US Patent 7481573 Mixing impeller with pre-shaped tip elements

Patent 7481573 was granted and assigned to SPX Corporation on January, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

SPX Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

74815730

Date of Patent

January 27, 2009

Patent Application Number

111698820

Date Filed

June 30, 2005

Patent Primary Examiner

‌

Charles E. Cooley

Patent abstract

A blade is disclosed for use in a mixing impeller assembly. The blade includes a top skin element and a bottom skin element without an internal framework in between the elements. A unitary pre-shaped tip element is attached at an end of the blade to the top and bottom skin elements. The tip is welded to the top skin and the bottom skin, and has a bevel at the weld location. The top skin has an edge that abuts the tip and the lower skin has an edge that abuts the tip, and respective bevels are provided on these edges.