Spring launched needle safety clip

A safety hypodermic needle assembly comprising a needle hub, a pressure fitting, a resilient member, and a pressure trigger;

• the needle hub further comprising an internal needle assembly having a needle fixedly secured thereto and a stop member;
• the pressure fitting further comprises two elongated arms, two tapered ramps, a distal end having an opening, and a pair of cut-outs or a pair of male detents;
• wherein the pair of male detents or the pair of cut-outs are configured to engage the stop member;
• wherein the pressure trigger is configured to interact with the tapered ramps, and
• wherein the elongated arms are configured to spread radially as a result of the interaction between the pressure trigger and the tapered ramps.

A method for launching a needle tip safety guard assembly, said method comprising the steps:

• providing a safety hypodermic needle assembly and a syringe, the hypodermic needle assembly comprising a needle hub having an inner needle assembly, a needle, a pressure trigger, a pressure fitting, a spring clip, and a resilient member disposed in between the pressure fitting and the inner needle assembly, and the syringe comprising a plunger;
• inserting the needle into a patient;
• and
• pushing the plunger in a distal direction and causing a portion of the pressure trigger to ride up against the pressure fitting;
• wherein the pressure fitting comprises an elongated arm and a tapered ramp disposed on the elongated arm;
• and
• wherein the pressure trigger is configured to impart a pair of component forces on the tapered ramp to radially move the elongated arm when the plunger is pushed.

A method for launching a needle tip safety guard assembly, said method comprising the steps:

• providing a safety hypodermic needle assembly and a syringe, the hypodermic needle assembly comprising a needle hub, a needle, a pressure trigger, a pressure fitting, a spring clip, and a resilient member disposed in between the pressure fitting and the needle hub, and the syringe comprising a plunger;
• inserting the needle into a patient;
• and
• pushing the plunger in a distal direction and causing a portion of the pressure trigger to ride up against the pressure fitting;
• wherein the pressure fitting comprises an elongated arm and a tapered ramp disposed on the elongated arm;
• and
• wherein the resilient member is caused to compress by engaging the pressure fitting with an enlarged portion formed within the needle hub.

A safety hypodermic needle assembly comprising:

• a needle hub having an inner needle assembly, a proximal end and a distal end, the proximal end comprising a threaded member and a syringe tip receiving chamber, and the distal end comprising an opening for launching a spring clip;
• a resilient member for launching the spring clip to a blocking position;
• a pressure trigger having a fluid path, an opening, and a pusher end, wherein the opening is configured to receive a portion of the inner needle assembly;
• a pressure fitting having an elongated arm and a tapered ramp disposed on the elongated arm, the pressure fitting is configured to compress the resilient member when the needle assembly is in a ready position by cooperating the inner needle assembly;
• a needle secured to the inner needle assembly and having a needle tip and a needle stop;
• and
• wherein the spring clip is caused to block the needle tip by distally moving the pressure trigger so that it interacts with the pressure fitting.

A safety hypodermic needle assembly comprising a needle hub having a bore, an inner needle assembly attached to the bore of the needle hub, a washer, a spring clip, and a resilient member disposed between the washer and the spring clip;

• a pressure trigger having a trigger bore, a pair of elongated arms, a proximal syringe engagement arm, and a distal needle engagement arm for engaging with a needle;
• a pair of passages located adjacent the inner needle assembly;
• and
• wherein the elongated arms pass through the pair of passages to contact the washer.

A safety hypodermic needle assembly comprising a needle hub having a bore, an inner needle assembly attached to the bore of the needle hub, a spring clip, and a resilient member disposed between the inner needle assembly and the spring clip;

• a pressure trigger having a trigger bore, a pair of elongated arms, a proximal syringe engagement arm, and a distal needle engagement arm for engaging with a needle;
• a pair of passages located adjacent the inner needle assembly;
• and
• wherein the elongated arms pass through the pair of passages to contact the spring clip, which is positioned at the needle hub's distal end.

