We followed that post up with a call for inventors and college project classes to consider trying design a free standing, energy harvesting, self powered version that did not require the use of the expensive underlying Smart Craft bus system.
Now, about two years later, Brunswick’s patent for the Moving Propeller Alert issued from the U.S. Patent and Trademark Office.
U.S. Patent 8,803,711
System and Methods for Displaying Operational Characteristics of Marine Vessels.
Inventor: Steven J. Gonring.
Assignee: Brunswick Corporation.
Issued 12 August 2014.
The patent application was filed back on January 28, 2011. It is a continuation of an application filed 22 September 2010 (about 4 years ago) so it probably had some problems along the way.
The patent cites U.S. Patent 7,247,063 by Marc S.Lemchen that detects propeller rotation and/or CO2 presence and generated a warning signal with the intent to warn a swimmer in the proximity.
The basic premise of the invention is that a device a bit larger than a coaster that has a series of led lights in the form of a circle (a circular array of lights). The lights blink in a rotary sequence to suggest rotation when the propeller is rotating at low to moderate speeds. Read More→