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DE223791C - - Google Patents

Info

Publication number
DE223791C
DE223791C DENDAT223791D DE223791DA DE223791C DE 223791 C DE223791 C DE 223791C DE NDAT223791 D DENDAT223791 D DE NDAT223791D DE 223791D A DE223791D A DE 223791DA DE 223791 C DE223791 C DE 223791C
Authority
DE
Germany
Prior art keywords
punch
wedge
cap
cavity
driven
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
DENDAT223791D
Other languages
German (de)
Publication of DE223791C publication Critical patent/DE223791C/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)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims (1)

Pa tent-Anspruch:Patent claim: Metallener Grubenstempel mit einer durch Keil antreibbaren Kappe, dadurch gekennzeichnet, daß der Stempelunterteil einen Hohlraum zur Aufnahme eines auswechselbaren hölzernen Einsatzstückes besitzt, dessen kegelförmige Spitze sich gegen den Stollenboden stützt.Metal pit punch with a cap that can be driven by a wedge, characterized in that that the lower part of the punch has a cavity for receiving a replaceable wooden insert, whose conical tip is supported against the tunnel floor.
DENDAT223791D Active DE223791C (en)

Publications (1)

Publication Number Publication Date
DE223791C true DE223791C (en)

Family

ID=484580

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT223791D Active DE223791C (en)

Country Status (1)

Country Link
DE (1) DE223791C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE828689C (en) * 1948-10-02 1952-01-21 Gelsenkirchener Bergwerks Akti Iron pit stamp with adjustable stamp head
DE926062C (en) * 1950-05-16 1955-04-04 Press Und Stanzwerk Golzheim Robbery shoe for stamp heads

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE828689C (en) * 1948-10-02 1952-01-21 Gelsenkirchener Bergwerks Akti Iron pit stamp with adjustable stamp head
DE926062C (en) * 1950-05-16 1955-04-04 Press Und Stanzwerk Golzheim Robbery shoe for stamp heads

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