Adjustable penetration depth syringe
AssigneeBecton, Dickinson and Company
InventorsAmit LIMAYE, Sudarsan SRINIVASAN, Todd ANDREONI, Edward J. ROSEN, Howard GOLD
Life of this patent
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Abstract
A syringe is provided with an assembly received on the distal end for adjusting the penetration depth. In embodiments, the assembly includes a collar attached to the syringe hub which moves with respect to the needle between axial positions depending on the desired needle penetration depth. The adjustable penetration depth syringe is useful in the context of self-administered drugs such as insulin, where a longer length needle is needed to fill a syringe from a vial, but a shorter penetration depth is preferred for administering a subcutaneous injection.
Claims18
A syringe with adjustable penetration depth, comprising:
- a tubular syringe barrel;
- a plunger positioned within the syringe barrel;
- a hub bearing a needle and attached to the syringe barrel;
- a movable collar having an open proximal end received over the hub, a distal end wall having an opening through which the needle protrudes, and a sidewall extending proximally from the distal end wall, the sidewall having an interior surface engaging the hub or syringe barrel;
- and
- a retaining feature on the collar engaging the hub or barrel and retaining the collar at a plurality of axial positions;
- wherein
- the collar travels with respect to the hub along a path defined by features on the interior surface of the sidewall engaging the hub or barrel, exposing a greater length of the needle as the collar travels toward the plunger;
- and wherein
- the collar is retained in a fixed position at said first and second axial positions.
A syringe with adjustable penetration depth, comprising:
- a tubular syringe barrel;
- a plunger positioned within the syringe barrel;
- a hub attached to the syringe barrel bearing a needle and having a plurality of laterally extending protrusions defining a plurality of slots at distinct axial positions on the hub;
- a movable collar having an open proximal end, a distal end wall having an opening through which the needle protrudes, and a sidewall extending proximally from the distal end wall;
- the interior surface of the sidewall having a tab adapted to engage one of the plurality of slots on the hub when the collar is rotated;
- wherein
- engagement of the collar and the hub fixes the axial position of the collar so that a predetermined length of the needle protrudes from the distal end wall of the collar at each axial position.
A syringe with adjustable penetration depth, comprising:
- a tubular syringe barrel;
- a plunger positioned within the syringe barrel;
- a hub bearing a needle attached to the syringe barrel;
- a tubular adapter attached to the distal end of the syringe barrel;
- and
- a tubular sleeve received around the adapter engaged with the adapter at a plurality of fixed positions, exposing a different length of needle beyond the distal end of the sleeve at each one of said plurality of fixed positions.
Dependencies are inferred from the claim text.