Patent ID: 6122824
Filing Date: 2000-09-26
Classification: B23C,B23F,F01C,Y10T

Abstract:
A method of making a main rotor with at least one fluid conducting flute therein having opposing side flanks and a ruled surface root therebetween, where the ruled surface root comprises a plurality of straight line sealing segments, the main rotor being for use in a rotary fluid machine having a gate rotor cooperating therewith to force volumes of fluid therethrough, where the gate rotor has a plurality of teeth having straight line tips that form straight line sealing areas with the ruled surface root when the gate rotor is engaged with the main rotor, said method comprising the steps of:a. providing a starting unit composed of a material for said main rotor of a predetermined configuration,b. positioning the starting unit at a work area of a milling machine,c. operating the milling machine to:(1) make a first milling pass into the material of said starting unit to mill one side flank and one portion of the ruled surface root of a first flute extending into the material of the starting unit,(2) make a second milling pass into the material of said starting unit to mill the opposite side flank and another portion of the ruled surface root of said first flute thus completing the first flute.