Needleless access device
DCFirst Claim
Patent Images
1. A needleless access device comprising:
- a housing having an inlet opening, an outlet opening, and a channel therethrough;
a moveable piston inside said channel having a top surface and a bottom, the piston being adjacent said inlet opening and biased by a biasing member so that the top surface of the piston is normally generally flush with the inlet opening to facilitate aseptic treatment of the top surface of the piston, the piston comprising a wiper seal formed on a top section of said piston for sealing the inlet opening and wiping the surface of the channel surrounding the piston during actuation and release of the piston; and
a valve inside said housing comprising a valve member at the bottom of said piston and a valve seat, the valve member normally being biased against said valve seat by said biasing member.
4 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A needleless access device and method of using the device is disclosed. The needleless access device has a housing having an inlet opening and an outlet opening and a channel formed therethrough. Movably friction fitted in the channel adjacent the inlet opening is a piston. The piston is biased upwardly by a stretchable element. The stretchable element allows the top of the piston to be depressed by a syringe to a level adjacent internal flow channels to permit injection and aspiration of fluids through the device.
549 Citations
39 Claims
-
1. A needleless access device comprising:
-
a housing having an inlet opening, an outlet opening, and a channel therethrough; a moveable piston inside said channel having a top surface and a bottom, the piston being adjacent said inlet opening and biased by a biasing member so that the top surface of the piston is normally generally flush with the inlet opening to facilitate aseptic treatment of the top surface of the piston, the piston comprising a wiper seal formed on a top section of said piston for sealing the inlet opening and wiping the surface of the channel surrounding the piston during actuation and release of the piston; and a valve inside said housing comprising a valve member at the bottom of said piston and a valve seat, the valve member normally being biased against said valve seat by said biasing member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A needleless access device comprising:
-
a) a housing having an inlet opening, an outlet opening and a channel therethrough; b) a moveable piston having a top surface and a bottom, the piston being adjacent said inlet opening and biased so that the top surface of the piston is normally generally flush with or extends outwardly of the inlet opening; and c) a center support pin in said piston and protruding out of the top of said piston for transmitting force applied at the top of the pin to the bottom of the piston. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A needleless access device comprising:
-
a) a housing having an inlet opening, an outlet opening, and a channel therethrough; b) a moveable piston inside said channel and having a top surface, the piston being adjacent said inlet opening and biased so that the top surface of the piston is normally generally flush with or extends outwardly of the inlet opening to facilitate aseptic treatment of the top surface of the piston; and c) a wiper seal formed on a top section of said piston for wiping the surface of the channel surrounding the piston during actuation and release of the piston. - View Dependent Claims (24)
-
-
25. A needleless access device comprising:
-
a) a housing having an inlet opening, an outlet opening, and a channel therethrough; b) a moveable piston inside said channel having a top surface, the piston being adjacent said inlet opening and biased so that the top surface of the piston is normally generally flush with or extends outwardly of the inlet opening to facilitate aseptic treatment of the top surface of the piston, the piston comprising a wiper seal formed on a top section of said piston for sealing the inlet opening and wiping the surface of the channel surrounding the piston during actuation and release of the piston; and c) a stretchable member attached to the piston to provide said biasing, the stretchable member having at least one fluid flow opening therethrough. - View Dependent Claims (26)
-
-
27. A needleless access device comprising:
-
a) a housing comprising a cap, the housing having an inlet opening, an outlet opening, and a channel therethrough including a fluid passageway through said cap defined by a cap wall; b) a moveable piston located within said channel having a top surface and a bottom, the piston being adjacent said inlet opening and biased so that the top surface of the piston is normally generally flush with or extends outwardly of the inlet opening to facilitate aseptic treatment of the top surface of the piston; and c) the cap including at least one flow channel having an opening into the fluid passageway and formed in the side of the cap wall for allowing fluids injected through said inlet to flow around and past the bottom of said piston when the piston is forced to a position just below the opening of said flow channel.
-
-
28. A needleless access device comprising:
-
a) a housing comprising a cap, the housing having an inlet opening, an outlet opening, and a channel therethrough comprising a fluid passageway through said cap defined by a cap wall; b) a moveable piston located within said fluid passageway and having a top surface, the piston being adjacent said inlet opening and biased by a biasing member so that the top surface of the piston is normally generally flush with or extends outwardly of the inlet opening to facilitate aseptic treatment of the top surface of the piston; c) the channel also comprising at least one longitudinal flow channel formed in the side of said cap wall for bypassing said piston; and d) a valve inside said housing for sealing said longitudinal flow channel to prevent backflow from said outlet to said inlet.
-
-
29. A needleless access device comprising:
-
a housing having an inlet opening, an outlet opening, and a channel therethrough, said housing comprising a cap and a body sealed together by a sonic weld; a moveable piston having a top surface and a bottom, the piston being adjacent said inlet opening and biased by a biasing member so that the top surface of the piston is normally generally flush with the inlet opening to facilitate aseptic treatment of the top surface of the piston; and a valve inside said housing comprising a valve member at the bottom of said piston and a valve seat, the valve member normally being biased against said valve seat by said biasing member.
-
-
30. A needleless access device comprising:
-
a housing comprising a cap having an inlet opening therein and a body having an outlet opening therein, the housing having a channel therethrough, the channel comprising a fluid passageway through said body; a moveable piston having a top surface and a bottom, the piston being adjacent said inlet opening and biased by a stretchable biasing member attached to the piston so that the top surface of the piston is normally generally flush with the inlet opening to facilitate aseptic treatment of the top surface of the piston; a valve inside said housing comprising a valve at the bottom of said piston and a valve seat, the valve member normally being biased against said valve seat by said biasing member, said body fluid passageway comprising a contoured wall to prevent cutting or tearing the stretchable member during actuation of said piston.
-
-
31. A needleless access device comprising;
-
a cap having an inlet opening and a channel formed therein; a piston movably friction fitted in said channel and being biased to seal said inlet opening; a stretchable member connected said piston to provide said biasing; and a body having an outlet opening formed therein, said body attached to said cap, said stretchable member having edges locked between said body and said cap. - View Dependent Claims (32)
-
-
33. A needleless access device comprising:
-
a) a cap having an inlet opening and a channel formed therein; b) a piston movably friction fitted in said channel and being biased to seal said inlet opening, the piston having a top and bottom, being of a soft material and comprising an insert molded center core pin for providing rigidity to the piston; c) a stretchable member connected to said piston to provide said biasing; and d) a body having an outlet opening formed therein, said body attached to said cap, said stretchable member having edges locked between said body and said cap. - View Dependent Claims (34)
-
-
35. A needleless access device comprising:
-
a) a housing comprising a cap and a body, the housing having an inlet opening, an outlet opening, and a channel therethrough; b) a moveable piston within said channel and biased toward said inlet opening; and c) a stretchable member attached to the piston to provide said biasing, the stretchable member comprising one or more ribs captured between said cap and said body to hold said stretchable member in a biased position.
-
-
36. A method for operating a needleless access device comprising a moveable piston fitted in a cap having an inlet opening and channel formed therein for receiving a syringe, said cap including at least one flow channel having an entrance opening into said channel formed in the side wall of the cap, said piston comprising a wiper seal sealing said channel above the entrance opening to said flow channel and said piston being biased towards the inlet opening by a stretchable member;
- comprising the step of;
inserting a syringe through said inlet opening and using the syringe to force said piston down said channel to a location where said wiper seal moves past said opening to said at least one flow channel to permit injection and aspiration of fluids through the device. - View Dependent Claims (37, 38, 39)
- comprising the step of;
Specification