GB1342741A - - Google Patents

Info

Publication number
GB1342741A
GB1342741A GB353170A GB1342741DA GB1342741A GB 1342741 A GB1342741 A GB 1342741A GB 353170 A GB353170 A GB 353170A GB 1342741D A GB1342741D A GB 1342741DA GB 1342741 A GB1342741 A GB 1342741A
Authority
GB
United Kingdom
Prior art keywords
valve
fluid
pressure
support
jan
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
GB353170A
Other languages
English (en)
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 filed Critical
Publication of GB1342741A publication Critical patent/GB1342741A/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
    • E21D15/50—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)
GB353170A 1970-01-24 1970-01-24 Expired GB1342741A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1342741A true GB1342741A (enrdf_load_stackoverflow) 1974-01-03

Family

ID=9760089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB353170A Expired GB1342741A (enrdf_load_stackoverflow) 1970-01-24 1970-01-24

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115023533A (zh) * 2019-11-11 2022-09-06 J.雷.麦克德莫特股份有限公司 用于水下系统的破坏性联接系统和方法

Families Citing this family (3)

* 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 (de) * 1990-04-19 2002-04-25 Dbt Gmbh Ventilvorrichtung mit einem hydraulisch entsperrbaren Rückschlagventil für hydraulische Systeme des Bergbaus, wie vor allem für hydraulische Ausbausysteme

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115023533A (zh) * 2019-11-11 2022-09-06 J.雷.麦克德莫特股份有限公司 用于水下系统的破坏性联接系统和方法

Also Published As

Publication number Publication date
ZA711598B (en) 1971-12-29
DE2042295A1 (de) 1972-05-31

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees