Vented needle for medical liquids
First Claim
Patent Images
1. A lateral delivery vented needle comprising:
- a cannula with a closed forward end, a rear end, and a side port adjacent its closed forward end;
said cannula having a longitudinal external groove with a forward end adjacent the side port and with a rear end adjacent a rear portion of the cannula;
stop means of the cannula preventing a rear portion of the groove from entering a container'"'"'s resilient stopper;
said cannula and stop means forming a unit that has a lateral gas vent means to an exterior of the stop means; and
a hub joined to a rear portion of the cannula, whereby the needle can puncture a resilient closure of a container, and liquid can be laterally injected into the container through the cannula'"'"'s side port, while gas within the container vents around the cannula'"'"'s closed end to the cannula groove.
2 Assignments
0 Petitions
Accused Products
Abstract
A thermoplastic needle for injecting sterile liquid into a vial with lateral turbulent motion while air from such vial escapes through a special vent groove on the needle. The needle also has spaced stop wings adjacent a rear portion of the vent groove to prevent overinsertion and occlusion of the vent groove.
181 Citations
13 Claims
-
1. A lateral delivery vented needle comprising:
- a cannula with a closed forward end, a rear end, and a side port adjacent its closed forward end;
said cannula having a longitudinal external groove with a forward end adjacent the side port and with a rear end adjacent a rear portion of the cannula;
stop means of the cannula preventing a rear portion of the groove from entering a container'"'"'s resilient stopper;
said cannula and stop means forming a unit that has a lateral gas vent means to an exterior of the stop means; and
a hub joined to a rear portion of the cannula, whereby the needle can puncture a resilient closure of a container, and liquid can be laterally injected into the container through the cannula'"'"'s side port, while gas within the container vents around the cannula'"'"'s closed end to the cannula groove. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a cannula with a closed forward end, a rear end, and a side port adjacent its closed forward end;
-
12. A vented needle with an externally longitudinally grooved cannula having a forward end and a rearward end and a hub connected to a rearward portion of the cannula, wherein the improvement comprises:
- a stop means on the needle for engaging a container closure prior to complete insertion of the groove into such container closure;
said stop means and cannula forming a unit that has a lateral gas vent means to an exterior of the stop means, thereby insuring that the groove is always exposed to the atmosphere. - View Dependent Claims (13)
- a stop means on the needle for engaging a container closure prior to complete insertion of the groove into such container closure;
Specification