Li Rongbiao, un bărbat de 67 de ani din Beijing, a venit cu această idee după ce soţia sa şi-a rupt un picior. Cei doi pensionari locuiau la etajul cinci al unei clădiri şi le era foarte greu să se deplaseze pe scări, iar ascensor nu exita în imobil.
Deşi nu dispunea de pregătire în domeniile fizicii sau mecanicii, bătrânul şi-a vândut apartamentul cu echivalentul a aproximativ 50.000 de euro şi s-a apucat de construcţia unui scaun cu rotile cu totul special.
Li a cumpărat cărţi şi aproximativ jumătate de an a învăţat design-ul pe computer. Apoi încă o jumătate de an i-a luat să proiecteze scaunul cu rotile. Invenţia sa electrică poate urca aproximativ 3.000 de trepte, adică echivalentul a 50 de etaje.
Deocamdată, prototipul necesită o persoană care să folosească o minimă forţă pentru manevrarea sa, însă bătrânul susţine că viitoarea versiune nu va mai avea acest impediment.
Iată cum arată un alt scaun cu rotile care poate urca trepte:
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