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:
Mar. 28, 1995
Filed:
Jul. 09, 1992
Applicant:
Inventors:
George W Stacher, Westminster, CA (US);
Seb R Sarkisian, Torrance, CA (US);
Assignee:
Rockwell International Corporation, Seal Beach, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
428594 ; 428586 ; 428593 ; 228118 ; 228157 ;
Abstract
A stack of metallic sheets is constructed for selective diffusion bonding followed by superplastic forming to yield a metallic sandwich structure. The invention resides in the provision of gas distribution channels in the stack for assuring balanced and complete distribution of gas throughout the unbonded areas of the stack. The gas is used for expansion of the stack into a sandwich structure during the step of superplastic forming. The novel construction of each channel comprises superimposed grooves in opposed face sheets of the stack and slots in the core sheet(s) of the stack.