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:
Sep. 16, 2003
Filed:
Jun. 06, 2000
Akif O. Bolukbasi, Phoenix, AZ (US);
Joyanto Kumar Sen, Scotsdale, AZ (US);
The Boeing Company, Chicago, IL (US);
Abstract
An energy absorbing stitched-composite structural element is provided having a glass thread stitched therethrough. The stitching pattern of the thread varies in density from a low-density portion at an initial impact portion of the panel to a high density portion at a final impact portion of the panel. Preferably, the stitch pattern includes a plurality of rows laterally spaced apart relative to the height of the panel. The spacing between adjacent rows progressively decreases from the initial impact portion of the panel to the final impact portion of the panel. Alternatively, or in combination therewith, the number of stitches per row varies from the fewest number of stitches proximate the initial impact portion of the panel to the final impact portion of the panel. In a highly preferred embodiment of the present invention, the stitched composite panel is incorporated into the subfloor structure of an aircraft fuselage.