PropellerSafety.com

Archive for inventions

Are Propeller Guard Technologies Being Suppressed by the Boating Industry, Along With Other Propeller Safety Devices?

Many have accused the boating industry of suppressing the development and deployment of propeller guards and other propeller safety devices. A list of ways in which the boating industry has been accused of suppressing propeller guard inventions, technologies and other propeller safety technologies is provided below. They are grouped by events or topics and partially […]

Detecting People Near Boats More Reliably Using Optical Image Stabilization: An Invention

Our Detecting People Near Boats More Reliably Using Optical Image Stabilization invention disclosure below was posted on 19 September 2012. We will make no changes to the text below the line following this paragraph except to correct misspellings, punctuation, and to update html/computer codes and links. Any updates to the invention will be posted below […]

RingProp Intellectual Property for Sale by Edward Symmons

Several years ago, a UK firm tried to commercialize a ringed propeller from Australia called RingProp. The propeller was said to be safer than traditional propellers because human limbs could not easily enter between the blades. When the propeller was spinning it created a shroud around the blades. Efforts to develop RingProp were spread over […]

Cushioned Propeller Guard – Senior Design Project

Marine drive companies have long employed damping / cushioning technologies to protect marine drives, most typically trim cylinder log strike systems that allow the drive to swing back, up, and over underwater obstacles. Recent years have brought several through hull drives to the market, most prominently Volvo Penta’s IPS, and Brunswick’s / Cummins Mercruiser Diesel […]

Propeller Guard Drag Research Projects – Senior Design Projects

Boat propeller guards create drag which effects the performance of the boat, especially the top speed attainable at wide open throttle and time to plane. Propeller guard designers try to minimize drag by increasing the size of the mesh (make the open holes larger) and by decreasing the size of the wires / rods used […]

RFID Boat Kill Switches (Engine Cut-Off Switches) – Five PGIC Invention Disclosures Posted August 29, 2011

Today, August 29, 2011, we, the Propeller Guard Information Center, posted five RFID (Radio Frequency Identification) invention disclosures. While they have other implications as well, they were primarily inspired by problems surrounding boat engine kill switches (emergency engine cut-off switches). We (Polson Enterprises and the Propeller Guard Information Center) initially retained all rights to these […]

RFID Clothing Used to Detect Human Presence in Boat Kill Switch Applications invention

Our RFID Clothing Used to Detect Human Presence in Boat Kill Switch Applications invention disclosure below was posted on 29 August 2011. It is one of five related Radio Frequency Identification (RFID) invention disclosures we posted today. We will make no changes to the invention disclosure that begins with text below the horizontal line following […]

Non-Unique RFID Fob / RF Reflector Used to Detect Human Presence and/or Human Proximity and/or Human Location invention

Our non-unique RFID Fob / RF Reflector Used to Detect Human Presence and/or Human Proximity and/or Human Location invention disclosure below was posted on 29 August 2011. It is one of five related RFID invention disclosures we posted today. We will make no changes to the invention disclosure that begins with text below the horizontal […]

Our Earlier Propeller Safety Inventions

We created this Propeller Safety Inventions category in August 2011. I am listing some of our earlier inventions and linking to them here. We will be posting our future inventions in this category. If PGT<2011 is beside the invention, more can be read about it on our Pre 2011 Propeller Guard Technologies page at the […]