BE471022A - - Google Patents

Info

Publication number
BE471022A
BE471022A BE471022DA BE471022A BE 471022 A BE471022 A BE 471022A BE 471022D A BE471022D A BE 471022DA BE 471022 A BE471022 A BE 471022A
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 BE471022A publication Critical patent/BE471022A/xx

Links

Classifications

    • 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
    • E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
    • E21D23/0008—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face comprising a pair of joined struts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
BE471022D 1944-12-16 BE471022A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25279/44A GB584220A (en) 1944-12-16 1944-12-16 Improvements in roof supports for use in mines

Publications (1)

Publication Number Publication Date
BE471022A true BE471022A (fr)

Family

ID=10225137

Family Applications (1)

Application Number Title Priority Date Filing Date
BE471022D BE471022A (fr) 1944-12-16

Country Status (4)

Country Link
BE (1) BE471022A (fr)
FR (1) FR940432A (fr)
GB (1) GB584220A (fr)
NL (1) NL66234C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2795934A (en) * 1952-09-30 1957-06-18 Joy Mfg Co Rotating hydraulic roof supporting jacks
FR2039523A5 (fr) * 1969-04-02 1971-01-15 Devars Naudo Et Cie

Also Published As

Publication number Publication date
GB584220A (en) 1947-01-09
NL66234C (fr)
FR940432A (fr) 1948-12-13

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