(19)
(11) EP 1 099 833 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.09.2004 Bulletin 2004/40

(43) Date of publication A2:
16.05.2001 Bulletin 2001/20

(21) Application number: 00123658.7

(22) Date of filing: 30.10.2000
(51) International Patent Classification (IPC)7: F01N 3/28, F01N 7/08
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 09.11.1999 JP 31864099

(71) Applicant: Cataler Corporation
Ogasa-gun, Shizuoka-ken, 137-1492 (JP)

(72) Inventors:
  • Sato, Masayusu
    Ogasa-gun, Shizuoka-ken (JP)
  • Ozawa, Teruhiko
    Ogasa-gun, Shizuoka-ken (JP)

(74) Representative: Leson, Thomas Johannes Alois, Dipl.-Ing. et al
Patentanwälte Tiedtke-Bühling-Kinne & Partner, Bavariaring 4
80336 München
80336 München (DE)

   


(54) Pipe-shaped catalyst construction for exhaust gas purification


(57) The present invention intends to provide a pipe-shaped catalyst construction 10 which has high catalyst ability and which is excellent in high temperature resisting character, in a pipe-shaped catalyst construction. It is comprised of a pipe-shaped supporting body including a metallic pipe 11 and a cylindrical metallic foil 12 contained therein and provided with plural concaved portions 13 formed circumferentially, and a catalyst material 19 supported on the metallic foil.
In such catalyst construction, the metallic foil 12 is disposed along an inner peripheral surface of the pipe 11 except for a central portion of the metallic pipe in section. Also, rate of a central sectional area portion where the metallic foil 2 is not disposed to a whole sectional area of the pipe 11 defined by the inner peripheral surface of the pipe is selected to be 20 % to 60 %.






Search report