An adjustable lift support apparatus includes a holder, a base, a first fixed shaft, a support, a second fixed shaft, and a transmission shaft. The first fixed shaft is connected to the base and the holder, and a first gear is mounted thereon. The second fixed shaft is connected to the support and the...http://www.google.fr/patents/US7584933?utm_source=gb-gplus-shareBrevet US7584933 - Adjustable lift support apparatus
