Patent attributes
A first hinge includes a rotatable first shaft and a second hinge includes a rotatable second shaft. The first shaft includes first, second, and third position retainers mounted thereon. A link plate is mounted on the first and second shafts. The first position retainer is rotatably engaged with the second position retainer and the link plate. The first position retainer is rotatable relative to the second position retainer and is rotatable to a position restrained by the second position retainer and the first and second position retainers are rotatable together. The second position retainer and the link plate are rotatably engaged and include a projection selectively received in a notch. The second position retainer and the third position retainer are rotatably engaged and include a projection selectively received in a cavity. A drive system interconnects the first and second shafts and rotates the first and second shafts simultaneously.
