FR846894A - flexible mine prop - Google Patents

flexible mine prop

Info

Publication number
FR846894A
FR846894A FR846894DA FR846894A FR 846894 A FR846894 A FR 846894A FR 846894D A FR846894D A FR 846894DA FR 846894 A FR846894 A FR 846894A
Authority
FR
France
Prior art keywords
mine prop
flexible mine
flexible
prop
mine
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
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.)
Hermann Schwarz KG
Original Assignee
Hermann Schwarz KG
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 Hermann Schwarz KG filed Critical Hermann Schwarz KG
Application granted granted Critical
Publication of FR846894A publication Critical patent/FR846894A/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
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

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)
FR846894D 1938-09-20 1938-12-01 flexible mine prop Expired FR846894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE846894X 1938-09-20

Publications (1)

Publication Number Publication Date
FR846894A true FR846894A (en) 1939-09-27

Family

ID=6775175

Family Applications (1)

Application Number Title Priority Date Filing Date
FR846894D Expired FR846894A (en) 1938-09-20 1938-12-01 flexible mine prop

Country Status (1)

Country Link
FR (1) FR846894A (en)

Similar Documents

Publication Publication Date Title
FR868634A (en) iron mine prop
FR858624A (en) Mine cartridge
FR859065A (en) adjustable props
FR880347A (en) flexible mine shoring
FR49666E (en) flexible mine prop
FR846894A (en) flexible mine prop
FR849422A (en) metal prop
FR862449A (en) Advanced Air Mine
FR862325A (en) frost shield
FR843483A (en) Socque
FR850338A (en) Life-saving clothing-float
FR853786A (en) Mine collector
FR866925A (en) Drifting mine
FR850972A (en) Visor-heat shield
FI19188A (en) Gyroscope
FR850153A (en) Torpedo
FR849244A (en) Percussion rocket
FR860779A (en) Powerful explosives
FR833248A (en) Underwater mine
FI20050A (en) Skjutventil
FI19577A (en) Paketeringsmaskin
FI20533A (en) Disk- och tvättmaskin
FI20298A (en) Låsmutter
FI20268A (en) Brevkuvertöppnare
FI19384A (en) Kylapparat