FR1249070A - Perfectionnements aux étais hydrauliques pour mines - Google Patents

Perfectionnements aux étais hydrauliques pour mines

Info

Publication number
FR1249070A
FR1249070A FR819351A FR819351A FR1249070A FR 1249070 A FR1249070 A FR 1249070A FR 819351 A FR819351 A FR 819351A FR 819351 A FR819351 A FR 819351A FR 1249070 A FR1249070 A FR 1249070A
Authority
FR
France
Prior art keywords
mines
hydraulic props
props
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
FR819351A
Other languages
English (en)
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 GB618959A external-priority patent/GB901168A/en
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Application granted granted Critical
Publication of FR1249070A publication Critical patent/FR1249070A/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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

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)
  • Safety Valves (AREA)
FR819351A 1959-02-23 1960-02-23 Perfectionnements aux étais hydrauliques pour mines Expired FR1249070A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB618959A GB901168A (en) 1959-02-23 1959-02-23 Improvements in hydraulic props or struts
GB1755159 1959-05-22

Publications (1)

Publication Number Publication Date
FR1249070A true FR1249070A (fr) 1960-12-23

Family

ID=26240510

Family Applications (1)

Application Number Title Priority Date Filing Date
FR819351A Expired FR1249070A (fr) 1959-02-23 1960-02-23 Perfectionnements aux étais hydrauliques pour mines

Country Status (4)

Country Link
US (1) US3000358A (instruction)
DE (1) DE1145122B (instruction)
FR (1) FR1249070A (instruction)
NL (1) NL248713A (instruction)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281107A (en) * 1965-12-15 1966-10-25 Ohio Brass Co Hydraulic support prop

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1026411A (en) * 1962-05-07 1966-04-20 Lansing Bagnall Ltd Improvements in or relating to industrial trucks
GB1022469A (en) * 1964-02-11 1966-03-16 Dowty Mining Equipment Ltd Roof support assembly suitable for use in mines

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1699917A (en) * 1924-11-08 1929-01-22 Jeremiah E Madden Hydraulic apparatus
US1899534A (en) * 1930-05-05 1933-02-28 Curtis Mfg Co Automobile lift
US2402265A (en) * 1945-02-15 1946-06-18 Globe Hoist Co Vehicle lift
BE486663A (instruction) * 1948-01-12
GB640414A (en) * 1948-03-06 1950-07-19 Mavor & Coulson Ltd Improvements in props
DE928945C (de) * 1951-06-09 1955-06-16 Eisenwerk Wanheim G M B H Verstellbarer hydraulischer Grubenstempel
DE1044003B (de) * 1952-06-16 1958-11-20 Mining Engineering Co Ltd Hydraulische Hangendtragvorrichtung bzw. Grubenstempel
DE1020945B (de) * 1955-03-14 1957-12-19 Ewald Wiemann Maschf Setz- und Raubventil fuer hydraulische Grubenstempel
BE570316A (instruction) * 1957-08-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281107A (en) * 1965-12-15 1966-10-25 Ohio Brass Co Hydraulic support prop

Also Published As

Publication number Publication date
NL248713A (instruction)
DE1145122B (de) 1963-03-14
US3000358A (en) 1961-09-19

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