Patent ID: 8348637

Claim:
A gear pump ( 1 ) comprising: a pump housing ( 2 ) in which at least two meshed toothed wheels ( 3 ) are housed, with parallel axes of rotation (A), which delimit a suction chamber (B), on one side of a meshing zone, and a discharge chamber (C), on the other side of the meshing zone, the housing comprising at least one fluid inlet port ( 4 ) connected to at least one fluid supply circuit and linked with the suction chamber (B), and at least two fluid outlet ports ( 5 , 6 ) connected to at least two fluid utilization circuits, the at least two outlet ports being linked with the discharge chamber (C), via an integrated means of commutation ( 7 ) arranged so as to alternately distribute the fluid to the utilization circuits according to a predetermined commutation cycle, each of the toothed wheels ( 3 ) comprising a buffer channel ( 30 , 40 ), the buffer channels ( 30 , 40 ) being arranged so as to alternately link the means of commutation ( 7 ) with the discharge chamber (C) and the outlet ports ( 5 , 6 ) during rotation of the toothed wheels ( 3 ), each buffer channel ( 30 , 40 ) comprising an upstream point ( 31 , 41 ) and a downstream point ( 34 , 44 ), wherein the means of commutation ( 7 ) comprise a support plate ( 70 ) mounted to the housing for the toothed wheels ( 3 ), the support plate ( 70 ) comprises at least two distribution circuits ( 50 , 60 ) and each of the at least two distribution circuits ( 50 , 60 ) comprises an upstream channel ( 51 , 61 ) arranged so as to couple the discharge chamber (C) with the upstream point ( 31 , 41 ) of a corresponding one of the buffer channels ( 30 , 40 ) and a downstream channel ( 54 , 64 ) arranged so as to couple the downstream point ( 34 , 44 ) of the corresponding buffer channel with a corresponding one of the outlet ports ( 5 , 6 ) when the inlet of the downstream channel ( 54 , 64 ) is located opposite the buffer channel ( 30 , 40 ).