(19)
(11) EP 2 042 735 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.08.2014 Bulletin 2014/35

(43) Date of publication A2:
01.04.2009 Bulletin 2009/14

(21) Application number: 08163285.3

(22) Date of filing: 29.08.2008
(51) International Patent Classification (IPC): 
F04C 2/10(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 27.09.2007 GB 0718903

(71) Applicant: Delphi International Operations Luxembourg S.à r.l.
4940 Bascharage (LU)

(72) Inventor:
  • McCrindle, Christopher
    West Malling, Kent ME19 4FJ (GB)

(74) Representative: Neill, Andrew Peter et al
Delphi Diesel Systems Patent Department Courteney Road
Gillingham, Kent ME8 0RU
Gillingham, Kent ME8 0RU (GB)

   


(54) Gerotor Pump


(57) A gerotor pump (56) comprises a rotor chamber having a longitudinally extending central axis, an outer rotor (70) rotatable in the rotor chamber with a radial clearance (78) between an outer periphery (80) of the outer rotor and the rotor chamber, an inner rotor (66) rotatable in the outer rotor and cooperably engageable therewith to define a plurality of pumping chambers (96) having respective volumes that vary when, in use, the inner rotor rotates relative to the outer rotor. The inner rotor (66) is rotatable about an axis of rotation spaced from the central axis and contained in a first plane that contains the central axis and the rotor chamber is configured such that the radial clearance (78) in at least one direction in the first plane is greater than at least one radial clearance (78) in a second plane that extends perpendicular to the first plane and contains the central axis.







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