Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Patent
1998-09-10
1999-12-07
Jones, Deborah
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
428 73, 428118, 244 1W, 244119, 181286, 181292, 181294, B32B 312
Patent
active
059979852
ABSTRACT:
In accordance with the present invention, there is provided a method of forming an acoustic attenuation chambers within a honeycomb core. The honeycomb core have a plurality of honeycomb cells having interconnected side walls. A plurality of septum layers are spaced from one another within the honeycomb cells to define acoustic attenuation chambers between the septum layers and the side walls of the honeycomb cells. Each of the septum layers have an associated ablating wavelength and is transparent to the ablating wavelengths of the other septum layers. A laser beam having a laser wavelength is directed towards the septum layers. The laser beam is selectively absorbed by a septum layer which has an associated ablating wavelength equal to the laser wavelength to ablate apertures therethrough without ablating other septum layers.
REFERENCES:
patent: 3435186 (1969-03-01), Roshon, Jr. et al.
patent: 3770560 (1973-11-01), Elder et al.
patent: 3948346 (1976-04-01), Schindler
patent: 4091892 (1978-05-01), Hehmann
patent: 4161231 (1979-07-01), Wilkinson
patent: 4235303 (1980-11-01), Dhoore et al.
patent: 4257998 (1981-03-01), Diepenbrock et al.
patent: 4265955 (1981-05-01), Harp et al.
patent: 4318453 (1982-03-01), Rose et al.
patent: 4327816 (1982-05-01), Bennett
patent: 4421201 (1983-12-01), Nelsen et al.
patent: 4421811 (1983-12-01), Rose et al.
patent: 4475624 (1984-10-01), Bourland et al.
patent: 4743123 (1988-05-01), Legters et al.
patent: 4816097 (1989-03-01), Williams et al.
patent: 4850093 (1989-07-01), Parente
patent: 4915981 (1990-04-01), Traskos et al.
patent: 4926963 (1990-05-01), Snyder
patent: 5059256 (1991-10-01), Kanapenas et al.
patent: 5169678 (1992-12-01), Cole et al.
patent: 5227013 (1993-07-01), Kumar
patent: 5487852 (1996-01-01), Ludden et al.
patent: 5532440 (1996-07-01), Fujiwara
patent: 5593606 (1997-01-01), Owen et al.
patent: 5626771 (1997-05-01), Davis et al.
patent: 5653836 (1997-08-01), Mnich et al.
Clarke James A.
Kunze, Jr. Robert K.
Anderson Terry J.
Hoch Jr. Karl J.
Jones Deborah
Northrop Grumman Corporation
Resnick Jason
LandOfFree
Method of forming acoustic attenuation chambers using laser proc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of forming acoustic attenuation chambers using laser proc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming acoustic attenuation chambers using laser proc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-821267