US Patent 10350745 Gravity locking mechanism

A gravity locking system includes a mounting structure and an article which includes an alignment structure, gravity load structure, and locking structure. The alignment structure is fixed to the article and aligns the article with the mounting structure. The gravity load structure is movable on the article and biased toward an unrestrained position. As the article moves toward the mounting structure, the gravity load structure moves away from the unrestrained position. The locking structure is movable on the article such that movement of the gravity load structure away from and toward the unrestrained position corresponds with movement of the locking structure toward and away from a closed position respectively. When weight of the article is supported by the gravity load structure on the mounting structure, the locking structure is urged against the mounting structure to lock the locking mechanism.