Global Patent Index - EP 0829554 B2

EP 0829554 B2 20040512 - Low pressure carburising device with a plurality of sequentially arranged chambers

Title (en)

Low pressure carburising device with a plurality of sequentially arranged chambers

Title (de)

Niederdruck-Aufkohlungsanlage mit mehreren hintereinander angeordneten Kammern

Title (fr)

Installation pour la cémentation à basse pression avec des compartiments disposés les unes après les autres

Publication

EP 0829554 B2 20040512 (DE)

Application

EP 97890166 A 19970819

Priority

AT 163596 A 19960916

Abstract (en)

[origin: EP0829554A1] The apparatus for low-pressure carburisation of batches of workpieces comprises a means for transporting them through its various chambers. The transport means take the form of a roller conveyor (22). Batches (4) of workpieces pass successively through a vacuum-tight entry chamber (6), a vacuumisable heating chamber (7) with a nitrogen atmosphere under a pressure of 1-2 bar, at least one carburisation chamber (10, 11) with carburisation gas under a pressure preferably of 10-30 mbar, at least one diffusion chamber (13, 14), and finally a quenching chamber (17) for high-pressure gas quenching.

IPC 1-7

C23C 8/20; C23C 8/22; C21D 1/773

IPC 8 full level

C21D 1/773 (2006.01); C23C 8/20 (2006.01); C23C 8/22 (2006.01)

CPC (source: EP)

C21D 1/773 (2013.01); C23C 8/20 (2013.01); C23C 8/22 (2013.01)

Citation (opposition)

Opponent :

  • JP H055852 U 19930126
  • Firmendruckschrift "The Solution" 1/96
  • Datenblatt No. 771 der Fa. C. I. Hayes Inc.
  • Datenblatt No. 821 der Fa. C. I. Hayes Inc.
  • Industrial Heating, Juni 1985, D. H. Herring: "Why Vacuum Carburizing is Effective for Today and Tomorrow: I", Seiten 16, 17, 19
  • Metallurgia, Mai 1986, D.H. Herring et al.: "Vacuum Carburizing Developments", Seiten 169, 171, 172
  • HTM, Band 34, Nr. 2, 1979, F. W. Eysell et al.: "Entwicklungstendenzen auf dem Gebiet der Unterdruckaufkohlung", Seiten 83-90
  • Verkaufs- und Lieferbedingungen der IPSEN INTERNATIONAL GMBH KLEVE
  • Angebot Fa. Ipsen EN-05.3647.A vom 12.12.1995
  • Besuchsbericht (bzgl. Fa. Bosch) vom 13./14.12.1995
  • Angebot Fa. Ipsen EN-05.3647.B vom 15.08.1996
  • Rechnung "Rechn./Lieferschein Nr. 16730096", 10.10.1998
  • Telefax der ALD Vacuum Technologies GmbH, Erlensee (DE) an Herrn Berger, 07.10.1996
  • B. Edenhofer: "Carburizing and Nitriding Industry in the Eastern Hemisphere", Proceedings of the Second International Conference on Carburizing and Nitriding with Atmospheres, 06.-12.12.1995, Cleveland (US), Seiten 3-8
  • Besprechungsbericht (bzgl. Fa. Bosch) vom 07.03.1996

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0829554 A1 19980318; EP 0829554 B1 20000426; EP 0829554 B2 20040512; AT 404029 B 19980727; AT A163596 A 19971215; DE 59701501 D1 20000531

DOCDB simple family (application)

EP 97890166 A 19970819; AT 163596 A 19960916; DE 59701501 T 19970819