Patent ID: 7118549

Claim:
An anti-siphon device for limiting the flow of a fluid from a first region of a patient's body to a second region, comprising: a housing having a spherical inner surface with a predetermined inner diameter, said housing having an inlet port for receiving fluid from the first region and an outlet port for directing fluid to the second region, said inlet port and said outlet port are disposed approximately diametrically opposite from each other; and a spherical ball disposed within said housing, said spherical ball having a ferromagnetic weight disposed off center therein, said spherical ball having an outer diameter that is less than the inner diameter of said housing so that said spherical ball is free to rotate within said housing and the fluid is free to flow between said inner surface of said housing and an outer surface of said spherical ball, said spherical ball having a recess extending about the circumference of said spherical ball.