Patent ID: 7422566

Claim:
An adjustable hydrocephalus pressure control arrangement to control the pressure of the fluid in the cranium of a hydrocephalus patient, said pressure control arrangement comprising: a housing comprising an inlet opening for permitting entry of fluid into said housing and an outlet opening for permitting exit of fluid from said housing; said housing comprising a flexible housing wall; said flexible housing wall comprising an inside surface and an outside surface; said inside surface of said flexible housing wall comprising a flat frictional surface; a valve arrangement being disposed in said housing and being configured and disposed to control flow of fluid through said housing, said valve arrangement comprising: a ball structure being disposed adjacent said inlet opening; a spring structure being configured and disposed to apply pressure to said ball structure to control flow of fluid through said inlet opening and into said housing; a rotor being connected to said spring structure to adjust said spring structure to increase or decrease pressure on said ball structure; said rotor comprising magnets being configured and disposed to be acted on by an outside magnetic force to rotate said rotor in a clockwise or counterclockwise manner to adjust said spring structure; said rotor comprising a flat frictional surface being configured and disposed to make frictional contact with said flat frictional surface of said inside surface of said flexible housing wall to thus hold said rotor stationary and minimize unintentional movement of said rotor; a rotor support structure being configured and disposed to project from said inside surface of said flexible housing wall and through a central portion of said rotor; and said rotor being disposed to be rotated about said rotor support structure, and being operatively connected to said rotor support structure; and said flexible housing wall being configured, upon application of a pressing force on said outside surface of said flexible housing wall, to be bent inwardly to move said rotor support structure axially to thus displace said rotor operatively connected to said rotor support structure out of contact with and a distance away from said flat frictional surface of said inside surface of said flexible housing wall to permit rotation of said rotor; and said flexible housing wall being configured, upon absence of a pressing force on said outside surface of said flexible housing wall, to be bent outwardly to move said rotor support structure axially to thus displace said rotor operatively connected to said rotor support structure into contact with and biased against said flat frictional surface of said inside surface of said flexible housing wall.