GB723692A - An improved chock release for use in mines and the like - Google Patents

An improved chock release for use in mines and the like

Info

Publication number
GB723692A
GB723692A GB1726852A GB1726852A GB723692A GB 723692 A GB723692 A GB 723692A GB 1726852 A GB1726852 A GB 1726852A GB 1726852 A GB1726852 A GB 1726852A GB 723692 A GB723692 A GB 723692A
Authority
GB
United Kingdom
Prior art keywords
uprights
mines
base
chock
release
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
GB1726852A
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.)
RALPH BARRASS OLD
Original Assignee
RALPH BARRASS OLD
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 RALPH BARRASS OLD filed Critical RALPH BARRASS OLD
Priority to GB1726852A priority Critical patent/GB723692A/en
Publication of GB723692A publication Critical patent/GB723692A/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)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

723,692. Mine chocks. OLD, R. B. June 5, 1953 [July 9, 1952], No. 17268/52. Class 20 (2). A chock release in mines supports the chock pieces by vertical uprights 5 pivoting at 4 on a base 1, the uprights being released by removing a catch 7, pivoted on each upright and engaging the base, by tapping extension 7b or pulling on a pin 8 by a Sylvestor which will also cause the uprights to pivot about pins 4 and collapse the chock structure. The clearance of pins 4 is sufficient to allow the uprights 5 to rest on the base 1.
GB1726852A 1952-07-09 1952-07-09 An improved chock release for use in mines and the like Expired GB723692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1726852A GB723692A (en) 1952-07-09 1952-07-09 An improved chock release for use in mines and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1726852A GB723692A (en) 1952-07-09 1952-07-09 An improved chock release for use in mines and the like

Publications (1)

Publication Number Publication Date
GB723692A true GB723692A (en) 1955-02-09

Family

ID=10092205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1726852A Expired GB723692A (en) 1952-07-09 1952-07-09 An improved chock release for use in mines and the like

Country Status (1)

Country Link
GB (1) GB723692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043549A (en) * 1959-07-17 1962-07-10 Auto Crane Company Apparatus for stabilizing equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043549A (en) * 1959-07-17 1962-07-10 Auto Crane Company Apparatus for stabilizing equipment

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