Patent ID: 6764283
Filing Date: 2004-07-20
Classification: F04C

Abstract:
An internal gear pump for pumping fuel from a suction conduit (18) into a pressure conduit (19), comprising:a pump housing (1) wherein an internal ring gear (5) and an eternally toothed pinion (3) are supported in said pump housing, wherein the externally toothed pinion is driven by a drive shaft (2), the pinion (3) being disposed eccentrically to the ring gear (5) and cooperating with the ring gear (5) to generate a pumping action, wherein the pinion (3) and the ring gear (5) rest with a first face end on the pump housing (1) and with a second face end on a sealing plate (13), wherein the suction conduit (18) is disposed in the sealing plate (13), wherein the sealing plate (13) is movable relative to the pump housing (1) in such a way that a spacing between the suction conduit (18) and the pressure conduit (19) can be varied, wherein the suction conduit (18) is formed by an elongated recess in a circumferential direction of the sealing plate (13), wherein the sealing plate (13) is rotatably relative to the rump housing (1) between two points, wherein the sealing plate (13) is prestressed in the axial direction with the aid of a spring (14), wherein said spring is coupled to the pump housing (1) and to the sealing plate (13), and wherein the spring (14) is prestressed in a circumferential direction counter to the driving direction of the internal pear pump.