GB8803352D0 - Valve means - Google Patents

Valve means

Info

Publication number
GB8803352D0
GB8803352D0 GB888803352A GB8803352A GB8803352D0 GB 8803352 D0 GB8803352 D0 GB 8803352D0 GB 888803352 A GB888803352 A GB 888803352A GB 8803352 A GB8803352 A GB 8803352A GB 8803352 D0 GB8803352 D0 GB 8803352D0
Authority
GB
United Kingdom
Prior art keywords
valve means
valve
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.)
Withdrawn
Application number
GB888803352A
Other versions
GB2214988A (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.)
Gullick Dobson Ltd
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
Priority to GB8803352A priority Critical patent/GB2214988A/en
Publication of GB8803352D0 publication Critical patent/GB8803352D0/en
Publication of GB2214988A publication Critical patent/GB2214988A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
GB8803352A 1988-02-13 1988-02-13 Control system for hydraulic mine roof support Withdrawn GB2214988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8803352A GB2214988A (en) 1988-02-13 1988-02-13 Control system for hydraulic mine roof support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8803352A GB2214988A (en) 1988-02-13 1988-02-13 Control system for hydraulic mine roof support

Publications (2)

Publication Number Publication Date
GB8803352D0 true GB8803352D0 (en) 1988-03-16
GB2214988A GB2214988A (en) 1989-09-13

Family

ID=10631653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8803352A Withdrawn GB2214988A (en) 1988-02-13 1988-02-13 Control system for hydraulic mine roof support

Country Status (1)

Country Link
GB (1) GB2214988A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309325A1 (en) 2003-03-04 2004-09-16 Bts Media Solutions Gmbh Device for compensating fluctuations in a light source and film scanner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2146502C3 (en) * 1971-09-17 1982-04-29 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Valve arrangement for setting hydraulic pit rams with high setting force
DE2158870C2 (en) * 1971-11-27 1973-09-27 Eaton Gmbh, 5620 Velbert Hydraulic servo system with two pumps and several hydraulic motors
DE2341892C3 (en) * 1973-08-18 1978-09-14 Eaton Gmbh, 5620 Velbert Hydraulic servo system with two pumps and several hydraulic motors
GB2116618B (en) * 1982-03-06 1985-11-20 Dowty Mining Equipment Ltd Mine roof supports

Also Published As

Publication number Publication date
GB2214988A (en) 1989-09-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)