HAIRPIN CONFIGURED TUBES AND METHOD OF MANUFACTURE - Patent 0175743

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EP 0 175 743 A1

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(43)	Date of publication:
	02.04.1986 Bulletin 1986/14

(21)	Application number: 85901607.0

(22)	Date of filing: 12.03.1985

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International Patent Classification (IPC):

F28F 1/ 00^{( . )}
B21D 7/ 00^{( . )}
F28F 1/ 02^{( . )}

B21C 37/ 28^{( . )}
F28D 7/ 06^{( . )}

(86)	International application number:
	PCT/NO1985/000015

(87)	International publication number:
	WO 1985/004242 (26.09.1985 Gazette 1985/21)

(84)	Designated Contracting States:
	AT BE CH DE FR GB LI LU NL SE

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Priority:

14.03.1984 US 19840589932

(71)	Applicant: NORSK HYDRO A/S
	N-0257 Oslo 2 (NO)

(72)	Inventors:
	KNOLL, Richard Cocoa Beach, FL 32931 (US) CLAUSEN, Edvin, List DK-6270 Tonder (DK)

(74)	Representative: Wilhelms, Rolf E., Dr., et al
	WILHELMS, KILIAN & PARTNER Patentanwälte Eduard-Schmid-Strasse 2 D-81541 München D-81541 München (DE)

(54)	HAIRPIN CONFIGURED TUBES AND METHOD OF MANUFACTURE