Patent ID: 8132662

Claim:
A conveyor comprising: a support base; a linear driving mechanism mounted on the support base, the linear driving mechanism comprising: two substantially parallel threaded rods; two threaded members respectively engaging with the two threaded rods; two actuators respectively rotating the two threaded rods; and two slide members slidable relative to the support base and respectively secured to the two threaded members; a carrier; and a linkage bar mechanism pivotally connecting the carrier and the linear driving mechanism, the linkage bar mechanism comprising a first bar, a second bar, and a third bar, wherein the first, second, and third bars are pivotally connected to the slide members and the carrier; the first bar, the third bar, the slide member carrying the first bar, and the carrier cooperatively form a parallel four-bar mechanism, and the first bar, the second bar, the slide member carrying the second bar, and the carrier cooperatively form a trapezoidal four-bar mechanism.