GB852354A - Improvements in or relating to props and like supports - Google Patents

Improvements in or relating to props and like supports

Info

Publication number
GB852354A
GB852354A GB21811/57A GB2181157A GB852354A GB 852354 A GB852354 A GB 852354A GB 21811/57 A GB21811/57 A GB 21811/57A GB 2181157 A GB2181157 A GB 2181157A GB 852354 A GB852354 A GB 852354A
Authority
GB
United Kingdom
Prior art keywords
float
liquid
chamber
july
bore
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
GB21811/57A
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.)
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
Original Assignee
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
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 EBERHARD VON CAMPENHAUSEN, WILLY EGGEMANN filed Critical EBERHARD VON CAMPENHAUSEN
Publication of GB852354A publication Critical patent/GB852354A/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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Actuator (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
GB21811/57A 1956-07-11 1957-07-10 Improvements in or relating to props and like supports Expired GB852354A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH20419A DE1024040B (de) 1956-07-11 1956-07-11 Absperrventil fuer einen mit Fluessigkeit gefuellten Druckraum bei Grubenausbaumitteln

Publications (1)

Publication Number Publication Date
GB852354A true GB852354A (en) 1960-10-26

Family

ID=7428760

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21811/57A Expired GB852354A (en) 1956-07-11 1957-07-10 Improvements in or relating to props and like supports

Country Status (5)

Country Link
US (1) US2912211A (ko)
BE (1) BE559110A (ko)
DE (1) DE1024040B (ko)
FR (1) FR1178396A (ko)
GB (1) GB852354A (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904866A (en) * 1958-06-30 1962-08-29 Dowty Mining Equipment Ltd Improvements in hydraulic props
DE1082212B (de) * 1958-12-31 1960-05-25 Bwg Bergwerk Walzwerk Be- und Entlueftungsventil fuer hydraulische Grubenstempel
DE1231648B (de) * 1960-08-11 1967-01-05 Bochumer Eisen Heintzmann Hydraulisches Ausbauelement, insbesondere fuer den untertaegigen Grubenbetrieb
NL277490A (ko) * 1961-04-20
CN110748366A (zh) * 2019-10-20 2020-02-04 山西晋城无烟煤矿业集团有限责任公司 一种液压阀阀芯磁力安装机构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR354739A (fr) * 1905-05-25 1905-10-11 Albert Cordebart Appareil pour le gonflement des bandages pneumatiques
US1026471A (en) * 1910-06-13 1912-05-14 George R Siefken Ventilator.
US2247568A (en) * 1938-05-13 1941-07-01 Proportioneers Inc Injection nozzle
GB538377A (en) * 1940-01-30 1941-07-31 Du Pont Manufacture of dyestuffs of the anthraquinone series
US2502158A (en) * 1946-09-27 1950-03-28 Kuskey Rude Backup trap
BE494572A (ko) * 1949-12-08
BE511527A (ko) * 1951-05-21

Also Published As

Publication number Publication date
US2912211A (en) 1959-11-10
FR1178396A (fr) 1959-05-06
DE1024040B (de) 1958-02-13
BE559110A (ko)

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