The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2007
Filed:
Aug. 09, 2004
Peter R Beckford, Derby, GB;
Peter R Beckford, Derby, GB;
Rolls-Royce plc, London, GB;
Abstract
Two metal blocks () are welded to respective metal sheets () to form sealed assemblies. The sealed assemblies are then diffusion bonded together to form two metal preforms (). The thick ends () and () of the metal sheets () and the metal blocks () are hot formed so that a continuation of the plane X of the first surfaces () of the metal sheets () extends through and across the metal blocks (). The metal preforms () are machined to remove the portion of the metal blocks () extending above the first surfaces () of the metal sheets () respectively. The metal preforms () and a metal sheet () are assembled into a stack (). The metal preforms () and the metal sheet () are diffusion bonded together and then superplastically formed to produce a hollow fan blade (). The method enables thinner metal workpieces with better microstructure to be used and increases the yield of metal workpieces.