GB894519A - Improvements in mine supports - Google Patents

Improvements in mine supports

Info

Publication number
GB894519A
GB894519A GB32671/59A GB3267159A GB894519A GB 894519 A GB894519 A GB 894519A GB 32671/59 A GB32671/59 A GB 32671/59A GB 3267159 A GB3267159 A GB 3267159A GB 894519 A GB894519 A GB 894519A
Authority
GB
United Kingdom
Prior art keywords
sleeve
bearing
hemscheidt
collar
ram
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
GB32671/59A
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.)
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Original Assignee
Hemscheidt Hermann Maschinenfabrik GmbH and Co
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 Hemscheidt Hermann Maschinenfabrik GmbH and Co filed Critical Hemscheidt Hermann Maschinenfabrik GmbH and Co
Publication of GB894519A publication Critical patent/GB894519A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

894,519. Hydraulic pit props. HEMSCHEIDT, H., [trading as HEMSCHEIDT MASCHINENFABRIK, HERMANN], Sept. 25, 1959 [Dec. 13, 1958], No. 32671/59. Class 20(2) A mine prop which is adjusted hydraulically and mechanically comprises a bearing sleeve 9 supported on a ram 8 which is moved in a cylinder 7 by fluid pressure supplied through a pipe 12. The cylinder is suspended from an outer sleeve 5 bearing on a collar 4 which is adjustably clamped on a tubular support 3. It is possible to lift the sleeve 5 with a portable jack acting on the abutment 15 so that intermediate members may be inserted between the collar and the sleeve to increase the height of the prop. Two props may be connected by a bar 2 and rotation of the bearing sleeve 9 about the ram is prevented by a pin 14.
GB32671/59A 1959-12-13 1959-09-25 Improvements in mine supports Expired GB894519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE894519X 1959-12-13

Publications (1)

Publication Number Publication Date
GB894519A true GB894519A (en) 1962-04-26

Family

ID=6847203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32671/59A Expired GB894519A (en) 1959-12-13 1959-09-25 Improvements in mine supports

Country Status (1)

Country Link
GB (1) GB894519A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102678140A (en) * 2012-05-30 2012-09-19 山西东华机械有限公司 Rotation device of hydraulic support retraction machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102678140A (en) * 2012-05-30 2012-09-19 山西东华机械有限公司 Rotation device of hydraulic support retraction machine
CN102678140B (en) * 2012-05-30 2014-06-18 山西东华机械有限公司 Rotation device of hydraulic support retraction machine

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