GB1033380A - Improvements in or relating to hydraulic props - Google Patents

Improvements in or relating to hydraulic props

Info

Publication number
GB1033380A
GB1033380A GB3492362A GB3492362A GB1033380A GB 1033380 A GB1033380 A GB 1033380A GB 3492362 A GB3492362 A GB 3492362A GB 3492362 A GB3492362 A GB 3492362A GB 1033380 A GB1033380 A GB 1033380A
Authority
GB
United Kingdom
Prior art keywords
valve
cylinder
reservoir
passage
chamber
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
GB3492362A
Other languages
English (en)
Inventor
Thomas Gray
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.)
Dobson Ltd W E & F
WE&F Dobson Ltd
Original Assignee
Dobson Ltd W E & F
WE&F Dobson 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 to BE636240D priority Critical patent/BE636240A/xx
Application filed by Dobson Ltd W E & F, WE&F Dobson Ltd filed Critical Dobson Ltd W E & F
Priority to GB3492362A priority patent/GB1033380A/en
Priority to FR945283A priority patent/FR1366540A/fr
Publication of GB1033380A publication Critical patent/GB1033380A/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
    • E21D15/14—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

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)
GB3492362A 1962-09-13 1962-09-13 Improvements in or relating to hydraulic props Expired GB1033380A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE636240D BE636240A (en:Method) 1962-09-13
GB3492362A GB1033380A (en) 1962-09-13 1962-09-13 Improvements in or relating to hydraulic props
FR945283A FR1366540A (fr) 1962-09-13 1963-08-21 Perfectionnements aux étançons hydrauliques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3492362A GB1033380A (en) 1962-09-13 1962-09-13 Improvements in or relating to hydraulic props

Publications (1)

Publication Number Publication Date
GB1033380A true GB1033380A (en) 1966-06-22

Family

ID=10371604

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3492362A Expired GB1033380A (en) 1962-09-13 1962-09-13 Improvements in or relating to hydraulic props

Country Status (2)

Country Link
BE (1) BE636240A (en:Method)
GB (1) GB1033380A (en:Method)

Also Published As

Publication number Publication date
BE636240A (en:Method)

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