GB2101662B - }hydraulically-operated devices} - Google Patents

}hydraulically-operated devices}

Info

Publication number
GB2101662B
GB2101662B GB08219438A GB8219438A GB2101662B GB 2101662 B GB2101662 B GB 2101662B GB 08219438 A GB08219438 A GB 08219438A GB 8219438 A GB8219438 A GB 8219438A GB 2101662 B GB2101662 B GB 2101662B
Authority
GB
United Kingdom
Prior art keywords
hydraulically
operated devices
operated
devices
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
GB08219438A
Other versions
GB2101662A (en
Inventor
Stephen Paul Cook
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 GB08219438A priority Critical patent/GB2101662B/en
Publication of GB2101662A publication Critical patent/GB2101662A/en
Application granted granted Critical
Publication of GB2101662B publication Critical patent/GB2101662B/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
    • E21D23/18—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms
    • E21D23/20—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms for sequential movement, e.g. one behind the other

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)
GB08219438A 1981-07-16 1982-07-05 }hydraulically-operated devices} Expired GB2101662B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08219438A GB2101662B (en) 1981-07-16 1982-07-05 }hydraulically-operated devices}

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8121999 1981-07-16
GB08219438A GB2101662B (en) 1981-07-16 1982-07-05 }hydraulically-operated devices}

Publications (2)

Publication Number Publication Date
GB2101662A GB2101662A (en) 1983-01-19
GB2101662B true GB2101662B (en) 1984-09-05

Family

ID=26280151

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08219438A Expired GB2101662B (en) 1981-07-16 1982-07-05 }hydraulically-operated devices}

Country Status (1)

Country Link
GB (1) GB2101662B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304982C2 (en) * 1982-05-08 1984-09-13 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Hydraulic control for a walking frame
DE3546278C1 (en) * 1985-12-28 1987-07-02 Bergwerksverband Gmbh Repositioning control for longwall construction

Also Published As

Publication number Publication date
GB2101662A (en) 1983-01-19

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Legal Events

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