EP 2188493 A1 20100526 - ROLLER DRILL OR ROLLER BIT
Title (en)
ROLLER DRILL OR ROLLER BIT
Title (de)
ROLLENBOHRWERKZEUG ODER ROLLENMEISSEL
Title (fr)
TRÉPAN À MOLETTES
Publication
Application
Priority
EP 2007008120 W 20070918
Abstract (en)
[origin: WO2009036781A1] The invention relates to a roller drill for removing material, especially rocks, minerals, or the like, according to the undercutting principle. Said roller drill comprises a cutting edge (12) that is concentric to a central axis M and conically widens towards the face (11) of the roller drill (10), and a supporting element (15) which is arranged on the internal face of the cutting edge (12) and extends to the face (11) of the tool. In order to design a roller drill or a roller bit, the down time of which is shorter or the useful life of which is longer than in prior art, the cutting edge (12) is made of a harder material than the supporting element (15), and the supporting element (15) forms an annular web (22) which is conical at least on an external circumferential wall (20) and delimits a free space (21) on the face (11) of the drill/bit by means of the internal circumferential wall (23) thereof. The drill/bit can be autonomously resharpened as a result of the free space and the different material combination.
IPC 8 full level
E21C 25/18 (2006.01)
CPC (source: EP US)
E21C 27/32 (2013.01 - EP US)
Citation (search report)
See references of WO 2009036781A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2009036781 A1 20090326; AT E497571 T1 20110215; AU 2007359121 A1 20090326; AU 2007359121 B2 20150507; CA 2699807 A1 20090326; CA 2699807 C 20121120; CN 101796263 A 20100804; CN 101796263 B 20130109; DE 502007006437 D1 20110317; EP 2188493 A1 20100526; EP 2188493 B1 20110202; ES 2363116 T3 20110720; JP 2010539353 A 20101216; JP 5709519 B2 20150430; PL 2188493 T3 20110630; US 2010219676 A1 20100902; US 8469458 B2 20130625; ZA 201002632 B 20101229
DOCDB simple family (application)
EP 2007008120 W 20070918; AT 07818222 T 20070918; AU 2007359121 A 20070918; CA 2699807 A 20070918; CN 200780100481 A 20070918; DE 502007006437 T 20070918; EP 07818222 A 20070918; ES 07818222 T 20070918; JP 2010524357 A 20070918; PL 07818222 T 20070918; US 67580210 A 20100419; ZA 201002632 A 20100415