Patent ID: 6857860
Filing Date: 2005-02-22
Classification: F04C

Abstract:
1. A gear metering pump comprising a pump body with a chamber comprising at least two intersecting cylindrical lobes, a first lobe receiving a driving gear and at least one other lobe receiving a driven gear, said gears being supported solely by their outer periphery leaning against an inner peripheral surface of each lobe, the driving gear being rotated by a drive shaft, an end of which is introduced into an axial recess of said driving gear, while the shape of said end of the shaft cooperates with the shape of said axial recess so as to furnish a drive torque to said driving gear while the drive shaft constitutes no means of radial or axial support or guidance at all between it and the driving gear, a packing seal mounted on the drive shaft, said packing seal being positioned on a surface of a front plate of the pump body that is turned toward the driving gear, in the immediate vicinity of the end of said shaft.