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:
Dec. 03, 1991
Filed:
Apr. 30, 1991
Applicant:
Inventors:
Graham A Cooper, Preston, GB;
Ian E Bottomley, Preston, GB;
Assignee:
British Aerospace PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228157 ; 228193 ; 228118 ;
Abstract
In a superplastic forming/diffusion bonding process, in particular for aluminum-lithium alloys, the stop-off material in the diffusion bonding step is a porous lamellar material such as glass cloth or vermiculite paper. In one embodiment, prior to diffusion bonding, the stack of alloy sheets and lamellar material may be sealed under vacuum.