(19)
(11) EP 1 291 526 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.11.2003 Bulletin 2003/46

(43) Date of publication A2:
12.03.2003 Bulletin 2003/11

(21) Application number: 02020146.3

(22) Date of filing: 09.09.2002
(51) International Patent Classification (IPC)7: F04C 2/18, F04C 15/00
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 07.09.2001 IT BO20010540

(71) Applicant: Morselli, Mario Antonio
41100 Modena (IT)

(72) Inventor:
  • Morselli, Mario Antonio
    41100 Modena (IT)

(74) Representative: Provvisionato, Paolo 
Provvisionato & Co S.r.l., Piazza di Porta Mascarella, 7
40126 Bologna
40126 Bologna (IT)

   


(54) Gear pump


(57) A positive-displacement rotary pump comprising a pair of meshing gears (13, 14) or rotors, consisting of a driving gear and a driven gear, contained in a shell (10) having an output opening and an intake opening for a fluid. The gears (13, 14) comprise shafts (23, 24) which are supported by bushings (15a, 15b) having two faces (17a, 17b) which are subjected, in use, to pressures which bring about an axial load on the bushing itself, characterized in that the resultant of the axial loads (S', S") on the two bushings has a predetermined direction so as to move the bushings (15a, 15b) and the gears (13, 14) as a whole into close abutment with a predetermined reference plane (VI-VI).






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