FR1093576A - Improvements to telescopic props and the like, especially for mines - Google Patents

Improvements to telescopic props and the like, especially for mines

Info

Publication number
FR1093576A
FR1093576A FR1093576DA FR1093576A FR 1093576 A FR1093576 A FR 1093576A FR 1093576D A FR1093576D A FR 1093576DA FR 1093576 A FR1093576 A FR 1093576A
Authority
FR
France
Prior art keywords
mines
telescopic props
props
telescopic
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
Other languages
French (fr)
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.)
HOLLYBANK ENG CO
Original Assignee
HOLLYBANK ENG 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 HOLLYBANK ENG CO filed Critical HOLLYBANK ENG CO
Application granted granted Critical
Publication of FR1093576A publication Critical patent/FR1093576A/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
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/588—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded the lock also being activated

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)
FR1093576D 1953-11-09 1953-11-09 Improvements to telescopic props and the like, especially for mines Expired FR1093576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1093576T 1953-11-09

Publications (1)

Publication Number Publication Date
FR1093576A true FR1093576A (en) 1955-05-06

Family

ID=9616562

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1093576D Expired FR1093576A (en) 1953-11-09 1953-11-09 Improvements to telescopic props and the like, especially for mines

Country Status (1)

Country Link
FR (1) FR1093576A (en)

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