DE253974C - - Google Patents

Info

Publication number
DE253974C
DE253974C DENDAT253974D DE253974DA DE253974C DE 253974 C DE253974 C DE 253974C DE NDAT253974 D DENDAT253974 D DE NDAT253974D DE 253974D A DE253974D A DE 253974DA DE 253974 C DE253974 C DE 253974C
Authority
DE
Germany
Prior art keywords
plunger
marked
sheet
arrangement
pipe
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
DENDAT253974D
Other languages
German (de)
Publication of DE253974C publication Critical patent/DE253974C/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
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure

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)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

BERLIN. GEDRUCKT IN DER REICHSDRUCKEREI.BERLIN. PRINTED IN THE REICHSDRUCKEREI.

Claims (1)

Patent-Anspruch :Patent claim: Grubenstempel aus einem Rohr mit Füllmasse und Preßkolben, gekennzeichnet durch die Anordnung einer mit dem Preßkolben verbundenen Schraubenspindel.Pit punch made from a pipe with filling compound and plunger, marked by the arrangement of a screw spindle connected to the plunger. Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.
DENDAT253974D Active DE253974C (en)

Publications (1)

Publication Number Publication Date
DE253974C true DE253974C (en)

Family

ID=512205

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT253974D Active DE253974C (en)

Country Status (1)

Country Link
DE (1) DE253974C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322662A1 (en) * 1993-07-07 1995-01-12 Max Homeier Extractor hood arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322662A1 (en) * 1993-07-07 1995-01-12 Max Homeier Extractor hood arrangement

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