FR773629A - - Google Patents

Info

Publication number
FR773629A
FR773629A FR773629DA FR773629A FR 773629 A FR773629 A FR 773629A FR 773629D A FR773629D A FR 773629DA FR 773629 A FR773629 A FR 773629A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR773629A publication Critical patent/FR773629A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D1/00—Sinking shafts
    • E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
    • E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR773629D Expired FR773629A (US20100223739A1-20100909-C00025.png)

Publications (1)

Publication Number Publication Date
FR773629A true FR773629A (US20100223739A1-20100909-C00025.png) 1934-11-21

Family

ID=1552097

Family Applications (1)

Application Number Title Priority Date Filing Date
FR773629D Expired FR773629A (US20100223739A1-20100909-C00025.png)

Country Status (1)

Country Link
FR (1) FR773629A (US20100223739A1-20100909-C00025.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822147A (en) * 1953-06-15 1958-02-04 Allard Pierre Jean-Ma Theodore Guide device for boring tools

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822147A (en) * 1953-06-15 1958-02-04 Allard Pierre Jean-Ma Theodore Guide device for boring tools

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