Water craft using piezoelectric materials

Details Water craft using piezoelectric materials Water craft using piezoelectric materials

1995-08-07

1997-04-15

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310371, H01L 4108

Patent

active

056212640

ABSTRACT:
A flexible layer of piezoelectric material, e.g., a known PVDF polymer, is used for generating electrical energy for use on a water craft. In one arrangement, the sheet is laminated within a craft hull of fiberglass. Electrodes are provided for the major opposite surfaces of the layer, and an encapsulating material, e.g., fiberglass or a layer of the polymer itself, comprises the water contacting, exterior surface of the hull. In salt water, the water is one electrode, and an outer encapsulating layer is omitted. Spaced apart air pockets are optionally provided along the polymer sheet for increasing the flexing thereof in response to passing water and for inducing turbulence in the passing water. Elongated, flexible and electroded sheets, optionally including air pockets, are towed behind or beneath the craft, or are flown from a mast on the craft.

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