1960 [April 30, 1959], No. 14810/59. Class 20 (2). A releasable chock for supporting the foot of a mine arch comprises a pair of parallel members 5, 6 which are pivotably interconnected by pairs of links 7, 8 and are provided with releasable locking means for maintaining said members 5, 6 in an extended condition. The locking means consists of a pivoted bar 12 which is notched at 14 to engage an abutment 15 welded to the member 6, disengagement therebetween being effected by a chain, rope or pulling jack.
GB1481059A 1959-04-30 1959-04-30 Improvements in releasable chocks Expired GB931094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1481059A GB931094A (en) 1959-04-30 1959-04-30 Improvements in releasable chocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1481059A GB931094A (en) 1959-04-30 1959-04-30 Improvements in releasable chocks

Publications (1)

Publication Number Publication Date
GB931094A true GB931094A (en) 1963-07-10

Family

ID=10047878

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1481059A Expired GB931094A (en) 1959-04-30 1959-04-30 Improvements in releasable chocks

Country Status (1)

Country Link
GB (1) GB931094A (en)

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