07-11-2013 дата публикации
Номер: US20130296786A1
Valves, valved fluid transfer devices and ambulatory infusion devices including the same. 1. An apparatus for use in an implantable medical device , the apparatus comprising:a pump, having an inlet and an outlet, configured to be carried within the implantable medical device; and a valve seat with an opening, and', 'a valve element movable relative to the valve seat between a closed position where the valve element engages the valve seat to prevent flow through the opening and an open position where the valve element is in spaced relation to the valve seat to allow flow through the opening,', 'wherein one of the valve seat and the valve element includes a main portion and a seal portion that is less tacky than the main portion and is in contact with the other of the valve seat and the valve element when the valve element is in the closed position., 'an outlet valve, located downstream from the pump outlet, including'}2. An apparatus as claimed in claim 1 , wherein the main portion is formed from an elastomeric material selected from the group consisting of silicone rubber claim 1 , latex rubber claim 1 , fluoropolymers claim 1 , urethane claim 1 , butyl rubber claim 1 , and isoprene.3. An apparatus as claimed in claim 1 , whereinthe main portion is formed from an elastomeric material; and a layer of silicon suboxide on the main portion,', 'a relatively thin layer of a relatively hard elastomeric material,', 'a relatively thin layer of a fluoroelastomer or a low friction protective coating, and', 'a coating of a filler material., 'the seal portion is selected from the group consisting of'}4. An apparatus as claimed in claim 1 , whereinthe main portion is formed from an elastomeric material; and a surface of the valve seat main portion that has been halogenated,', 'a surface of the valve seat main portion that has been implanted with ions of a ceramic material or ions of a metal material or ions of a metal oxide material, and', 'a surface of the valve seat main ...
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