# US 2019/0167896 A1 · Fluid transfer device or set with retractable needle and septum

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- Number: US 2019/0167896 A1
- Document ID: US20190167896A1
- Status: Published application
- Kind: A1
- Application number: 16/269,323
- Filed: 2019-02-06
- Published: 2019-06-06
- Earliest claimed: 2014-07-08
- Assignees: Becton, Dickinson and Company
- Applicants: Becton, Dickinson and Company
- Inventors: S. Ray Isaacson; Ralph L. Sonderegger, SR.
- Web page: https://patentgrep.com/patent/US20190167896A1

## CPC

- A61M 5/1626: {Needle protectors therefor (in combination with syringes A61M5/3202; protectors for sharps A61B50/3001)}
- A61M 5/158: Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body}
- A61M 25/0631: {having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle}
- A61M 39/04: having pierceable self-sealing members
- A61M 25/0637: {Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin}
- A61M 2005/1585: {Needle inserters}
- A61M 2039/042: {Shrouds encircling the access needle preventing accidental needle-stick}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A sealed fluid transfer device comprised of tubing, a proximal fitting, and a distal needle assembly is provided. The needle assembly includes a needle hub secured to a needle cannula. A cantilevered actuator arm extends outwardly from the needle hub having an actuator button at its free end. The needle assembly is disposed in a barrel and can move from a distal position, where the needle is exposed, to a proximal position, where the needle is shielded. The barrel includes a septum which seals the barrel. A spring is disposed in the barrel for propelling the needle assembly to the proximal position. The barrel includes an aperture that receives the actuator button for locking the spring in a compressed condition. Depression of the actuator button enables the spring to propel the needle assembly into its proximal position. A safety mechanism prevents inadvertent depression of the actuator button.

## Claims

### Claim 1

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 and the needle assembly and the 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 actuator arm is resiliently deflected;
a spring disposed in the barrel for propelling the needle assembly to the proximal position when the actuator arm is deflected and the actuator button disengages the aperture; and
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;
an absorbent sponge fitted in proximity to the septum within the distal end of the barrel, wherein the needle extends through the sponge when the needle is in the distal position, and wherein the sponge absorbs and retains any fluid on the outside of the needle as the needle is retracted into the proximal position; and
an annular sleeve rotatably disposed about a circumference of the proximal end of the barrel,
wherein the sleeve is selectively rotatable between a first position and a second position, and
wherein the sleeve comprises a cover and a slot.

### Claim 2 (depends on 1)

The sealed retractable needle assembly of claim 1, wherein the slot extends 180° around the circumference of the sleeve.

### Claim 3 (depends on 2)

The sealed retractable needle assembly of claim 2, wherein the cover obscures the aperture and the actuator button when the sleeve is in the first position, and wherein the aperture and the actuator button are accessible through the slot when the sleeve is in the second position.

### Claim 4 (depends on 2)

The sealed retractable needle assembly of claim 2, 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 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.

### Claim 5

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 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 actuator arm is resiliently deflected;
a spring disposed in the barrel for propelling the needle assembly to the proximal position when the 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 sleeve is selectively rotatable between a first position and a second position, and wherein the sleeve comprises a cover and a slot.

### Claim 6 (depends on 5)

The sealed retractable needle assembly of claim 5, further comprising an absorbent sponge fitted proximally of the septum within the distal end of the barrel, wherein the needle extends through the sponge when the needle is in the distal position, and wherein the sponge absorbs and retains any fluid on the outside of the needle as the needle is retracted into the proximal position.

### Claim 7 (depends on 6)

The sealed retractable needle assembly of claim 6, further comprising at least one resiliently deflectable locking finger extending from the barrel, wherein the at least one locking is configured to lockingly engage the needle hub when the needle hub reaches the proximal position.

### Claim 8 (depends on 7)

The sealed retractable needle assembly of claim 7, wherein the cover obscures the aperture and the actuator button when the sleeve is in the first position, and wherein the aperture and the actuator button are accessible through the slot when the sleeve is in the second position.

### Claim 9 (depends on 7)

The sealed retractable needle assembly of claim 7, 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 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.