Fluid delivery device with filtration
View Patent ↗This disclosure relates to fluid delivery devices which include a body defining a fluid channel with filtration. In one embodiment, the body is molded to include a barrier which extends across the fluid channel and a series of apertures or openings are formed through the barrier. A laser device may be used to form the apertures through the barrier.
1. A method of forming a fluid delivery device comprising the following steps:
molding a body defining a fluid channel and having a barrier extending across the fluid channel, wherein the body defines a needle hub and includes a proximal end including a luer type connector and a distal end configured to support a needle cannula and wherein the barrier is initially molded integrally with the body; and
forming a plurality of apertures through the barrier to define a filtered opening to facilitate fluid flow through the fluid channel;
wherein the step of forming a plurality of apertures includes:
using a laser to form a series of apertures;
forming a series of first cavities having a first cross-sectional area and a depth less than a thickness of the barrier; and
forming at least one second cavity in each of the first cavities, wherein the at least one second cavity has a cross-sectional area less than the cross-sectional area of the first cavity.
2. The method according to claim 1 , wherein a depth of the first cavity and a depth of the at least one second cavity formed in the first cavity equals the thickness of the barrier.
3. The method according to claim 1 , wherein the first cavity and the at least one second cavity formed in the first cavity are formed simultaneously.
4. A method of forming a fluid delivery device comprising:
molding a body defining a fluid channel therein and having a barrier extending across the fluid channel, wherein the body defines a needle hub and includes a proximal end including a luer type connector and a distal end supporting a needle cannula and wherein the barrier is initially molded integrally with the body; and
forming a plurality of apertures through the barrier to define a filtered opening to facilitate fluid flow through the fluid channel, wherein the plurality of apertures has a count mesh size of from about 50 to about 200 mesh;
wherein forming a plurality of apertures includes: using a laser to form the plurality of apertures through the barrier;
forming a series of first cavities having a first cross-sectional area and a depth less than a thickness of the barrier; and
forming at least one second cavity in communication with each of the first cavities, wherein the at least one second cavity has a cross-sectional area less than the cross-sectional area of the first cavity.
5. The method according to claim 4 , wherein a depth of the first cavity and a depth of the at least one second cavity formed in communication with the first cavity equals the thickness of the barrier.
6. The method according to claim 4 , wherein the first cavity and the at least one second cavity formed in communication with the first cavity are formed simultaneously.