Adjustable dosage syringe
First Claim
1. A dosage syringe comprising:
- (a) a syringe barrel having a distal discharge end and a proximal plunger receiving end and wherein the internal length and diameter of the barrel define an internal reservoir having a sufficient volume to contain a desired dosage of a pharmaceutical composition;
(b) a plunger movably disposed within the barrel and having a length greater than the internal length of the barrel, and having;
(i) a proximal end configured to transfer an operator hand pressure to the plunger;
(ii) a distal end having a seal means disposed across the contents of the barrel thereby preventing the contents from leaking from the internal reservoir and transferring pressure from the plunger to the contents of the barrel for discharging the contents through the distal discharge end; and
(iii) a dose volume scale disposed along the longitudinal axis of the plunger and orientated such that the numeric value increases in a direction from the proximal end of the plunger;
(c) an adjustable dose selector disposed at the proximal plunger receiving end of the barrel and configured to engage the proximal end of the plunger when the plunger is depressed, wherein the dose selector cooperates with the dose volume scale of the plunger to indicate a desired dose of a pharmaceutical composition to be delivered by the syringe; and
(d) an indicator means disposed on the barrel to indicate on the dose volume scale the amount of the pharmaceutical composition in the internal reservoir;
1 Assignment
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Accused Products
Abstract
The present invention is directed to determining, without repeated calculation by an operator, the volume of a non-solid composition remaining in the barrel of a syringe after discharge of a dose of the composition. The present invention provides a syringe barrel, and a plunger having a dose volume scale disposed along the longitudinal axis and orientated such that the numeric values increase in the direction from the proximal end of the plunger towards the discharge end. The dosage syringe also comprises an adjustable dose selector that may be moved to a volume mark of the scale corresponding to a desired dose to be delivered. The dose syringe barrel further comprises an indicator means that may be an opening in the barrel directly above the dose volume scale such that, when the plunger is in a fully retracted position, the window shows the volume of the full capacity of the syringe barrel and when the plunger is depressed, will show the remaining volume in the syringe.
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Citations
17 Claims
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1. A dosage syringe comprising:
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(a) a syringe barrel having a distal discharge end and a proximal plunger receiving end and wherein the internal length and diameter of the barrel define an internal reservoir having a sufficient volume to contain a desired dosage of a pharmaceutical composition;
(b) a plunger movably disposed within the barrel and having a length greater than the internal length of the barrel, and having;
(i) a proximal end configured to transfer an operator hand pressure to the plunger;
(ii) a distal end having a seal means disposed across the contents of the barrel thereby preventing the contents from leaking from the internal reservoir and transferring pressure from the plunger to the contents of the barrel for discharging the contents through the distal discharge end; and
(iii) a dose volume scale disposed along the longitudinal axis of the plunger and orientated such that the numeric value increases in a direction from the proximal end of the plunger;
(c) an adjustable dose selector disposed at the proximal plunger receiving end of the barrel and configured to engage the proximal end of the plunger when the plunger is depressed, wherein the dose selector cooperates with the dose volume scale of the plunger to indicate a desired dose of a pharmaceutical composition to be delivered by the syringe; and
(d) an indicator means disposed on the barrel to indicate on the dose volume scale the amount of the pharmaceutical composition in the internal reservoir;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 15, 16, 17)
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9. A dosage syringe comprising:
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(a) a syringe barrel having a distal discharge end and a proximal plunger receiving end and wherein the internal length and diameter of the barrel define an internal reservoir having a sufficient volume to contain a desired dosage of a pharmaceutical composition;
(b) a plunger movably disposed within the barrel and having a length greater than the internal length of the barrel, and having;
(i) a proximal end configured to transfer an operator hand pressure to the plunger;
(ii) a distal end having a seal means disposed across the contents of the barrel to prevent the contents from leaking and to transfer the hand pressure to the contents of the barrel for discharging the contents through the distal discharge end; and
(iii) a dose volume scale disposed along the longitudinal axis of the plunger and orientated such that the numeric value increases in a direction from the proximal end of the plunger, wherein the dose volume scale is engraved, printed, attached along the longitudinal axis of the plunger, or is a linear strip attached by a proximal end to the proximal end of the plunger and the distal end of the strip is movable disposed along the longitudinal axis of the barrel of the syringe;
(c) an adjustable dose selector disposed at the proximal plunger receiving end of the barrel and configured to engage the proximal end of the plunger when the plunger is depressed, wherein the dose selector cooperates with the dose volume scale of the plunger to indicate a desired dose of a pharmaceutical composition to be delivered by the syringe;
(d) an indicator means disposed on the barrel to indicate on the dose volume scale the amount of the pharmaceutical composition in the internal reservoir;
(e) a gripping means for securing the syringe during operation;
(f) an extension to the proximal plunger receiving end of the barrel and having the adjustable dose selector disposed thereon; and
(g) at least one protuberance configured to limit the entry of the barrel into the mouth of an animal. - View Dependent Claims (10, 11)
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Specification