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)
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 (fr)
DE (1) DE1145122B (fr)
FR (1) FR1249070A (fr)
NL (1) NL248713A (fr)

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 (fr) * 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
NL230401A (fr) * 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
DE1145122B (de) 1963-03-14
US3000358A (en) 1961-09-19
NL248713A (fr)

Similar Documents

Publication Publication Date Title
FR1178174A (fr) étançon hydraulique pour mine
FR1190532A (fr) Perfectionnements apportés aux supports de plafonds pour mines souterraines
BE589113A (fr) Perfectionnements apportes aux elements de hydraulique pour .
FR1176882A (fr) Perfectionnements apportés aux étançons de mine hydrauliques
FR1245273A (fr) Perfectionnements aux servo-valves hydrauliques
FR1249070A (fr) Perfectionnements aux étais hydrauliques pour mines
FR1220890A (fr) Perfectionnements aux reniflards pour étais de mine
FR1207923A (fr) Perfectionnements apportés aux étançons hydrauliques de mines
FR1174801A (fr) étançon hydraulique pour mines
FR1197629A (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
FR1321725A (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
FR1247864A (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
BE602739A (fr) Perfectionnements relatifs aux étais hydrauliques
FR1248352A (fr) étai hydraulique de mine
FR85958E (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
FR1187688A (fr) Perfectionnements aux étais hydrauliques pour mines
FR1175841A (fr) Perfectionnements relatifs aux étais hydrauliques de mines
FR1281058A (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
FR1221309A (fr) Perfectionnements aux pompes pour étais hydrauliques de mines
FR82957E (fr) Perfectionnements aux commandes hydrauliques
FR80566E (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
FR1173246A (fr) Perfectionnements apportés aux étançons hydrauliques pour mines
FR1176539A (fr) Perfectionnements apportés aux étançons de mine hydrauliques
FR1177929A (fr) Perfectionnements apportés aux étançons de mine hydrauliques
FR1340921A (fr) Perfectionnements aux soutènements métalliques pour ouvrages souterrains