ZA711598B - Improvements in or relating to load supports - Google Patents

Improvements in or relating to load supports

Info

Publication number
ZA711598B
ZA711598B ZA711598A ZA711598A ZA711598B ZA 711598 B ZA711598 B ZA 711598B ZA 711598 A ZA711598 A ZA 711598A ZA 711598 A ZA711598 A ZA 711598A ZA 711598 B ZA711598 B ZA 711598B
Authority
ZA
South Africa
Prior art keywords
relating
load supports
supports
load
Prior art date
Application number
ZA711598A
Inventor
F Town
Original Assignee
Gullick Dobson 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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Publication of ZA711598B publication Critical patent/ZA711598B/en

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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves

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)
  • Safety Valves (AREA)
ZA711598A 1970-01-24 1971-03-11 Improvements in or relating to load supports ZA711598B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB353170 1970-01-24

Publications (1)

Publication Number Publication Date
ZA711598B true ZA711598B (en) 1971-12-29

Family

ID=9760089

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA711598A ZA711598B (en) 1970-01-24 1971-03-11 Improvements in or relating to load supports

Country Status (3)

Country Link
DE (1) DE2042295A1 (en)
GB (1) GB1342741A (en)
ZA (1) ZA711598B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237769A (en) * 1978-04-03 1980-12-09 Commercial Shearing, Inc. Relief valves and mine props incorporating the same
GB2069048B (en) * 1980-01-21 1984-06-06 Commercial Shearing Longwall jacks
DE4012481C2 (en) * 1990-04-19 2002-04-25 Dbt Gmbh Valve device with a hydraulically unlockable check valve for hydraulic mining systems, especially for hydraulic expansion systems
CN115023533A (en) * 2019-11-11 2022-09-06 J.雷.麦克德莫特股份有限公司 Destructive coupling system and method for subsea systems

Also Published As

Publication number Publication date
DE2042295A1 (en) 1972-05-31
GB1342741A (en) 1974-01-03

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