Patent ID: 6088916
Filing Date: 2000-07-18
Classification: F04C,F16K,Y10T

Abstract:
A method of fabricating a pump comprising the steps of:providing a fluid flow conduit in a pump housing between a pump suction chamber and a discharge chamber;providing a first counterbore coaxially about said conduit with a first inside diameter and a first axial depth from said suction chamber;providing a second counterbore coaxially about said conduit with a second inside diameter less than said first inside diameter and a second axial depth measured from an axial depth end of said first counterbore;providing a substantially cylindrical sleeve element having an annular wall between a sleeve inside diameter and a sleeve outside diameter, said sleeve having an axial length greater than said second axial depth and a sleeve outside diameter corresponding to said second counterbore inside diameter;securing said sleeve within said second counterbore to project an excess sleeve length coaxially within said first counterbore thereby providing an unrestricted annular space between said sleeve outside diameter and said first counterbore inside diameter; and,providing a valve seating surface on the projected axial end of said sleeve.