GB1430240A - Mine roof support - Google Patents

Mine roof support

Info

Publication number
GB1430240A
GB1430240A GB3439372A GB3439372A GB1430240A GB 1430240 A GB1430240 A GB 1430240A GB 3439372 A GB3439372 A GB 3439372A GB 3439372 A GB3439372 A GB 3439372A GB 1430240 A GB1430240 A GB 1430240A
Authority
GB
United Kingdom
Prior art keywords
valve
frame
outlets
roof support
mine roof
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
GB3439372A
Other languages
English (en)
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to GB3439372A priority Critical patent/GB1430240A/en
Priority to ZA734686A priority patent/ZA734686B/xx
Priority to PL1973164201A priority patent/PL91078B1/pl
Priority to DE19732337390 priority patent/DE2337390B2/de
Publication of GB1430240A publication Critical patent/GB1430240A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Safety Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
GB3439372A 1972-07-22 1972-07-22 Mine roof support Expired GB1430240A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3439372A GB1430240A (en) 1972-07-22 1972-07-22 Mine roof support
ZA734686A ZA734686B (en) 1972-07-22 1973-07-11 Mine roof supports
PL1973164201A PL91078B1 (enExample) 1972-07-22 1973-07-20
DE19732337390 DE2337390B2 (de) 1972-07-22 1973-07-23 Grubenausbaurahmen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3439372A GB1430240A (en) 1972-07-22 1972-07-22 Mine roof support

Publications (1)

Publication Number Publication Date
GB1430240A true GB1430240A (en) 1976-03-31

Family

ID=10365098

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3439372A Expired GB1430240A (en) 1972-07-22 1972-07-22 Mine roof support

Country Status (4)

Country Link
DE (1) DE2337390B2 (enExample)
GB (1) GB1430240A (enExample)
PL (1) PL91078B1 (enExample)
ZA (1) ZA734686B (enExample)

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
DE3340888C1 (de) * 1983-11-11 1985-02-07 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Hydraulischer Stempel mit Gebirgsschlagventil für ein Schreitausbaugestell
CN109322689B (zh) * 2018-10-31 2024-06-25 辽宁工程技术大学 一种防冲液压支架用压力流量函数控制阀组

Also Published As

Publication number Publication date
PL91078B1 (enExample) 1977-02-28
DE2337390A1 (de) 1974-02-07
DE2337390B2 (de) 1977-11-10
ZA734686B (en) 1974-06-26

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Legal Events

Date Code Title Description
PS Patent sealed

Free format text: IN PAT.BUL. 4565, PAGE 2838; FOR 1420240 READ 1430240

PCNP Patent ceased through non-payment of renewal fee