US Patent 7187538 Hinge for electronic device

A movable portion of an electronic device is attached to a base portion of the device by a hinge mechanism that enables an edge of the movable portion to translate as the movable portion is rotated during the opening of the portable electronic device. In one example embodiment, the hinge mechanism comprises a groove in the base portion, a guiding feature on the moveable portion that engages the groove, and a link attached to both the base portion and the moveable portion of the electronic device, the link relating relates the motions of the two portions such that the electronic device opens as the guiding feature travels along the groove.