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US 11,992,669 B2Granted
Systems and methods related to syringes
OwnerAaron Hirschmann, Robert Fesusinventors
Life of this patent
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Abstract
An improved system and method for a syringe capable of reducing re-usage and limiting wasted contents. The syringe has a plunger with a plunger plug that extends beyond the barrel of the syringe when the contents are fully dispensed and prevents the plunger from being drawn backward. The plunger may also consist of a two-piece design that separates upon exceeding a predetermined force when attempting to draw the plunger backward after use.
Claims4
A syringe comprising:
- a barrel extending from an open proximal end to an open distal end, the barrel including a through-bore extending inward from the open proximal end and a channel extending inward from the open distal end, the through-bore and channel being in fluid communication, wherein the through-bore comprises a through-bore diameter and the channel comprises a channel diameter that is smaller than the through-bore diameter along a channel length;
- a plunger slidably received within the barrel through the open proximal end, the plunger comprising a pushrod coupled to a tip portion through a mating engagement;
- and
- a carriage disposed about and releasably engaged with the tip portion, wherein a force of engagement between the carriage and the tip portion maintains the carriage in a stationary position with respect to the tip portion as the pushrod is moved in a distal direction, and
- further wherein the carriage circumferentially physically contacts the barrel, and longitudinally contacts an end of the through-bore and additional pressure applied to the proximal end of the pushrod in the distal direction overcomes the force of engagement to allow the carriage to slide along the tip portion as the tip portion continues to move in the distal direction.
2 more elements
Dependencies are inferred from the claim text.