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)

Similar Documents

Publication Publication Date Title
GB931094A (en) Improvements in releasable chocks
GB917334A (en) Improvements in locking units for casement and similar windows
GB862898A (en) Improvements in sheets or composite sheets for use in building and similar purposes
GB943037A (en) Sled, more particularly for rescue purposes
GB950066A (en) Improvements in or relating to advancing roof supporting means for mines
GB932455A (en) Plough type coal-wiring equipment
GB906751A (en) Improvements in or relating to conveyor chains
GB802172A (en) Improvements in or relating to rotary tipplers
GB905312A (en) Roof supporting devices suitable for use in mines
GB898591A (en) Arrangements for shifting roof-supporting frames
GB932351A (en) Emergency chain links
GB907233A (en) Clamps for structural members
GB884384A (en) Means for withdrawing roof-support elements in long-wall mine workings
GB818677A (en) Self-leveling storing and dispensing apparatus
GB899893A (en) Improvements in or relating to supplementary leg means for ladders
ES57184U (en) Trailer wheel for chains of load in equipment of elevation and transport by chain (Machine-translation by Google Translate, not legally binding)
GB916421A (en) Improvements in or relating to platform elevators
GB904656A (en) Device for use with lifting gear
GB805091A (en) Improvements in, or relating to, mine roof supporting bars
GB772868A (en) Improvements in or relating to roof supporting appliances for mines and the like
GB858906A (en) Load carrying means
GB909178A (en) Improvements in or relating to mining gallery support structures
GB925212A (en) Improvements relating to mine support bars
GB942310A (en) Hydraulically-actuated anchoring device for a mine face conveyor, more particularly for the main drive unit of the face conveyor for use in mining
GB831711A (en) Bracing arrangement for a stripping-action scraper installation for use in coal or other mines