EP 2188493 B1 20110202 - 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: US8469458B2] A roller drill for removing material, such as in particular rock, minerals or the like, according to the undercutting principle, comprising a cutting face which is formed concentrically around a central axis and widens conically toward an end face of the roller drill, and includes a supporting body which is arranged on the inner side of the cutting face and extends up to the end face of the tool. In order to provide a roller drill or a roller bit of which the tool life or service life is improved compared with the prior art, the cutting face is made of a harder material than the supporting body and the supporting body forms an annular web which is conical at least at an outer circumferential wall and which defines with its inner circumferential wall a free space at the end face of the tool. The tool can resharpen itself automatically due to the free space and the dissimilar material combination.
IPC 8 full level
E21C 25/18 (2006.01)
CPC (source: EP US)
E21C 27/32 (2013.01 - EP US)
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
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