FR940432A - Perfectionnements aux étançons en usage dans les mines - Google Patents

Perfectionnements aux étançons en usage dans les mines

Info

Publication number
FR940432A
FR940432A FR940432DA FR940432A FR 940432 A FR940432 A FR 940432A FR 940432D A FR940432D A FR 940432DA FR 940432 A FR940432 A FR 940432A
Authority
FR
France
Prior art keywords
mines
props
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
Other languages
English (en)
French (fr)
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.)
Mavor and Coulson Ltd
Original Assignee
Mavor and Coulson 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
Application filed by Mavor and Coulson Ltd filed Critical Mavor and Coulson Ltd
Application granted granted Critical
Publication of FR940432A publication Critical patent/FR940432A/fr
Expired legal-status Critical Current

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)
FR940432D 1944-12-16 1947-02-10 Perfectionnements aux étançons en usage dans les mines Expired FR940432A (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
FR940432A true FR940432A (fr) 1948-12-13

Family

ID=10225137

Family Applications (1)

Application Number Title Priority Date Filing Date
FR940432D Expired FR940432A (fr) 1944-12-16 1947-02-10 Perfectionnements aux étançons en usage dans les mines

Country Status (4)

Country Link
BE (1) BE471022A (en, 2012)
FR (1) FR940432A (en, 2012)
GB (1) GB584220A (en, 2012)
NL (1) NL66234C (en, 2012)

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 (en, 2012) * 1969-04-02 1971-01-15 Devars Naudo Et Cie

Also Published As

Publication number Publication date
GB584220A (en) 1947-01-09
NL66234C (en, 2012)
BE471022A (en, 2012)

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