A ONE-PIECE DRILL BIT FOR SINGLE-PASS ANCHOR BOLTING AND SINGLE PASS DRILLING APPARATUS - Patent 1926882

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EP 1 926 882 A1

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(43)	Date of publication:
	04.06.2008 Bulletin 2008/23

(21)	Application number: 06747961.8

(22)	Date of filing: 26.06.2006

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International Patent Classification (IPC):

E21B 10/40^(2006.01)

(86)	International application number:
	PCT/SE2006/000778

(87)	International publication number:
	WO 2007/030047 (15.03.2007 Gazette 2007/11)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

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Priority:

05.09.2005 SE 0501979

(71)	Applicant: Sandvik Intellectual Property AB
	811 81 Sandviken (SE)

(72)	Inventors:
	LUNDBERG, Christer S-811 38 Sandviken (SE) HELIN, Aimo FI-33340 Tampere (FI) RAVAT, Pierre F-01360 Loyettes (FR)

(74)	Representative: Forsberg, Lars-Ake
	Sandvik Aktiebolag Patents and Licences Fack S-811 81 Sandviken S-811 81 Sandviken (SE)

(54)	A ONE-PIECE DRILL BIT FOR SINGLE-PASS ANCHOR BOLTING AND SINGLE PASS DRILLING APPARATUS