Patent ID: 7793899

Claim:
A suction device, comprising: a suction unit comprising a suction disc and a pulling element, said pulling element being engaged to a central area of a top of said suction disc; a fixing unit located on top of said suction unit, said fixing unit having a shell with a convex central area, and having a channel hole at a center of said shell, said pulling element of said suction unit extending through said channel hole to a top of said shell of said fixing unit, a top surface of said shell having a set of racks; a press unit positioned between an area close to a circumference of said fixing unit and a top surface of said suction unit; and a linkage positioning unit, located at a top of said fixing unit, and forming a linked movement with said suction unit, said linkage positioning unit being adapted to pull said pulling element to move upward, and latching or releasing said pulling element from an uplifted position; wherein when said fixing unit is partially tilted due to an exerted force caused by hanging an object, said press unit remains tightly pressed against a surface close to a circumference of said suction unit to maintain a strong suction hold; and wherein the set of racks is coupled with said linkage positioning unit to form the linked movement with said pulling element of said suction unit.