Patent ID: 9163626
Filing Date: 2015-10-20
Classification: F04C

Abstract:
1. A gear pump ( 1 ) for delivering a fluid, the gear pump ( 1 ) having a rotatably mounted externally toothed gearwheel ( 3 ) and an internally toothed annular gear ( 2 ) which engage in a meshing manner for the purpose of generating a delivery effect and which are arranged in a housing ( 5 ) together with an electrically commutatable stator ( 7 ), with the stator ( 7 ) extending around the annular gear ( 2 ) in a concentric manner and interacting with the annular gear for the purpose of generating an electromotive force, characterized in that the annular gear ( 2 ) has a closed, homogeneous cylindrical surface and a sliding bearing ( 13 ) is provided on the stator ( 7 ), the bearing ( 13 ) including a projection ( 15 ) that extends radially outward from the sliding bearing and that bears axially against an inner wall ( 14 ) of the housing ( 5 ) with a prestress, and wherein the sliding bearing ( 13 ) is formed on the stator ( 7 ) as a layer which is applied to a surface ( 12 ) of the stator ( 7 ), the surface ( 12 ) being opposite the annular gear ( 2 ), and wherein the sliding bearing ( 13 ) includes a portion that extends axially along a radially inner surface of the stator ( 7 ).