Method and a system for counteracting marine biologic fouling of

Details Method and a system for counteracting marine biologic fouling of Method and a system for counteracting marine biologic fouling of

1989-05-26

1990-07-24

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Miscellaneous

367139, 181 05, 114222, H04B 1100, B63B 5900

Patent

active

049439545

ABSTRACT:
A system and a method for counteracting marine fouling of e.g. a vessel hull (1) are provided.
Electro-mechanical vibration transducers (2, 3) are arranged in pairs adjacent to fixed (clamped) nodal lines (4) on said hull (1), and are driven in an inverted phase relationship in order to provide a water particle movement in a hull parallel direction right outside said nodal lines (4) in addition to the hull perpendicular relative movements right outside said transducers (2, 3).
The invention also comprises a combination of the mechanical system above and a special surface coating which counteracts fouling from other organisms than those influenced by said water particle movement in the infrafrequency range.

REFERENCES:
patent: 4058075 (1977-11-01), Piper, Sr.
patent: 4244749 (1981-01-01), Sachs et al.

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