METHOD AND DEVICE IN DOWN-THE-HOLE DRILLING - Patent 1127477

(19)

(11)

EP 1 127 477 A1

(12)

(43)	Date of publication:
	29.08.2001 Bulletin 2001/35

(21)	Application number: 99956719.1

(22)	Date of filing: 28.10.1999

(51)	International Patent Classification (IPC)⁷: H05B 1/00

(86)	International application number:
	PCT/US9925/220

(87)	International publication number:
	WO 0026/576 (11.05.2000 Gazette 2000/19)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30)

Priority:

04.11.1998 FI 982386

(71)	Applicant: NUMA TOOL COMPANY
	Thompson, CT 06277 (US)

(72)	Inventor:
	VALISALO, Juhani FIN-39501 Ikaalinen (FI)

(74)	Representative: Sparing - Röhl - HenselerPatentanwälte
	Postfach 14 04 43 40074 Düsseldorf 40074 Düsseldorf (DE)

(54)	METHOD AND DEVICE IN DOWN-THE-HOLE DRILLING