(19)
(11) EP 0 831 234 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.06.1999 Bulletin 1999/25

(43) Date of publication A2:
25.03.1998 Bulletin 1998/13

(21) Application number: 97402151.1

(22) Date of filing: 17.09.1997
(51) International Patent Classification (IPC)6: F04C 18/02
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV RO SI

(30) Priority: 20.09.1996 JP 285831/96

(71) Applicant: ASUKA JAPAN CO., LTD.
Kumage-gun, Yamaguchi, 742-15 (JP)

(72) Inventor:
  • Nakamura, Mitsuo
    Kumage-gun, Yamaguchi, 742-15 (JP)

(74) Representative: Bertrand, Didier et al
c/o S.A. FEDIT-LORIOT & AUTRES CONSEILS EN PROPRIETE INDUSTRIELLE 38, Avenue Hoche
75008 Paris
75008 Paris (FR)

   


(54) Scroll fluid machine


(57) A scroll fluid machine having an orbiting scroll positioned at the center in an axial direction of an eccentric shaft portion of a driving shaft for improving abnormal wear of tip-seals or fluid leakage at the tip-seals due to uncontrollability of clearances at the tips of spiral wraps caused by an unfixity of an orbiting scroll on a driving shaft on a conventional scroll fluid machine. Axially rigid bearings are engaged with the driving shaft at two places, one for a stationary scroll and the other for the orbiting scroll so as to prevent the stationary scroll and the orbiting scroll from moving on the driving shaft in the axial direction. Thus, a structure improving the above abnormal wear of the tip-seals or fluid leakage at the tip-seals by equalizing pressure on the tip-seals can be provided, thereby ensuring smoother orbital movement of the orbiting scroll.






Search report