I have tried to design a pair of oval gears using solid works. It seems that I have a problem getting the teeth to mesh properly through 360 degrees. I used the principal of creating a rack type gear (envolute) to act as a guide to cut the the path of the oval. The design of the oval rotates through the centres of both gears and the position is perpendicular to each other. Does anyone have a clue as to how some one would draw this in solid works or any other cad program where both ovals mesh through 360 degrees?

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