Patent ID: 6935851

Claim:
An external gear pump, comprising: a) a casing; b) a gear chamber formed in said casing, comprising an inlet for a fluid on a low pressure side and an outlet for the fluid on a high pressure side and comprising axial sealing stays and radial sealing stays; c) a first toothed wheel which is adapted to be rotated in the gear chamber, comprising an external toothing; d) a second toothed wheel which is adapted to be rotated in the gear chamber, comprising an external toothing which is in a toothed mesh with said external toothing of said first toothed wheel; e) wherein said external toothings form delivery cells in which the fluid is transported from said inlet to said outlet and which are axially sealed off by said axial sealing stays and radially sealed off by said radial sealing stays; f) and at least one pressure fluid supply through which pressure fluid is adapted to be supplied to said low pressure side; g) wherein said at least one pressure fluid supply opens on the low pressure side into a delivery cell which is radially sealed off by one of the radial sealing stays; h) and wherein a relieving space is formed which is connected to the low pressure side of the pump and opens into the same delivery cell of the external toothing as the pressure fluid supply and into which the pressure fluid expels the fluid of the low pressure side contained in the delivery cell.