FR1463003A - Prolongement de la tête de l'étançon - Google Patents

Prolongement de la tête de l'étançon

Info

Publication number
FR1463003A
FR1463003A FR25946A FR25946A FR1463003A FR 1463003 A FR1463003 A FR 1463003A FR 25946 A FR25946 A FR 25946A FR 25946 A FR25946 A FR 25946A FR 1463003 A FR1463003 A FR 1463003A
Authority
FR
France
Prior art keywords
prop
extension
head
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
FR25946A
Other languages
English (en)
Inventor
Josef Welzel
Hans Buell
Alfred Maykemper
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
Hermann Hemscheidit Maschinenfabrik GmbH and Co
Original Assignee
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Hermann Hemscheidit 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, Hermann Hemscheidit Maschinenfabrik GmbH and Co filed Critical Hemscheidt Hermann Maschinenfabrik GmbH and Co
Priority to FR25946A priority Critical patent/FR1463003A/fr
Application granted granted Critical
Publication of FR1463003A publication Critical patent/FR1463003A/fr
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
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/526—Extensible units located above or below standard props for step-by-step extension of the prop

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)
FR25946A 1965-07-26 1965-07-26 Prolongement de la tête de l'étançon Expired FR1463003A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR25946A FR1463003A (fr) 1965-07-26 1965-07-26 Prolongement de la tête de l'étançon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR25946A FR1463003A (fr) 1965-07-26 1965-07-26 Prolongement de la tête de l'étançon

Publications (1)

Publication Number Publication Date
FR1463003A true FR1463003A (fr) 1966-06-03

Family

ID=8585229

Family Applications (1)

Application Number Title Priority Date Filing Date
FR25946A Expired FR1463003A (fr) 1965-07-26 1965-07-26 Prolongement de la tête de l'étançon

Country Status (1)

Country Link
FR (1) FR1463003A (fr)

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