Patent ID: 6887055

Claim:
Positive-displacement rotary pump comprising a pair of meshing gears defining a driving gear and a driven gear, which are contained in a shell having an output opening and an intake opening for a fluid, the gears having shafts which are supported by bushings having two faces subjected, to pressures which bring about an axial load (Sâ€², Sâ€³) on the bushing itself, the resultant of the axial loads (Sâ€², Sâ€³) on the two bushings having a predetermined direction so as to move the bushings and the gears as a whole into close abutment with a predetermined reference plane, said gears having meshing helical teeth, and a system for compensating for the loads including axial load means which act on the same end of each shaft of the gears, the axial load means causing, an axial load (Sâ€³â€²) on the gears which prevails over the axial forces produced by the meshing and having the same direction as the resultant of the axial loads (Sâ€², Sâ€³) on the bushings.