초록 ▼

An administration set including a burette with an air valve communicating with the burette chamber. The air valve comprises a stationary port extending from a top portion of the burette chamber with a fitting closing the port except for a small passageway defined by a top portion of the fitting. A p

An administration set including a burette with an air valve communicating with the burette chamber. The air valve comprises a stationary port extending from a top portion of the burette chamber with a fitting closing the port except for a small passageway defined by a top portion of the fitting. A pivotable closure overlies the port and is pivotally connected therewith. The pivotable closure defines an opening for communication with the small passageway when the closure is pivoted to a predetermined open position. The closure opening and the passageway are segregated when the closure is not in the predetermined open position. A filter member is received within the port and directly underlies the small passageway.

대표청구항 ▼

In a medical device having a chamber, an air valve comprising a stationary port extending from a wall of said chamber and defining a bore therethrough, said port including a fitting shaped to define an open internal portion, a top portion of said fitting shaped to define a passageway, said fitting c

In a medical device having a chamber, an air valve comprising a stationary port extending from a wall of said chamber and defining a bore therethrough, said port including a fitting shaped to define an open internal portion, a top portion of said fitting shaped to define a passageway, said fitting closing said port except for said passageway, with said passageway being substantially smaller than the open internal portion, a filter member located transverse said bore and directly underlying said passageway, a pivotable closure overlying the port and being pivotally connected therewith, said pivotable closure shaped to define an opening for communication with said passageway when the closure is pivoted to a predetermined open position, and means for segregating said closure opening from said passageway when said closure is in its closed position, said segregating means comprising a resilient member movable with the pivoting movement of said closure to close and seal said passageway when the closure is not in said predetermined open position, said fitting being proportioned to compress the resilient member while it is closing and sealing said passageway.