EP0322554A1
Expired / Lapsed
EP
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Rock drill bit
Assignee: Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
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Filing: 1988-11-21
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Granted: —
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Expires: 2008-11-21
Abstract
Abstract A rock drill bit for rotary and percussive loading is proposed which has equally good or improved drilling-dust conveying properties with a smaller conveying-groove cross-section. In order to achieve this, a main conveying groove (5, 18) with longitudinal profiles (6, 7 or 16, 17) is formed, with an interrupted secondary conveying groove (8, 20) which is integrated in the main conveying groove and whose conveying ribs (9, 21) have a larger helix angle than the helix angle of the main conveying groove (drawing hereto). <IMAGE>
Inventors
- 👤 Wolfgang Dipl.-Ing. Peetz
- 👤 Bernhard Moser
- 👤 Hermann Hugger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; E21B10/44; E21B10/445; E21B10/56
Claims Analysis
Total Claims: 0
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