Mechanical syringe accessory
First Claim
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1. An accessory for a syringe comprising:
- a shaft including a spiral and a plurality of intermittent stops disposed along the spiral, wherein a distance between a first one of the intermittent stops and a second one of the intermittent stops is configured to define a dose increment, wherein the shaft has a first translational degree of freedom and does not have any rotational degree of freedom relative to a barrel of the syringe;
a rotating traveler having a second translational degree of freedom and a rotational degree of freedom relative to the barrel; and
a fixed ratchet including valleys configured to engage the rotating traveler,wherein the shaft is at least partially attached to a plunger of the syringe.
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Abstract
Described herein are syringe accessories that can be attached to standard syringes. These accessories utilize one or more mechanisms that can provide at least one additional sensory feedback to the user when performing an aliquot or dosed injection. In other embodiments, the accessories can prevent overdosing.
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Citations
18 Claims
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1. An accessory for a syringe comprising:
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a shaft including a spiral and a plurality of intermittent stops disposed along the spiral, wherein a distance between a first one of the intermittent stops and a second one of the intermittent stops is configured to define a dose increment, wherein the shaft has a first translational degree of freedom and does not have any rotational degree of freedom relative to a barrel of the syringe; a rotating traveler having a second translational degree of freedom and a rotational degree of freedom relative to the barrel; and a fixed ratchet including valleys configured to engage the rotating traveler, wherein the shaft is at least partially attached to a plunger of the syringe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An accessory for a syringe comprising:
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a shaft defining a longitudinal axis and having a plurality of stops, each of the stops being associated with a predetermined dose increment, the shaft being rotatably fixed about the longitudinal axis and translatable along the longitudinal axis relative to a barrel of the syringe to eject the predetermined dose increment; a ratchet component being translatably fixed along and rotatably fixed about the longitudinal axis, the ratchet component including a series of peaks and valleys extending circumferentially about the longitudinal axis; and a traveler component having a base portion and a spring-loaded interface portion coupled to the base portion, the base portion being translatably fixed along and rotatable about the longitudinal axis, the spring-loaded interface portion being engageable with the ratchet component in a first rotational position of the traveler component to restrict rotation of the traveler component about the longitudinal axis, the spring-loaded interface portion further being longitudinally compressible along the longitudinal axis in response to contact with and translation of the shaft during ejection of the predetermined dose increment, the spring-loaded interface portion being configured to urge rotation of the traveler component toward a second rotational position about the longitudinal axis during compression of the spring-loaded interface portion, the spring-loaded interface portion being configured to be fully compressed against a given stop of the shaft for limiting longitudinal translation of the shaft to permit ejection of only the predetermined dose increment, the spring-loaded interface portion being configured to rebound toward and engage with the ratchet component in the second rotational position to restrict further rotation of the traveler component relative to the ratchet component. - View Dependent Claims (12, 13, 14)
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15. A metered dose syringe comprising:
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a syringe barrel defining a longitudinal axis; a plunger shaft longitudinally movable within and rotatably fixed relative to the syringe barrel, the plunger shaft having a distal edge and a plurality of stops disposed along the distal edge for providing a predetermined dose increment; and a dosage feedback mechanism including a ratchet component and a traveler component, the ratchet component being translatably and rotatably fixed relative to the syringe barrel, the ratchet component including a series of peaks and valleys extending circumferentially about the longitudinal axis, the traveler component having a base portion and a spring-loaded interface portion coupled to the base portion, the base portion being translatably fixed relative to the syringe barrel and rotatable about the longitudinal axis, wherein the spring-loaded interface portion is engageable with the ratchet component to restrict rotation of the traveler component, the plunger shaft being depressible to (i) contact the distal edge thereof against the spring-loaded interface portion, (ii) cause rotation of the traveler component about the longitudinal axis, and (iii) fully compress the spring-loaded interface portion against a given stop of the plurality of stops of the distal edge for limiting longitudinal translation of the plunger shaft to permit ejection of only the predetermined dose increment. - View Dependent Claims (16, 17, 18)
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Specification