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. 31, 1992
Filed:
Jun. 27, 1990
Tony M Krauss, Bay Village, OH (US);
Craig R Boyer, N. Olmsted, OH (US);
Donald J Moracz, Garfield Heights, OH (US);
Compressor Components Textron Inc., Cleveland, OH (US);
Abstract
A method of making a hollow article, for example, a hollow airfoil, from first and second preformed sections involves a first precursor (seal) bonding step where a low external pressure and internal vacuum are utilized to form a substantially gas impermeable seal bond between opposing bonding surfaces of the sections with only limited distortion of one of the sections and no distortion of the other section, a diffusion bonding step where a high external and high internal pressure is utilized to form a complete parent metal diffusion bond between the bonding surfaces without distortion of either section and an inflation step where a high external and high internal pressure are utilized to remove the limited distortion from the affected section without distortion of the unaffected section. The inflation step and diffusion bonding step can be combined into one operation to provide a two step method of making the hollow article.