FR78068E - Multi-part hydraulic telescopic mine prop - Google Patents

Multi-part hydraulic telescopic mine prop

Info

Publication number
FR78068E
FR78068E FR829707A FR829707A FR78068E FR 78068 E FR78068 E FR 78068E FR 829707 A FR829707 A FR 829707A FR 829707 A FR829707 A FR 829707A FR 78068 E FR78068 E FR 78068E
Authority
FR
France
Prior art keywords
hydraulic telescopic
part hydraulic
mine prop
telescopic mine
prop
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
FR829707A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade AG
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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Priority to FR829707A priority Critical patent/FR78068E/en
Application granted granted Critical
Publication of FR78068E publication Critical patent/FR78068E/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
    • E21D15/512—Arrangement of valves

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)
FR829707A 1960-06-11 1960-06-11 Multi-part hydraulic telescopic mine prop Expired FR78068E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR829707A FR78068E (en) 1960-06-11 1960-06-11 Multi-part hydraulic telescopic mine prop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR829707A FR78068E (en) 1960-06-11 1960-06-11 Multi-part hydraulic telescopic mine prop

Publications (1)

Publication Number Publication Date
FR78068E true FR78068E (en) 1962-06-01

Family

ID=8733197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR829707A Expired FR78068E (en) 1960-06-11 1960-06-11 Multi-part hydraulic telescopic mine prop

Country Status (1)

Country Link
FR (1) FR78068E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322319A1 (en) * 1975-08-23 1977-03-25 Saarbergwerke Ag RELIEF VALVE CONNECTING THE TWO CYLINDERS OF A TWO-STAGE TELESCOPIC HYDRAULIC SEAL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322319A1 (en) * 1975-08-23 1977-03-25 Saarbergwerke Ag RELIEF VALVE CONNECTING THE TWO CYLINDERS OF A TWO-STAGE TELESCOPIC HYDRAULIC SEAL

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