FR1113337A - étançon hydraulique - Google Patents

étançon hydraulique

Info

Publication number
FR1113337A
FR1113337A FR1113337DA FR1113337A FR 1113337 A FR1113337 A FR 1113337A FR 1113337D A FR1113337D A FR 1113337DA FR 1113337 A FR1113337 A FR 1113337A
Authority
FR
France
Prior art keywords
hydraulic prop
prop
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
Other languages
English (en)
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 AUTO UNITS Ltd
Original Assignee
DOWTY AUTO UNITS 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 AUTO UNITS Ltd filed Critical DOWTY AUTO UNITS Ltd
Application granted granted Critical
Publication of FR1113337A publication Critical patent/FR1113337A/fr
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
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning devices
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87378—Second valve assembly carried by first valve head

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)
  • Reciprocating Pumps (AREA)
  • Chairs Characterized By Structure (AREA)
  • Safety Valves (AREA)
  • Massaging Devices (AREA)
FR1113337D 1953-09-24 1954-09-23 étançon hydraulique Expired FR1113337A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26349/53A GB748374A (en) 1953-09-24 1953-09-24 Improvements in hydraulic pit props

Publications (1)

Publication Number Publication Date
FR1113337A true FR1113337A (fr) 1956-03-28

Family

ID=10242283

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1113337D Expired FR1113337A (fr) 1953-09-24 1954-09-23 étançon hydraulique

Country Status (6)

Country Link
US (1) US2713773A (fr)
BE (1) BE532039A (fr)
DE (1) DE977481C (fr)
FR (1) FR1113337A (fr)
GB (1) GB748374A (fr)
NL (2) NL92057C (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE553227A (fr) * 1955-06-10
DE1127841B (de) * 1955-08-13 1962-04-19 Kronprinz Ag Hydraulischer Grubenstempel
BE553228A (fr) * 1955-12-08
NL211784A (fr) * 1956-03-07
US2975803A (en) * 1956-04-19 1961-03-21 Blackhawk Mfg Co Pressure release and relief valve
DE1081848B (de) * 1956-06-28 1960-05-19 Becorit Grubenausbau Gmbh Hydraulischer Grubenstempel
GB894292A (en) * 1957-07-30 1962-04-18 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic props, particularly pit props
NL233516A (fr) * 1958-11-24 1965-06-25
GB962542A (en) * 1959-08-21 1964-07-01 Acrow Eng Ltd Improvements in and relating to hydraulic props
GB975826A (en) * 1961-01-31 1964-11-18 Dowty Mining Equipment Ltd Improvements relating to fluid flow control valves
GB2069048B (en) * 1980-01-21 1984-06-06 Commercial Shearing Longwall jacks
EP0938692A4 (fr) * 1996-10-04 1999-12-29 Charles W Jones Livre stereographique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE553221C (de) * 1932-06-24 Matthias Rehse Kolbentiefpumpe
US947613A (en) * 1910-01-25 Bethlehem Steel Corp Hydraulic jack.
US1047007A (en) * 1912-02-02 1912-12-10 William J Drugan Hydraulic jack.
US1080062A (en) * 1912-02-17 1913-12-02 Bethlehem Steel Corp Pump mechanism for hydraulic jacks and like apparatus.
BE486663A (fr) * 1948-01-12
GB640414A (en) * 1948-03-06 1950-07-19 Mavor & Coulson Ltd Improvements in props
DE943391C (de) * 1951-09-21 1956-05-17 Max Ehmke Pumpe mit Druckmittelantrieb

Also Published As

Publication number Publication date
DE977481C (de) 1966-08-18
US2713773A (en) 1955-07-26
BE532039A (fr) 1900-01-01
GB748374A (en) 1956-05-02
NL92057C (fr) 1900-01-01
NL191038A (fr) 1900-01-01

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