BE507997A - - Google Patents

Info

Publication number
BE507997A
BE507997A BE507997DA BE507997A BE 507997 A BE507997 A BE 507997A BE 507997D A BE507997D A BE 507997DA BE 507997 A BE507997 A BE 507997A
Authority
BE
Belgium
Application number
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.)
Publication of BE507997A publication Critical patent/BE507997A/xx
Priority to DE747251X priority Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50Component parts or details of props
    • E21D15/51Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/515Particular fluids not covered by any chemical subdivision
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/28Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/30Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
    • E21D15/306Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber by means of a liquid
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/44Hydraulic, pneumatic, or hydraulic-pneumatic props
BE507997D 1951-01-09 BE507997A (xx)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE747251X 1951-01-09

Publications (1)

Publication Number Publication Date
BE507997A true BE507997A (xx)

Family

ID=6648590

Family Applications (1)

Application Number Title Priority Date Filing Date
BE507997D BE507997A (xx) 1951-01-09

Country Status (4)

Country Link
BE (1) BE507997A (xx)
FR (1) FR1060827A (xx)
GB (1) GB747251A (xx)
NL (1) NL166402B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928643A (en) * 1953-02-21 1960-03-15 Bellmann Eugen Prop-type supporting device
US2938699A (en) * 1953-01-15 1960-05-31 Bellmann Emma Elfriede Prop-type supporting devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938699A (en) * 1953-01-15 1960-05-31 Bellmann Emma Elfriede Prop-type supporting devices
US2928643A (en) * 1953-02-21 1960-03-15 Bellmann Eugen Prop-type supporting device

Also Published As

Publication number Publication date
GB747251A (en) 1956-03-28
NL166402B (nl)
FR1060827A (fr) 1954-04-06

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