Patent ID: 8974207
Filing Date: 2015-03-10
Classification: F04C

Abstract:
1. A gear pump ( 1 ) for delivering a fluid, the gear pump ( 1 ) having an externally toothed gearwheel ( 3 ), which is rotatably mounted on a bearing pin ( 4 ), and an internally toothed annular gear ( 2 ) which engages with the gearwheel ( 3 ) in a meshing manner for the purpose of generating a delivery effect, wherein the gearwheel ( 3 ) and the annular gear ( 2 ) 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 an annular magnet ( 6 ) for the purpose of generating an electromotive force, with the annular magnet ( 6 ) being distinct and separate from the annular gear ( 2 ) and together with the annular gear ( 2 ) executing a rotary movement for the purpose of generating the delivery effect, wherein the annular gear ( 2 ) is mounted by an annular section ( 11 ) formed at least on a first surface ( 15 ) in the form of a sliding bearing ( 25 ), which is opposite the annular gear ( 2 ), the sliding bearing ( 25 ) positioned at least partially between the annular gear ( 2 ) and the annular magnet ( 6 ) in a radial direction.