(19)
(11) EP 1 936 196 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.08.2008 Bulletin 2008/33

(43) Date of publication A2:
25.06.2008 Bulletin 2008/26

(21) Application number: 07024243.3

(22) Date of filing: 13.12.2007
(51) International Patent Classification (IPC): 
F04C 18/02(2006.01)
 F04C 27/00(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 MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 15.12.2006 JP 2006338311

(71) Applicant: Sanden Corporation
Isesaki-shi, Gunma 372-8502 (JP)

(72) Inventors:
  • Kobayashi, Noriyuki
    Isesaki-shi, Gunma 372-8502 (JP)
  • Higashiyama, Akiyoshi
    Isesaki-shi, Gunma 372-8502 (JP)

(74) Representative: Feldmeier, Jürgen et al
Prüfer & Partner GbR Patentanwälte Sohnckestrasse 12
81479 München
81479 München (DE)

   


(54) Fluid machine


(57) There is provided a seal ring (62) that is supported by a frame (18) concentrically with the axis of a rotary shaft (16), has an abutment joint (70) formed when opposite circumferential end surfaces (62c and 62d) contact each other due to circumferential elongation of the ring which is caused by thermal expansion, and slidingly contacts the back surface (50) of a movable scroll (34) to separate an oil passage (52). The seal ring has depressurizing means that depressurizes a high-pressure chamber (72) and creates an intermediate-pressure chamber (76) of lower pressure than the high-pressure chamber and of higher pressure than a low-pressure chamber (42). The depressurizing means is formed in the abutment joint.







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