Implantable drainage valve for the treatment of hydrocephalus
AssigneeCordis Corporation
InventorOlivier Bonnal
Life of this patent
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Abstract
An implantable drainage valve for the treatment of hydrocephalus includes a housing having an opening at each end and a fluid passageway therebetween, a valve seat within the housing at one end, a closure element dimensioned to be seated in the valve seat, a spring member within the housing secured at the opening opposite the valve seat and a feeder disposed between the closure element and the spring which transmits force from the spring to the closure member. When the housing is in a substantially vertical position, the closure is subjected to a downward force including a force from the spring and the weight of the feeder.
Claims7
An implantable drainage valve for the treatment of hydrocephalus, comprising:
- a housing having a first fluid opening a one end thereof, a second fluid opening at an opposite end thereof and a fluid passageway therebetween;
- a valve seat within said passageway at said first fluid opening;
- a closure element dimensioned to be seated within said valve seat;
- a spring member within said housing having a first end and a second end, said first end being secured at said second fluid opening;
- and
- a feeder disposed between said closure element and the second end of said spring member which transmits force from the spring to the closure member,
- wherein when said housing is in a substantially vertical position, the closure member is subjected to a downward force including a force from the spring and weight of the feeder.
Dependencies are inferred from the claim text.