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EP0201724A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Replaceable conveying spiral for a drill bit

Assignee: Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
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Filing: 1986-04-09
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Granted: —
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Expires: 2006-04-09
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Abstract

Abstract Translated from German Es wird eine Austausch-Förderwendel vorgeschlagen, die für Gesteinsbohrer zur Förderung von Bohrklein dient. Zur Herstellung einer kostengünstigen Austauschwendel wird ein T-Profilstahl verwendet, dessen wendelförmig aufgewickelter Quersteg das Mantelrohr (13) und dessen senkrechter Steg die Transportschulter (15) bildet. An exchange helix is proposed, which is used for rock drills to convey cuttings. A T-section steel is used to produce an inexpensive replacement helix, the helically wound cross bar of which forms the casing tube (13) and the vertical bar of which forms the transport shoulder (15).

Inventors

  • 👤 Norbert Dipl.-Ing. Müller
  • 👤 Bernhard Moser

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 10:49
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/26; E; E21; E21B; E21B17/00; E21B17/22

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