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FR1164647A - Two-stage pump for hydraulic prop - Google Patents

Two-stage pump for hydraulic prop

Info

Publication number
FR1164647A
FR1164647A FR1164647DA FR1164647A FR 1164647 A FR1164647 A FR 1164647A FR 1164647D A FR1164647D A FR 1164647DA FR 1164647 A FR1164647 A FR 1164647A
Authority
FR
France
Prior art keywords
stage pump
hydraulic prop
prop
hydraulic
pump
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)
Inventor
Bernard Tebb
Clarence Herbert Perry
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.)
Mastabar Mining Equipment Co Ltd
Original Assignee
Mastabar Mining Equipment Co 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 Mastabar Mining Equipment Co Ltd filed Critical Mastabar Mining Equipment Co Ltd
Application granted granted Critical
Publication of FR1164647A publication Critical patent/FR1164647A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/18—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the effective cross-section of the working surface of the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14—Pumps characterised by muscle-power operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Actuator (AREA)
  • Details Of Reciprocating Pumps (AREA)
FR1164647D 1955-12-08 1956-12-06 Two-stage pump for hydraulic prop Expired FR1164647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35219/55A GB802804A (en) 1955-12-08 1955-12-08 Improvements in or relating to hydraulic pit props

Publications (1)

Publication Number Publication Date
FR1164647A true FR1164647A (en) 1958-10-13

Family

ID=10375225

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1164647D Expired FR1164647A (en) 1955-12-08 1956-12-06 Two-stage pump for hydraulic prop

Country Status (4)

Country Link
BE (1) BE553228A (en)
DE (1) DE1054402B (en)
FR (1) FR1164647A (en)
GB (1) GB802804A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962542A (en) * 1959-08-21 1964-07-01 Acrow Eng Ltd Improvements in and relating to hydraulic props
CN110307021B (en) * 2019-07-29 2024-01-12 石家庄博安煤矿机械制造有限公司 Hydraulic supporting device for coal mine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE526791A (en) * 1953-02-25
NL191038A (en) * 1953-09-24 1900-01-01

Also Published As

Publication number Publication date
BE553228A (en)
DE1054402B (en) 1959-04-09
GB802804A (en) 1958-10-15

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