It will be seen that a toy submarine 10 comprises an injection- molded tailpiece 20, an injection molded headpiece 40 and an ordinary rubber band 60. The preferred embodiment of the present invention may be understood by referring to FIGs. Some battery-powered designs also include a chemical reaction system for surfacing. While in theory it would be possible to use a counter-rotating propeller system to solve some of the above problems, in reality this would add too much complexity and cost for a simple toy. If too much power were introduce to the propeller, then the submarine would begin to rotate repeatedly in the direction opposite to the propeller. Battery powered submarines move very slowly because of the relatively small propeller and in order to prevent the submarine from twisting at too great an angle. In actual use, these submarines twist at an odd angle is response to the motor-driven propeller. In order to combat this tendency, the propeller is relatively small and the submarine is weighted such that the submarine will tend to remain in a generally upright orientation. With a single propeller turning, there is a tendency for the submarine to rotate in the opposite direction of the propeller. A63H29/18- Driving mechanisms with extensible rubber bandsīattery powered designs are usually neutrally buoyant and generally have a small battery powered motor with a single propeller.A63H29/00- Drive mechanisms for toys in general.A63H23/04- Self-propelled boats, ships or submarines.A63H23/00- Toy boats Floating toys Other aquatic toy devices.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from US09/527,149 external-priority Application filed by Carl Winefordner, Frank Hermansen filed Critical Carl Winefordner Priority to AU2001243699A priority Critical patent/AU2001243699A1/en Publication of WO2001070363A1 publication Critical patent/WO2001070363A1/en Links Inventor Carl Winefordner Frank Hermansen Original Assignee Carl Winefordner Frank Hermansen Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents WO2001070363A1 - Toy submarine with counter-rotating propellers WO2001070363A1 - Toy submarine with counter-rotating propellers
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