GB1060483A - Improvements in and relating to withdrawal devices for hydraulic pit props - Google Patents

Improvements in and relating to withdrawal devices for hydraulic pit props

Info

Publication number
GB1060483A
GB1060483A GB3208262A GB3208262A GB1060483A GB 1060483 A GB1060483 A GB 1060483A GB 3208262 A GB3208262 A GB 3208262A GB 3208262 A GB3208262 A GB 3208262A GB 1060483 A GB1060483 A GB 1060483A
Authority
GB
United Kingdom
Prior art keywords
hydraulic pit
relating
withdrawal devices
pit props
withdrawal
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
GB3208262A
Inventor
Reginald Reynolds
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.)
Acrow Engineers Ltd
Original Assignee
Acrow Engineers Ltd
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 Acrow Engineers Ltd filed Critical Acrow Engineers Ltd
Priority to GB3208262A priority Critical patent/GB1060483A/en
Publication of GB1060483A publication Critical patent/GB1060483A/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)
  • Types And Forms Of Lifts (AREA)

Abstract

1,060,483. Withdrawal devices for hydraulic pit props. ACROW (ENGINEERS) Ltd. Aug. 21, 1963 [Aug. 21, 1962], No. 32082/62. Heading E1E. A withdrawal device for an hydraulic pit prop 2 having a release valve actuating plunger 4 with a fulcrum pin 12 adjacent thereto comprises a combined lever 8 and bridle 18, 20 - the lever having a hooked positioning end 10 and an abutment 14 whereby it can be pivoted about the pin 12 to depress the plunger 4.
GB3208262A 1962-08-21 1962-08-21 Improvements in and relating to withdrawal devices for hydraulic pit props Expired GB1060483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3208262A GB1060483A (en) 1962-08-21 1962-08-21 Improvements in and relating to withdrawal devices for hydraulic pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3208262A GB1060483A (en) 1962-08-21 1962-08-21 Improvements in and relating to withdrawal devices for hydraulic pit props

Publications (1)

Publication Number Publication Date
GB1060483A true GB1060483A (en) 1967-03-01

Family

ID=10332938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3208262A Expired GB1060483A (en) 1962-08-21 1962-08-21 Improvements in and relating to withdrawal devices for hydraulic pit props

Country Status (1)

Country Link
GB (1) GB1060483A (en)

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