(19)
(11) EP 1 672 222 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.04.2007 Bulletin 2007/14

(43) Date of publication A2:
21.06.2006 Bulletin 2006/25

(21) Application number: 05027844.9

(22) Date of filing: 19.12.2005
(51) International Patent Classification (IPC): 
F04D 23/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 17.12.2004 DE 202004019506 U

(71) Applicant: Gardner Denver Elmo Technology GmbH
97616 Bad Neustadt a.d. Saale (DE)

(72) Inventors:
  • Dittmar, Rudi
    98590 Helmers (DE)
  • Kempf, Mario
    97616 Bad Neustadt (DE)

(74) Representative: Rau, Albrecht et al
Patentanwälte Rau, Schneck & Hübner Königstrasse 2
90402 Nürnberg
90402 Nürnberg (DE)

   


(54) Lateral channel compressor


(57) In order to guarantee a high degree of efficiency, even with different speeds, a lateral channel (2, 2A, 2B) with an elliptical cross-sectional surface is provided, which tapers from an aspiration side through to a pressure side. Here, the elliptical cross-sectional geometry is formed by a supporting ring (18) of an impeller (12) and by an inside wall area (28) of a casing (6, 8). The supporting ring (18) and the inside wall area (28) enclose the lateral channel (2) almost fully, the elliptically curved wall areas passing homogeneously into each other.







Search report