FR93738E - Telescopic mine prop with hydraulic movement and friction lock. - Google Patents

Telescopic mine prop with hydraulic movement and friction lock.

Info

Publication number
FR93738E
FR93738E FR136733A FR136733A FR93738E FR 93738 E FR93738 E FR 93738E FR 136733 A FR136733 A FR 136733A FR 136733 A FR136733 A FR 136733A FR 93738 E FR93738 E FR 93738E
Authority
FR
France
Prior art keywords
friction lock
hydraulic movement
mine prop
telescopic
telescopic mine
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
FR136733A
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DEG42447A external-priority patent/DE1227409B/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of FR93738E publication Critical patent/FR93738E/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
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

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)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
FR136733A 1964-12-31 1968-01-19 Telescopic mine prop with hydraulic movement and friction lock. Expired FR93738E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG42447A DE1227409B (en) 1964-12-31 1964-12-31 Hydraulically extendable and friction-locked telescopic pit ram
DEG49031A DE1256609B (en) 1964-12-31 1967-01-19 Hydraulically extendable and friction-locked telescopic pit ram

Publications (1)

Publication Number Publication Date
FR93738E true FR93738E (en) 1969-05-09

Family

ID=7128847

Family Applications (1)

Application Number Title Priority Date Filing Date
FR136733A Expired FR93738E (en) 1964-12-31 1968-01-19 Telescopic mine prop with hydraulic movement and friction lock.

Country Status (2)

Country Link
DE (1) DE1256609B (en)
FR (1) FR93738E (en)

Also Published As

Publication number Publication date
DE1256609B (en) 1967-12-21

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