FR1308403A - telescopic hydraulic prop - Google Patents

telescopic hydraulic prop

Info

Publication number
FR1308403A
FR1308403A FR882695A FR882695A FR1308403A FR 1308403 A FR1308403 A FR 1308403A FR 882695 A FR882695 A FR 882695A FR 882695 A FR882695 A FR 882695A FR 1308403 A FR1308403 A FR 1308403A
Authority
FR
France
Prior art keywords
telescopic hydraulic
hydraulic prop
prop
telescopic
hydraulic
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
FR882695A
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment Ltd
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 GB44098/60A external-priority patent/GB954676A/en
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to FR882695A priority Critical patent/FR1308403A/en
Application granted granted Critical
Publication of FR1308403A publication Critical patent/FR1308403A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
    • 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)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
FR882695A 1960-12-22 1961-12-21 telescopic hydraulic prop Expired FR1308403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR882695A FR1308403A (en) 1960-12-22 1961-12-21 telescopic hydraulic prop

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB44098/60A GB954676A (en) 1960-12-22 1960-12-22 Telescopic hydraulic props
FR882695A FR1308403A (en) 1960-12-22 1961-12-21 telescopic hydraulic prop

Publications (1)

Publication Number Publication Date
FR1308403A true FR1308403A (en) 1962-11-03

Family

ID=26193622

Family Applications (1)

Application Number Title Priority Date Filing Date
FR882695A Expired FR1308403A (en) 1960-12-22 1961-12-21 telescopic hydraulic prop

Country Status (1)

Country Link
FR (1) FR1308403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2783318C1 (en) * 2022-05-27 2022-11-11 Акционерное общество "Научно-производственное предприятие "Радар ммс" Friction grip of the power cylinder rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2783318C1 (en) * 2022-05-27 2022-11-11 Акционерное общество "Научно-производственное предприятие "Радар ммс" Friction grip of the power cylinder rod

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