FR67964E - Improvements to devices such as props - Google Patents

Improvements to devices such as props

Info

Publication number
FR67964E
FR67964E FR67964DA FR67964E FR 67964 E FR67964 E FR 67964E FR 67964D A FR67964D A FR 67964DA FR 67964 E FR67964 E FR 67964E
Authority
FR
France
Prior art keywords
props
devices
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Application granted granted Critical
Publication of FR67964E publication Critical patent/FR67964E/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
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators

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)
  • Actuator (AREA)
FR67964D 1954-12-14 1955-06-28 Improvements to devices such as props Expired FR67964E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1116525T 1954-12-14

Publications (1)

Publication Number Publication Date
FR67964E true FR67964E (en) 1958-03-26

Family

ID=9629503

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1116525D Expired FR1116525A (en) 1954-12-14 1954-12-14 Improvements to devices such as props
FR67964D Expired FR67964E (en) 1954-12-14 1955-06-28 Improvements to devices such as props

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1116525D Expired FR1116525A (en) 1954-12-14 1954-12-14 Improvements to devices such as props

Country Status (3)

Country Link
BE (1) BE542887A (en)
FR (2) FR1116525A (en)
GB (1) GB796827A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB902188A (en) * 1960-04-09 1962-07-25 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic supports
GB898987A (en) * 1960-04-19 1962-06-20 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic supports

Also Published As

Publication number Publication date
FR1116525A (en) 1956-05-08
BE542887A (en)
GB796827A (en) 1958-06-18

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