(19)
(11) EP 2 317 144 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.12.2012 Bulletin 2012/52

(43) Date of publication A2:
04.05.2011 Bulletin 2011/18

(21) Application number: 10189404.6

(22) Date of filing: 29.10.2010
(51) International Patent Classification (IPC): 
F04C 2/14(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 30.10.2009 IT BO20090714

(71) Applicants:
  • Morselli, Mario Antonio
    41100 Modena (IT)
  • Settima Meccanica S.R.L.
    29020 Settima (Piacenza) (IT)

(72) Inventor:
  • Morselli, Mario Antonio
    41121 Modena (MO) (IT)

(74) Representative: Botti, Mario et al
Botti & Ferrari S.r.l. Via Cappellini, 11
20124 Milano
20124 Milano (IT)

   


(54) Gear for an hydraulic gear machine


(57) A hydraulic gear apparatus comprises a pair of gears which mesh with each other with semi-encapsulation. Each gear has a plurality of teeth having a profile which falls within a tolerance band of ± 1/15, more preferably ± 1/20, and even more preferably ± 1/30 with respect to the height of the tooth, with respect to a profile homothetic to a profile defined by a predetermined spline function passing through a plurality of node points having predetermined coordinates {X,Y} with their origin on the axis of rotation.







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