Patent ID: 9334113
Filing Date: 2016-05-10
CPC Classification: B65G

Claim Text:
1. A material handling system for storing and retrieving containers or articles, comprising: a grid comprising a plurality of carts having a first set of wheels configured to selectively travel along said first paths and having a second set of wheels configured to selectively travel along said second paths; a plurality of storage areas, respective portions of a third plurality of said second paths underlying said storage areas, said storage areas configured to support containers or articles above said respective underlying portions such that said carts may travel along said underlying portions without being impeded by containers or articles held by said storage areas; and a controller in communication with said plurality of carts, wherein said controller comprises at least one processor that executes instructions to cause said carts to perform operations, said operations comprising selectively traveling to any of a plurality of locations within said grid, said travel including traveling along respective underlying portions of said second paths to reach destinations not on said respective underlying portions.