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:
Jan. 30, 2001
Filed:
Feb. 08, 1999
Horst Bansemir, Munich, DE;
Walter Gembler, Ottobrunn, DE;
Ottmar Haider, Unterhaching, DE;
Christian Ritzer, Munich, DE;
Eurocopter Deutschland GmbH, Munich, DE;
Abstract
A sandwich composite panel (,) provides a load bearing structural member as well as noise protection, especially for a helicopter fuselage cell or cabin. The panel (,) includes an inner honey-comb core (,) made up of hollow cell bodies (,) extending trans-versely and sandwiched between first and second cover skins (,) of fiber composite material. In order to achieve a low weight, a simple manufacturing, and good noise absorption, at least one of the cover skins (,) adapted to face the main source of noise (H) is made up of an open mesh fiber composite net (,) and a flexible cover film (,) applied on the outer surface of this fiber composite net (,). The net (,) has a smaller mesh size than the inner cross-sectional size of the hollow cell bodies (,).