GB2168409B - Hydraulic ram extension measuring device - Google Patents

Hydraulic ram extension measuring device

Info

Publication number
GB2168409B
GB2168409B GB08431719A GB8431719A GB2168409B GB 2168409 B GB2168409 B GB 2168409B GB 08431719 A GB08431719 A GB 08431719A GB 8431719 A GB8431719 A GB 8431719A GB 2168409 B GB2168409 B GB 2168409B
Authority
GB
United Kingdom
Prior art keywords
measuring device
hydraulic ram
extension measuring
ram extension
hydraulic
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
GB08431719A
Other versions
GB2168409A (en
GB8431719D0 (en
Inventor
Richard Ward
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.)
Joy Global Industries Ltd
Original Assignee
Dobson Park Industries 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 Dobson Park Industries Ltd filed Critical Dobson Park Industries Ltd
Priority to GB08431719A priority Critical patent/GB2168409B/en
Publication of GB8431719D0 publication Critical patent/GB8431719D0/en
Publication of GB2168409A publication Critical patent/GB2168409A/en
Application granted granted Critical
Publication of GB2168409B publication Critical patent/GB2168409B/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)
  • Geophysics And Detection Of Objects (AREA)
GB08431719A 1984-12-15 1984-12-15 Hydraulic ram extension measuring device Expired GB2168409B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08431719A GB2168409B (en) 1984-12-15 1984-12-15 Hydraulic ram extension measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08431719A GB2168409B (en) 1984-12-15 1984-12-15 Hydraulic ram extension measuring device

Publications (3)

Publication Number Publication Date
GB8431719D0 GB8431719D0 (en) 1985-01-30
GB2168409A GB2168409A (en) 1986-06-18
GB2168409B true GB2168409B (en) 1988-06-08

Family

ID=10571258

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08431719A Expired GB2168409B (en) 1984-12-15 1984-12-15 Hydraulic ram extension measuring device

Country Status (1)

Country Link
GB (1) GB2168409B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9105699D0 (en) * 1991-03-18 1991-05-01 British Gas Plc Supplying fluid
GB2581983B (en) * 2019-03-06 2021-07-21 Caterpillar Global Mining Gmbh Method and device for monitoring operation of a mining machine unit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1010872A (en) * 1962-10-10 1965-11-24 Dowty Mining Equipment Ltd Roof support assembly suitable for use in mines
GB1110831A (en) * 1964-12-22 1968-04-24 Coal Industry Patents Ltd Flow meter monitoring of a system of mine roof supports
SE408094B (en) * 1977-09-26 1979-05-14 Fluid Inventor Ab A FLOWING MEDIUM METHODING DEVICE

Also Published As

Publication number Publication date
GB2168409A (en) 1986-06-18
GB8431719D0 (en) 1985-01-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee