FEED-EXTENSION CYLINDER ARRANGEMENT IN A FEED BEAM FOR A ROCK DRILL - Patent 0738367

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EP 0 738 367 A1

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(43)	Date of publication:
	23.10.1996 Bulletin 1996/43

(21)	Application number: 95905154.0

(22)	Date of filing: 03.01.1995

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International Patent Classification (IPC):

E21B 19/ 086^{( . )}

(86)	International application number:
	PCT/FI1995/000002

(87)	International publication number:
	WO 1995/018913 (13.07.1995 Gazette 1995/30)

(84)	Designated Contracting States:
	AT DE FR GB IT SE

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Priority:

05.01.1994 FI 19940000042

(71)	Applicant: TAMROCK OY
	SF-33310 Tampere (FI)

(72)	Inventors:
	JANTUNEN, Heikki FIN-33310 Tampere (FI) HÄKKINEN, Leo FIN-33610 Tampere (FI)

(74)	Representative: Dahlström, Karl Krister, et al
	Oy Kolster Ab, Iso Roobertinkatu 23, P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)

(54)	FEED-EXTENSION CYLINDER ARRANGEMENT IN A FEED BEAM FOR A ROCK DRILL