Sonar dome

Details Sonar dome Sonar dome

2008-07-24

2009-12-29

Nguyen, Khanh (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including use of vacuum

C264S103000, C264S258000

Reexamination Certificate

active

07638085

ABSTRACT:
The Invention is a reinforced plastic sonar dome having a low acoustical insertion loss combined with sufficient mechanical strength. Acoustical and structural fibers are stochastically mixed and formed into a blended yarn. The blended yarn is woven into a blended fabric. The blended fabric is ordered into a stack having multiple layers of blended fabric. The blended fabric is incorporated into a polymer resin while the polymer resin is in liquid form using a vacuum assist. The acoustical fibers and the vacuum assist modify the acoustical properties of the resulting composite sonar dome.

REFERENCES:
patent: 4857377 (1989-08-01), Daimon et al.
patent: 5641366 (1997-06-01), Hohman
patent: 7408842 (2008-08-01), Caiazzo

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