GB778914A - Improvements in or relating to chock release devices for pit chocks and the like - Google Patents

Improvements in or relating to chock release devices for pit chocks and the like

Info

Publication number
GB778914A
GB778914A GB1560054A GB1560054A GB778914A GB 778914 A GB778914 A GB 778914A GB 1560054 A GB1560054 A GB 1560054A GB 1560054 A GB1560054 A GB 1560054A GB 778914 A GB778914 A GB 778914A
Authority
GB
United Kingdom
Prior art keywords
chocks
pit
relating
release devices
catch
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
GB1560054A
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.)
NEWCASTLE COLLIERY EQUIPMENT L
Original Assignee
NEWCASTLE COLLIERY EQUIPMENT L
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 NEWCASTLE COLLIERY EQUIPMENT L filed Critical NEWCASTLE COLLIERY EQUIPMENT L
Priority to GB1560054A priority Critical patent/GB778914A/en
Publication of GB778914A publication Critical patent/GB778914A/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)
  • Handcart (AREA)

Abstract

778,914. Mine chocks. NEWCASTLE COLLIERY EQUIPMENT, Ltd., and PEACOCK, T. May 23, 1955 [May 26, 1954], No. 15600/54. Class 20(2) A release for mine chocks com- (prises a top part 14 adapted to be released from an inclined plane 17 on a lower part 11 by means of a catch 19 which is moved downwards when a bar 21 is moved horizontally to disengage an abutment 23 from the catch. The catch is on an arm pivoted on a bolt 27 between. the channels 12, 13 forming the chock release.
GB1560054A 1954-05-26 1954-05-26 Improvements in or relating to chock release devices for pit chocks and the like Expired GB778914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1560054A GB778914A (en) 1954-05-26 1954-05-26 Improvements in or relating to chock release devices for pit chocks and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1560054A GB778914A (en) 1954-05-26 1954-05-26 Improvements in or relating to chock release devices for pit chocks and the like

Publications (1)

Publication Number Publication Date
GB778914A true GB778914A (en) 1957-07-17

Family

ID=10062045

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1560054A Expired GB778914A (en) 1954-05-26 1954-05-26 Improvements in or relating to chock release devices for pit chocks and the like

Country Status (1)

Country Link
GB (1) GB778914A (en)

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