US Patent 9522781 Shuttle for automated warehouse

A warehouse shuttle includes a chassis made up of first and second chassis portions and an article-carrying area between the chassis portions. Pairs of first and second running wheels are provided on the chassis to travel along the runway. One of a pair of arms is mounted to the first chassis portion and the other of the arms is mounted to the second chassis portion and are extendable and retractable to transfer an article between one of the shelves and the article-carrying area. A connector assembly connects the first and second chassis portions and can vary the spacing between the first and second chassis portions thereby varying the spacing between the arms to engage articles of different widths.