Fluid transfer device or set with retractable needle and septum

A sealed retractable needle assembly, comprising:

• a needle assembly comprised of a needle hub and a needle securely coupled to the needle hub;
• a resiliently deflectable actuator arm extending from the needle hub and having an actuator button formed thereon;
• a barrel having proximal and distal ends and a passage extending therebetween, wherein the needle assembly is slidably disposed within the passage such that the needle assembly and the resiliently deflectable actuator arm are axially movable relative to the barrel from a distal position where the needle projects distally beyond the distal end of the barrel and a proximal position where the needle is entirely contained within the barrel, and wherein the barrel defines an aperture extending therethrough, which aperture engages the actuator button when the needle hub is in the distal position and the actuator button disengages the aperture when the resiliently deflectable actuator arm is resiliently deflected;
• a spring disposed in the barrel for propelling the needle assembly to the proximal position when the resiliently deflectable actuator arm is deflected and the actuator button disengages the aperture;
• a septum fitted within the distal end of the barrel, wherein the needle extends through the septum when the needle is in the distal position, and wherein the septum seals the barrel when the needle is in the proximal position;
• and
• an annular sleeve rotatably disposed about a circumference of the proximal end of the barrel, wherein the annular sleeve is selectively rotatable between a first position and a second position, and wherein the annular sleeve comprises a cover and a slot, wherein the cover obscures the aperture and the actuator button when the annular sleeve is in the first position, and wherein the aperture and the actuator button are accessible through the slot when the annular sleeve is in the second position.

A scaled retractable needle assembly, comprising:

• a needle assembly comprised of a needle hub and a needle securely coupled to the needle hub;
• a resiliently deflectable actuator arm extending from the needle hub and having an actuator button formed thereon;
• a barrel having proximal and distal ends and a passage extending therebetween, wherein the needle assembly is slidably disposed within the passage such that the needle assembly and the resiliently deflectable actuator arm are axially movable relative to the barrel from a distal position where the needle projects distally beyond the distal end of the barrel and a proximal position where the needle is entirely contained within the barrel, and wherein the barrel defines an aperture extending therethrough, which aperture engages the actuator button when the needle hub is in the distal position and the actuator button disengages the aperture when the resiliently deflectable actuator arm is resiliently deflected;
• a spring disposed in the barrel for propelling the needle assembly to the proximal position when the resiliently deflectable actuator arm is deflected and the actuator button disengages the aperture;
• a septum fitted within the distal end of the barrel, wherein the needle extends through the septum when the needle is in the distal position, and wherein the septum seals the barrel when the needle is in the proximal position;
• and an annular sleeve rotatably disposed about a circumference of the proximal end of the barrel, wherein the annular sleeve is selectively rotatable between a first position and a second position, and wherein the annular sleeve comprises a cover and a slot, wherein the sleeve prevents the needle assembly from being inadvertently propelled into the proximal position when the sleeve is in the first position, and wherein the sleeve must be rotated to the second position before the resiliently deflectable actuator arm can be deflected such that the actuator button disengages the aperture and the needle assembly is propelled under the spring force into the proximal position.