Unicycle for operation in water

This page shows U.S. patent #5509831, which is for a "Unicycle for operation in water". I've actually wondered if such a thing would be possible, but I never figured out how one would do it.

The patent shown here is in the form of 8 scanned images from the IBM Patent Server.
Page 1 Abstract and picture
Page 2 Figure 1
Page 3 Figures 2 and 3
Page 4 Figures 4 and 5
Page 5 Figures 6 and 7
Page 6 First page of description
Page 7 Second page of description
Page 8 Third page of description


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