In the early 2020s I met Franz Baier from Rotthalmünster, Germany. He is a retired mechanic for cars. He told me, that some decades ago, he was helping someone in a wheelchair. He noticed on an inclined plane, that it is hard to go straight and to work against this down drift. So he thought about a solution for this problem years later. He came up with his solution of a balanced wheelchair, with tiltable front wheels. I tried one of his prototypes my own, and it works just perfect ❤️❤️❤️.
Franz told me, he is to old to bring this into the market, but he made a patent for his invention. This patent is „free to use for everyone“. Franz is very idealistic, an outstanding person with strong believes.
So, now I try my best to make some progress here…