Patent ID: 6840260
Filing Date: 2005-01-11
Classification: B22D,B29C,B29L,F02D,F05C,F16K,Y10T

Abstract:
1. A method of making a throttle valve connection piece housing, said housing comprising a throughflow opening in which a throttle valve is pivotably mounted on a pivot axis, said pivot axis running substantially transverse to a center line of said opening, comprising the steps of: aligning facing surfaces of a first and second circular core, said first and second core defining substantially conical shaped bodies having a pinnacle point and a widening body in a direct circuit away from said point, said widening body defining a semicircle along one wall and at least said facing surface opposite said semicircle along another wall; mating said first and second core to form a continuous core such that a plane formed by said mated facing surfaces runs through said center line at a substantial right angle and through said pivot axis; placing said continuous core in an external mold, encapsulating said continuous core with an encapsulant; and axially separating said first and second core thereby producing an opening within said encapsulant, said opening comprising an inflow region running into a valve starting region running into an outflow region.