Patent ID: 8753061

Claim:
A transport system having multilayer tracks, the transport system applied for a semiconductor manufacturing process, the transport system comprising: a bottom track; at least one top track arranged above the bottom track; and a first shuttle carriage and a second shuttle carriage respectively traversing on the top track and the bottom track, each of the first and second shuttle carriages including: a shuttle body having at least one opening and a receiving compartment communicating with the opening, wherein the shuttle body has a locking arm pivotally connected to a bottom inner side thereof and a fastening hole defined on a top inner side thereof, and wherein the locking arm has an integrally formed protrusion protruding therefrom configured to aligningly engage with the fastening hole; a moving unit connected with the shuttle body, wherein the moving unit corresponds to the bottom track and the top track; and a carrying unit movably disposed in the receiving compartment to access payloads from the receiving compartment; a retractable support member disposed on an inner lower portion of the shuttle body; wherein the locking arm of the first shuttle carriage on the top track is configured to rotate from a horizontal position to a vertical position, and the protrusion of the locking arm is configured to directly engage in the corresponding fastening hole of the second shuttle carriage on the bottom track to form a connected shuttle unit; wherein the carrying unit of one of the first and second shuttle carriages is configured to reciprocatingly move between the first and second shuttle carriages of the connected shuttle unit to transport an object between the bottom and upper tracks; wherein the retractable support member is configured to position-translate between a close position and an open position to selectively support the object.