(19)
(11) EP 0 972 941 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.08.2001 Bulletin 2001/32

(43) Date of publication A2:
19.01.2000 Bulletin 2000/03

(21) Application number: 99113792.8

(22) Date of filing: 14.07.1999
(51) International Patent Classification (IPC)7: F04C 2/18, F04C 15/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 15.07.1998 IT MO980158

(71) Applicant: Oleodinamica G.M.M. S.R.L.
40064 Ozzano Emilia (Bologna) (IT)

(72) Inventors:
  • Gamberini, Alfredo
    40068 S. Lazzaro (Bologna) (IT)
  • Gamberini, Luigi
    40068 S. Lazzaro (Bologna) (IT)

(74) Representative: Luppi, Luigi 
Luppi & Crugnola S.r.l. Viale Corassori, 54
41100 Modena
41100 Modena (IT)

   


(54) Gear pump


(57) The gear hydraulic means (2) includes a housing (12, 20) containing a first and a second cogwheel (4, 6) engaging for interacting with a hydraulic fluid, each wheel (4, 6) being joint to a respective shaft (8, 10) having the ends rotationally supported to said housing (12, 20), and hydraulic sealing means (42, 60) firmly coupled to respective support means (34, 46, 58); a method for producing gear hydraulic means (2) is furthermore provided, including providing a housing (12, 20) suitable to house a first and a second cogwheel (4, 6) engaging for interacting with a hydraulic fluid, providing furthermore a shaft firmly coupled to each wheel and having the ends rotationally supported to said housing (12, 20), and firmly coupling hydraulic sealing means (42, 60) to respective support means (34, 46, 58).






Search report