EP 0324150 A1 19890719 - Drilling tool.
Title (en)
Drilling tool.
Title (de)
Bohrwerkzeug.
Title (fr)
Outil de forage.
Publication
Application
Priority
DE 3800611 A 19880112
Abstract (en)
A drill bit for drilling holes in concrete or masonry has a cutting head formed integrally with the shank (2). To remove the fragments of concrete or masonry from the hole the drill bit shank is fitted with spiral ribs (4). These spiral ribs may be of metal or plastics and are formed integrally with a housing which fits over the shank. This housing is supported at the end nearer to the drill bit head by a bush (6). The bore of this bush is shaped to match the contour of the drill bit shank whilst its outside diameter is a close fit in the end of the housing. The bush is made of elastic material and damps out any movement of the housing relative to the shank.
Abstract (de)
Es wird ein Bohrwerkzeug, vorzugsweise zur Herstellung von Durchbrüchen in Beton oder Mauerwerk, mit einer austauschbaren Förderwendel vorgeschlagen, bei welcher der Verschleiß an der Förderwendel (4) im Übergangsbereich zum Bohrerkopf (3) dadurch vermindert wird, daß elastische Abstützelemente (5) in Form von Gummi-Bolzen o. dgl. oder einer Federabstützung vorgesehen sind (hierzu Zeichnung).
IPC 1-7
IPC 8 full level
E21B 10/40 (2006.01); E21B 10/44 (2006.01); E21B 17/07 (2006.01); E21B 17/22 (2006.01)
CPC (source: EP)
E21B 10/40 (2013.01); E21B 10/445 (2013.01); E21B 17/073 (2013.01); E21B 17/22 (2013.01)
Citation (search report)
- [X] GB 2088437 A 19820609 - HILTI AG
- [APD] EP 0264657 A1 19880427 - HAWERA PROBST KG HARTMETALL [DE]
- [A] EP 0201723 A2 19861120 - HAWERA PROBST KG HARTMETALL [DE]
- [AD] DE 2543578 A1 19770407 - DUSS MASCHF
- [A] DE 269356 C
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0324150 A1 19890719; EP 0324150 B1 19921209; DE 3800611 A1 19890720; DE 3876612 D1 19930121
DOCDB simple family (application)
EP 88121544 A 19881223; DE 3800611 A 19880112; DE 3876612 T 19881223