Apparatus for reducing fluid drawback through a medical valve
First Claim
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1. A medical valve for valving fluid, the valve comprising;
- a housing having a fluid passageway therein, the fluid passageway including a chamber;
a compressible member within the chamber; and
a movable cannula defining a part of the fluid passageway, the cannula having an inlet with an opening, the opening having a size that is substantially the same size as at least a portion of the part of the fluid passageway through the cannula.
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Accused Products
Abstract
A medical valve for valving fluid includes a housing defining a chamber having an inlet, an outlet, and an interior wall, a compressible member within the chamber, and a fluid channel defined by the interior wall. The fluid channel directs fluid received from the inlet toward the outlet.
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Citations
42 Claims
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1. A medical valve for valving fluid, the valve comprising;
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a housing having a fluid passageway therein, the fluid passageway including a chamber;
a compressible member within the chamber; and
a movable cannula defining a part of the fluid passageway, the cannula having an inlet with an opening, the opening having a size that is substantially the same size as at least a portion of the part of the fluid passageway through the cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medical valve for valving fluid, the medical valve having an open mode for permitting fluid flow through the valve, the medical valve also having a closed mode for preventing fluid flow through the valve, the medical valve comprising:
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a housing having an interior wall defining a variable volume fluid chamber for receiving fluid;
a movable cannula forming at least a part of a fluid passageway through the housing, the cannula having an inlet with an opening, the opening having a size that is substantially the same size as at least a portion of the part of the fluid passageway through the cannula;
a compressible member within the variable volume fluid chamber, the compressible member and interior wall defining a closed chamber volume within the fluid chamber when the valve is in the closed mode, the compressible member and interior wall defining an open chamber volume within the fluid chamber when the valve is in the open mode, the closed chamber volume being less than the open chamber volume. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A medical valve for valving fluid, the valve permitting fluid flow when in an open mode, the valve preventing fluid flow when in a closed mode, the valve comprising;
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a housing containing a fluid passageway;
an interior wall defining a chamber, the chamber being within the fluid passageway;
a compressible member within the chamber, the compressible member having a maximum volume and a minimum volume; and
a movable cannula having an inner passageway that defines a part of the fluid passageway, the cannula having an inlet with an opening, the opening having a size that is substantially the same size as at least a portion of the part of the fluid passageway through the cannula;
the compressible member having a volume equal to the maximum volume when the valve is in the closed mode;
the compressible member having a volume equal to the minimum volume when the valve is in the open mode. - View Dependent Claims (19, 20, 21, 22)
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23. A medical valve for valving fluid, the medical valve comprising:
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a housing containing a fluid passageway for directing fluid through the valve, the housing also containing a valve chamber having an inlet for receiving fluid from the fluid passageway;
movable cannula defining a part of the fluid passageway, the cannula having an inlet with an opening, the opening having a size that is substantially the same size as it least a portion of the part of the fluid passageway through the cannula;
a compressible member within the chamber, the compressible member dividing the valve chamber into a fluid chamber and a member chamber, the fluid chamber receiving fluid from the inlet and having a fluid outlet for directing fluid to the fluid passageway, the member chamber being defined by the compressible member and a chamber wall; and
a flexible gland member supporting the cannula within the housing. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37)
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36. A medical valve for valving fluid, the medical valve comprising:
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a housing containing a fluid passageway for directing fluid through the valve, the fluid passageway being formed at least in part by a movable channel means for channeling fluid, the movable channel means having an inlet with an opening, the opening having a size that is substantially the same size as at least a portion of the part of the fluid passageway through the movable channel means;
a valve chamber defined by the housing and being in communication with the fluid passageway; and
means for reducing the volume of the valve chamber. - View Dependent Claims (38, 39, 40, 41, 42)
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Specification