Patent ID: 6679478
Filing Date: 2004-01-20
Classification: F01L

Abstract:
A hollow poppet valve comprising a hollow, flare-shaped fillet area which is integrally formed from a same metal at one end of a hollow, cylindrical stern portion, said fillet area having a fire contacting face, and an open edge portion terminating in an edge that opposes said fire contacting face;a cap forming an opposing face to said fire contacting face; a weld joint integrating an outer edge of said cap around the edge of the open edge portion of said fillet area such that said cap is supported solely by said fillet area and said weld joint without internal bracing; wherein the open edge portion of said fillet area has a wall thickness that is greater than a wall thickness of said stem portion, and said cap, and wherein a valve face having an HV of at least 300 is formed around said fire contacting face of said fillet area.