......DE..ESFRGB..................................R0512514EUROPEAN PATENT APPLICATIONA319930707EP92107651.919920506itenenBO91085 U19910507IT19930707199327199211111992465 5F 04C 15/00 A 5F 04C 2/08 BdeZahnradmaschineenGear machinefrMachine à engrenages2SAUER-SUNDSTRAND S.p.A.01152650Case 1920/92Via Villanova, 28I-40055 Villanova di CastenasoITZanardi, AngeloVia Bayron, 2I-40128 CorticellaITMei, DanieleVia Parma, 5I-40100 BolognaITRossi, FaustoVia Emilia Levante, 1054I-40024 Castel S. Pietro TermeITJorio, Paoloet al00044842Studio Torta, Via Viotti, 9I-10121 TorinoITDEESFRGB19930707199327

A machine (1) comprising two meshing gears (5, 6); two bushes (13) supporting the gear hubs (7, 8); a machine body (2) housing the gears (5, 6) and bushes (13); and two cover plates (3, 4) for the machine body (2). Each plate (3, 4) presents a seat (26) for a seal (25) formed in one piece and comprising a first annular element (27), and a second annular element (28) inwards of and joined over a long portion to the first annular element (27) by a thin wall (34) defining two channels (35, 36) for high-pressure fluid. The seal (25) defines two gaps, one for low-pressure fluid, defined by the second element (28), and the other for high-pressure fluid, defined by both elements (27, 28).