FR395517A - Étancon pour mines - Google Patents

Étancon pour mines

Info

Publication number
FR395517A
FR395517A FR395517DA FR395517A FR 395517 A FR395517 A FR 395517A FR 395517D A FR395517D A FR 395517DA FR 395517 A FR395517 A FR 395517A
Authority
FR
France
Prior art keywords
mining prop
prop
mining
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
English (en)
Inventor
John H. Eickershoff
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.)
JOHN H EICKERSHOFF
Original Assignee
JOHN H EICKERSHOFF
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 JOHN H EICKERSHOFF filed Critical JOHN H EICKERSHOFF
Application granted granted Critical
Publication of FR395517A publication Critical patent/FR395517A/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
    • E21D15/14—Telescopic props
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure

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)
FR395517D 1908-10-20 1908-10-20 Étancon pour mines Expired FR395517A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR395517T 1908-10-20

Publications (1)

Publication Number Publication Date
FR395517A true FR395517A (fr) 1909-03-04

Family

ID=1440687

Family Applications (1)

Application Number Title Priority Date Filing Date
FR395517D Expired FR395517A (fr) 1908-10-20 1908-10-20 Étancon pour mines

Country Status (1)

Country Link
FR (1) FR395517A (fr)

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