GB1303752A - - Google Patents

Info

Publication number
GB1303752A
GB1303752A GB1981070A GB1981070A GB1303752A GB 1303752 A GB1303752 A GB 1303752A GB 1981070 A GB1981070 A GB 1981070A GB 1981070 A GB1981070 A GB 1981070A GB 1303752 A GB1303752 A GB 1303752A
Authority
GB
United Kingdom
Prior art keywords
props
valves
throttle
april
bores
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
GB1981070A
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 GB1303752A publication Critical patent/GB1303752A/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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/26—Hydraulic or pneumatic control

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)
  • Fluid-Pressure Circuits (AREA)
  • Taps Or Cocks (AREA)
GB1981070A 1969-04-24 1970-04-24 Expired GB1303752A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691920858 DE1920858A1 (de) 1969-04-24 1969-04-24 Ausgleichs-Steuerventilvorrichtung

Publications (1)

Publication Number Publication Date
GB1303752A true GB1303752A (de) 1973-01-17

Family

ID=5732193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1981070A Expired GB1303752A (de) 1969-04-24 1970-04-24

Country Status (3)

Country Link
DE (1) DE1920858A1 (de)
FR (1) FR2043221A5 (de)
GB (1) GB1303752A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138110A (en) * 1983-04-13 1984-10-17 Drallim Ind Improvement in and relating to control valves
GB2289930A (en) * 1994-06-01 1995-12-06 Core Ind Inc Duplex strainer
RU2570485C2 (ru) * 2013-03-05 2015-12-10 Данфосс А/С Клапанное устройство теплообменника

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605758B1 (de) * 1976-02-13 1977-07-21 Hemscheidt Maschf Hermann Steuerventil fuer hydraulisch schreitenden strebausbau
DE4321647A1 (de) * 1993-06-30 1995-01-12 Suspa Compart Ag Umschalt-Ventil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138110A (en) * 1983-04-13 1984-10-17 Drallim Ind Improvement in and relating to control valves
GB2289930A (en) * 1994-06-01 1995-12-06 Core Ind Inc Duplex strainer
GB2289930B (en) * 1994-06-01 1998-01-28 Core Ind Inc Duplex strainer
RU2570485C2 (ru) * 2013-03-05 2015-12-10 Данфосс А/С Клапанное устройство теплообменника

Also Published As

Publication number Publication date
DE1920858A1 (de) 1970-11-19
FR2043221A5 (de) 1971-02-12

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Legal Events

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