Process and apparatus for high pressure gas quenching in an atmospheric furnace - Patent 1211329

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(11)

EP 1 211 329 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	02.01.2004 Bulletin 2004/01

(43)	Date of publication A2:
	05.06.2002 Bulletin 2002/23

(21)	Application number: 01128749.7

(22)	Date of filing: 03.12.2001

(51)	International Patent Classification (IPC)⁷: C21D 1/613, C21D 1/76, C21D 1/74

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

04.12.2000 US 727473

(71)	Applicant: PRAXAIR TECHNOLOGY, INC.
	Danbury, CT 06810-5113 (US)

(72)	Inventors:
	Van den Sype, Jaak Katonah, New York 10536 (US) Jaynes, Scot Eric Lockport, New York 14094 (US)

(74)	Representative: Schwan - Schwan - Schorer
	Patentanwälte Bauerstrasse 22 80796 München 80796 München (DE)

(54)	Process and apparatus for high pressure gas quenching in an atmospheric furnace

(57) Apparatus and process for recycling a quenching gas, such as helium, to be used with a treating gas, such as a carburizing gas, for the treating of components in an atmospheric furnace.