Patent ID: 6527530
Filing Date: 2003-03-04
Classification: F04C

Abstract:
A geared pump, comprising a housing (18), two gear wheels (14, 16) disposed in the housing and meshing with one another, and at least one groove (22) that is embodied in the housing on the pressure side of the geared pump, said at least one groove having a first portion (24) extending from the pressure side where it originates with a slight spacing between the bottom of the groove (22) and the tips of the teeth (20) of the gear wheel, and a second portion (26), which adjoins said first portion and in which the bottom of the groove (22) has a maximum spacing from the tooth tips that is greater than the spacing in the first portion, said first portion extending over a smaller angular range (&agr;) than the second portion, and the first and second portions extending over a total angular range (&agr;, &bgr;) that is somewhat greater than angular spacing between two teeth (20).