A safety hypodermic needle assembly comprising:

• a needle hub having a proximal end and a distal end comprising an integrally molded inner cylinder and a longer outer cylinder relative to the inner cylinder;
• the inner and outer cylinders defining an annular space thereinbetween and the outer cylinder comprising a groove;
• an inner needle assembly molded to the inner cylinder and comprising a bore;
• a passage located adjacent the inner needle assembly for allowing a pressure trigger to communicate with a pressure fitting;
• a needle having a needle tip and a change in profile secured to the bore of inner needle assembly;
• a resilient member disposed within the annular space for launching a spring clip, which is located distal of the resilient member;
• and
• wherein the pressure trigger comprises a fluid communication path and an elongated arm for extending through the passage.

A safety hypodermic needle assembly comprising a needle hub having a proximal end and a distal end, a needle secured to the needle hub and extending out from the needle hub distal end, and a syringe removably engaged to the proximal end of the needle hub;

• the syringe comprising:
• a barrel having a proximal end and a distal end and which defines a cylindrical bore;
• a plunger positioned within the cylindrical bore and having a distal end which has an extension pin and a plunger tip;
• wherein the distal end of the plunger further comprises a primary pusher end spaced apart from a secondary pusher end;
• and
• wherein the secondary pusher end is configured to move a distance relative to the primary pusher end and abut the primary pusher end upon a force applied to the plunger that is greater than a force necessary to move the plunger from a first position to a second position.

A syringe for injecting fluids and having two distinct advancing mechanisms comprising:

• a barrel having a proximal end and a distal end, a syringe tip located on the distal end, and an enclosed end having a bore for passing fluids;
• a plunger having a proximal end and a distal end, an extension pin extending from the distal end, and a plunger tip disposed on the distal end and having the extension pin passing therethrough;
• wherein the plunger is configured to move from a first position to a second position in which the plunger tip contacts the enclosed end of the barrel by application of a first distally force;
• and
• wherein the plunger is configured to move to a third position relative to the plunger tip by application of a second distally force, which is greater than the first distally force.

A safety hypodermic needle assembly comprising a needle hub having an outer cylinder and an inner cylinder and an annular space defined thereinbetween, the needle hub further comprising a proximal end having a fitting and a distal end;

• an inner needle assembly comprising a triggering portion and a needle retaining portion;
• the needle retaining portion having a needle extending distally therefrom and the triggering portion comprising an interior surface and an exterior surface;
• the interior surface defining an annular space and comprising a first interior bump, the exterior surface comprising a male detent and a first exterior bump;
• a pressure fitting comprising a flange, the flange further comprising a cylinder extending distally therefrom and an elongated arm extending proximally therefrom;
• the elongated arm further comprising a hook for engaging with the male detent located on the inner needle assembly,
• a resilient member compressed within the annular space when the hook is engaged with the male detent;
• and
• a pressure trigger, the pressure trigger comprises a cylindrical portion and a bore located therein, the pressure trigger is configured to engage with and radially expand the first interior bump located on the interior surface.

A method for advancing a plunger in a barrel of a syringe relative to a plunger tip;

• the plunger tip and the plunger being capable of both moving in unison and relative to one another, the method comprising the steps:
• aspirating a compressible fluid into the barrel through a distal opening of the barrel;
• attaching a needle hub comprising a needle to the syringe;
• puncturing a sealed vial with the needle, the sealed vial comprising a liquid;
• injecting the compressible fluid into the sealed vial;
• aspirating the liquid from the sealed vial into the syringe;
• removing the needle from the sealed vial;
• and
• sticking a patient with the needle and injecting the liquid into the patient.

A syringe for injecting fluids having different advancing mechanisms for compressible fluids and incompressible fluids comprising:

• a barrel having a proximal end and a distal end and a syringe tip located on the distal end having a bore for passing fluids;
• a plunger having a proximal end, a distal end, an extension pin extending from the distal end;
• and a plunger tip disposed on the distal end and having the extension pin passing therethrough;
• wherein the plunger tip is configured to remain substantially fixed to the plunger when a compressible fluid is being injected;
• and
• wherein the plunger moves distally relative to the plunger tip when an incompressible fluid is being injected.