DE330446C - - Google Patents

Info

Publication number
DE330446C
DE330446C DENDAT330446D DE330446DA DE330446C DE 330446 C DE330446 C DE 330446C DE NDAT330446 D DENDAT330446 D DE NDAT330446D DE 330446D A DE330446D A DE 330446DA DE 330446 C DE330446 C DE 330446C
Authority
DE
Germany
Prior art keywords
iron
wedge
punch
pit
web
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.)
Active
Application number
DENDAT330446D
Other languages
German (de)
English (en)
Publication of DE330446C publication Critical patent/DE330446C/de
Active 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
    • E21D15/36—Telescopic props with parts held relatively to each other by friction or gripping by a tiltable collar surrounding one or both parts

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)
  • Press Drives And Press Lines (AREA)
DENDAT330446D Active DE330446C (enExample)

Publications (1)

Publication Number Publication Date
DE330446C true DE330446C (enExample)

Family

ID=571463

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT330446D Active DE330446C (enExample)

Country Status (1)

Country Link
DE (1) DE330446C (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5176866A (en) * 1989-02-28 1993-01-05 Asahi Kasei Kogyo Kabushiki Kaisha Process for producing a resin product having a bent hollow portion and a core usable for the same process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5176866A (en) * 1989-02-28 1993-01-05 Asahi Kasei Kogyo Kabushiki Kaisha Process for producing a resin product having a bent hollow portion and a core usable for the same process

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