NEEDLELESS ACCESS PORT VALVES
First Claim
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1. A valve assembly comprising:
- a valve housing having an interior cavity, a bottom opening, and an inlet nozzle having an inlet opening and an interior wall surface along a central axis;
a piston positioned inside the valve housing having a flange, a neck section, a body section, and a base;
the piston further comprising a slit having a first slit surface and a second slit surface extending radially across two opposed exterior surface sections of the flange and lengthwise in a direction of the inlet opening towards the bottom opening and through at least part of the neck section below the flange, the first slit surface and second slit surface extending through at least part of the neck section below the flange and comprises an angle about the central axis.
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Abstract
Needleless access port valves are generally discussed herein with particular discussions extended to needleless access port valves incorporating a piston comprising slit along an upper piston section for accommodating fluid flow. The slit opens when the piston is compressed by a medical implement, such as a syringe tip, to permit fluid communication between the inlet and the outlet of the vale housing. The slit may be cut using high frequency cutting machine or a multi-axis robot arm and a cutting blade.
65 Citations
20 Claims
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1. A valve assembly comprising:
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a valve housing having an interior cavity, a bottom opening, and an inlet nozzle having an inlet opening and an interior wall surface along a central axis; a piston positioned inside the valve housing having a flange, a neck section, a body section, and a base;
the piston further comprising a slit having a first slit surface and a second slit surface extending radially across two opposed exterior surface sections of the flange and lengthwise in a direction of the inlet opening towards the bottom opening and through at least part of the neck section below the flange, the first slit surface and second slit surface extending through at least part of the neck section below the flange and comprises an angle about the central axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A valve assembly comprising:
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a piston positioned inside a valve housing, the piston comprising a flange, a neck section a body section comprising an upper section and a lower section defining an interior cavity, an exterior wall surface, and a base; the valve housing comprising an inlet nozzle having an inlet opening, a body section defining an interior cavity having an interior wall surface, and a bottom opening; wherein the neck section of the piston comprises a slit formed across the entire flange and through at least part of the neck section to the exterior wall surface of the piston in a helical configuration;
the slit defining a fluid space with the interior wall surface of the valve housing for fluid flow through the inlet nozzle and out the bottom opening. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of making a piston for use in an access port valve, said method comprising:
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molding a piston, said piston comprising a neck section of reduced diameter compared to a body section, which defines an interior cavity; and cutting a slit in the neck section; wherein the cutting step comprises rotating a blade by an angle about an axis of the piston while translating the blade by a distance along the axis. - View Dependent Claims (19, 20)
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Specification