FR1221309A - Improvements to pumps for hydraulic mine props - Google Patents

Improvements to pumps for hydraulic mine props

Info

Publication number
FR1221309A
FR1221309A FR789074A FR789074A FR1221309A FR 1221309 A FR1221309 A FR 1221309A FR 789074 A FR789074 A FR 789074A FR 789074 A FR789074 A FR 789074A FR 1221309 A FR1221309 A FR 1221309A
Authority
FR
France
Prior art keywords
pumps
mine props
hydraulic mine
hydraulic
props
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
FR789074A
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
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Application granted granted Critical
Publication of FR1221309A publication Critical patent/FR1221309A/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)
  • Details Of Reciprocating Pumps (AREA)
FR789074A 1958-03-13 1959-03-11 Improvements to pumps for hydraulic mine props Expired FR1221309A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB813958A GB879335A (en) 1958-03-13 1958-03-13 Improvements in or relating to pumps especially for hydraulic pit props

Publications (1)

Publication Number Publication Date
FR1221309A true FR1221309A (en) 1960-06-01

Family

ID=9846495

Family Applications (1)

Application Number Title Priority Date Filing Date
FR789074A Expired FR1221309A (en) 1958-03-13 1959-03-11 Improvements to pumps for hydraulic mine props

Country Status (3)

Country Link
DE (1) DE1224683B (en)
FR (1) FR1221309A (en)
GB (1) GB879335A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744654A1 (en) 1976-10-05 1978-04-06 Creative Dispensing Systems DEVICE AND METHOD FOR ATOMIZING A LIQUID

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR551644A (en) * 1921-09-12 1923-04-10 Low flow pump
GB194172A (en) * 1922-04-04 1923-03-08 Albert Hosier Whatley Improvements in hydraulic pumps
GB561285A (en) * 1942-12-02 1944-05-12 James Langdon An improved hand operated reciprocating pump
FR1034131A (en) * 1951-03-19 1953-07-20 Advanced lifting cylinder
US2674262A (en) * 1951-03-30 1954-04-06 William D Bradshaw Rate of flow valve
GB754484A (en) * 1953-05-11 1956-08-08 Schafer Industriegesellschaft Improvements in or relating to pistons for the master control cylinders of hydrauliccontrol systems
US2776624A (en) * 1953-06-02 1957-01-08 Foremost Dairies Inc Multiple piston hydraulic pump unit and operating means to selectively operate the pistons thereof
BE557124A (en) * 1956-05-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744654A1 (en) 1976-10-05 1978-04-06 Creative Dispensing Systems DEVICE AND METHOD FOR ATOMIZING A LIQUID
DE2760216C2 (en) * 1976-10-05 1990-03-22 Specialty Packaging Prod Inc

Also Published As

Publication number Publication date
GB879335A (en) 1961-10-11
DE1224683B (en) 1966-09-15

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