BE552440A - - Google Patents

Info

Publication number
BE552440A
BE552440A BE552440DA BE552440A BE 552440 A BE552440 A BE 552440A BE 552440D A BE552440D A BE 552440DA BE 552440 A BE552440 A BE 552440A
Authority
BE
Belgium
Application number
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.)
Publication of BE552440A publication Critical patent/BE552440A/xx

Links

Classifications

    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/122—Valves; Arrangement of valves arranged in or on pistons the piston being free-floating, e.g. the valve being formed between the actuating rod and the piston
    • 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
    • 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
    • E21D15/60—Devices for withdrawing props or chocks
    • E21D15/603—Devices for withdrawing props or chocks by means of hydraulic devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0069—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices without essential advancing shifting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Prostheses (AREA)
  • Pens And Brushes (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Jet Pumps And Other Pumps (AREA)
BE552440D 1955-12-13 BE552440A (en(2012))

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE11676A DE1032200B (de) 1955-12-13 1955-12-13 Hydraulisch betriebenes Stuetzelement

Publications (1)

Publication Number Publication Date
BE552440A true BE552440A (en(2012))

Family

ID=7068144

Family Applications (1)

Application Number Title Priority Date Filing Date
BE552440D BE552440A (en(2012)) 1955-12-13

Country Status (5)

Country Link
US (1) US3012404A (en(2012))
BE (1) BE552440A (en(2012))
DE (1) DE1032200B (en(2012))
FR (1) FR1167822A (en(2012))
GB (1) GB816247A (en(2012))

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712758A (en) * 1970-09-10 1973-01-23 Int Harvester Co Variable displacement pump
US3882761A (en) * 1973-11-14 1975-05-13 Joseph D Snitgen Fluid stop mechanism

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US16801A (en) * 1857-03-10 George lindsay
US205674A (en) * 1878-07-02 Improvement in hydraulic jacks
US868868A (en) * 1907-04-05 1907-10-22 Peter Kiefer Air-motor.
US1624151A (en) * 1925-07-14 1927-04-12 Aladdin Hydraulic Jack Company Hydraulic jack
US1656430A (en) * 1926-03-16 1928-01-17 Herman D Eberle Hydraulic jack
US1745067A (en) * 1928-10-30 1930-01-28 Erie Hydraulic Mfg Company Hydraulic jack
DE510708C (de) * 1929-02-05 1930-10-22 Albert Hamel Abbaukammer mit in der Hoehe einstellbarem Dach
US2119440A (en) * 1935-12-23 1938-05-31 Timothy C Pomeroy Hydraulic jack
BE486663A (en(2012)) * 1948-01-12
DE924686C (de) * 1951-11-30 1955-03-07 Emil Weber Hydraulische Setzvorrichtung fuer Stempel

Also Published As

Publication number Publication date
GB816247A (en) 1959-07-08
FR1167822A (fr) 1958-12-01
US3012404A (en) 1961-12-12
DE1032200B (de) 1958-06-19

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