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:
Oct. 19, 1993
Filed:
Jan. 04, 1993
Applicant:
Inventors:
Primary Examiner:
Int. Cl.
CPC ...
B23D / ;
U.S. Cl.
CPC ...
2988972 ;
Abstract
A hollow blade for a turboshaft engine, such as a fan rotor blade of large chord, is manufactured by a method in which primary components including two outer metal sheets and at least one intermediate sheet are hot formed so that the components are curved and twisted to a desired shape, diffusion barriers are formed at selected positions on the intermediate sheet, the shaped components are assembled and located on suitable process tooling, the assembled components are diffusion welded together, the welded assembly is internally pressurized by gas to inflate and superplastically deform selected areas to form a hollow in said assembly, and performing finishing operations on the hollow assembly to obtain the hollow blade.