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Swimming-aquatic-creature-simulator

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Swimming aquatic creature simulator

Details

Inventors: Pell, Charles A.; Wainwright, Stephen A.;
Assignee: Nekton Technologies, Inc. (Durham, NC)
Primary Examiner: Rimell; Sam
Assistant Examiner:
Attorney, Agent or Firm: Myers Bigel Sibley & Sajovec

A swimming aquatic creature simulator having a body which propagates waves of undulation of and along that body to thereby propel the simulator through a fluid in a lifelike manner. The body is formed of an elastomeric material and may be shaped like a fish. Applying oscillating rotational motion to the body at a location forward of the center of mass of the body produces undulating movements of the body which propel the simulator. The oscillating motion input may be provided by twisting a rigid shaft or flexible cable, which is connected to the body at a point forward of the center of mass. An internal motor can also be used to provide the oscillating motion input.

DETAILED DESCRIPTION The present invention pertains to a swimming creature simulator having an elongate elastomeric body approximately as dense as water, the elongate body having a forward portion forward of the center of mass of the body and a tail portion rearward of the center of mass.
The tail portion is tapered in a frontal plane of the body so that the tail portion has a greater cross-sectional thickness toward the center of mass than at the rear tip of the body.
Means for imparting oscillating rotational motion is provided at a point forward of the center of mass of the body.
The rotational motion occurs about an axis which is perpendicular to a frontal plane of the body and in the median plane of the body.
When the swimming creature simulator is placed in water, input of oscillating rotational motion causes rearward traveling undulating movements in the body which propel the simulator through the water.
The present invention further pertains to methods of propelling a swimming creature simulator through a fluid.
The present invention, in another form thereof, pertains to a device for transducing oscillating rotary movement into rearwardly propagating waves of undulation.
The device comprises an elongate body of elastomeric material having a forward portion forward of the center of mass of the body and a rearward portion rearward of the center of mass.
The rearward portion is tapered rearwardly in a frontal plane of the body so as to have a greater cross-sectional thickness toward the center of mass than at the rear of the body.
Means for imparting oscillating rotational motion to a point forward of the center of mass is provided.
Rotational motion occurs about an axis which is perpendicular to the frontal plane and in the median plane of the body.
When the elongate body is placed in a body of fluid, the input of oscillating rotational motion causes rearwardly propagating waves of undulation in the elongate body.
When the device is fixed in position with respect to a base and inserted in a body of fluid, the undulating movements transport fluid from the forward portion of the body toward the rearward portion

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