Patent ID: 7302993
Filing Date: 2007-12-04
Classification: B22C,B22D,Y10T

Abstract:
1. A method of forming a cast portion of a medical device, comprising: injecting molten metal into a fluid-entry end of a sprue of a casting mold, the sprue being in fluid communication with at least one side runner; impacting at least a portion of the molten metal against a closed end of the sprue, the closed end of the sprue positioned away from at least one side runner; and backfilling the at least one side runner with molten metal to form at least one cast object, wherein a connection between the sprue and a closed-end side runner is positioned a distance of at least about two sprue cross-sectional lengths from the closed end of the sprue, the closed-end side runner being a side runner located closest to the closed end of the sprue.