Patent ID: 8038422

Claim:
Gear pump, comprising a housing ( 9 ) with at least two intermeshing gears ( 1 ) each with a shaft ( 8 ) supported by slide bearings (I) lubricated with pumping medium, the pumping medium (M) getting from a suction side ( 2 ) to a pressure side ( 3 ) and a return duct ( 4 ) being provided, which leads pumping medium (M) flowing to the outside via the slide bearing (I) back to the suction side ( 2 ), and with a valve ( 5 ), which includes a movable part and a stationary part ( 20 , 21 ), for the adjustment of a pressure difference (Δp) in function of an adjustment path (x), which indicates a position between the stationary part and the movable part ( 20 , 21 ), wherein the valve ( 5 ) has an adjustment range (EB 200 ), in which the pressure difference (Δp) in function of the adjustment path (x) has a slope between 0.05 and 2.5 bar per percentage of a maximum adjustment path (x max ), and wherein the adjustment range (EB 200 ) is at least 50% of the maximum adjustment path (x max ).