Injector for Viscous Materials
First Claim
Patent Images
1. An injector for viscous materials comprising a syringe body with a proximal end, a distal end with an outlet and a hollow bore between the ends;
- and a plunger disposed within the hollow bore coupled to a positive displacement mechanism that progressively advances the plunger toward the distal end of the syringe body to eject the material within the hollow bore through said outlet wherein said positive displacement mechanism comprises a series of spaced mechanical stops for controlling the linear displacement of said plunger.
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Accused Products
Abstract
An injector is provided to deliver microquantities of viscous materials into the body, such as the eye, for surgical purposes. The injector comprises a syringe body with a plunger disposed therein coupled to a positive displacement mechanism capable of progressively advancing the plunger to precisely deliver microquantities of materials at a constant or predetermined delivery rate.
87 Citations
29 Claims
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1. An injector for viscous materials comprising a syringe body with a proximal end, a distal end with an outlet and a hollow bore between the ends;
and a plunger disposed within the hollow bore coupled to a positive displacement mechanism that progressively advances the plunger toward the distal end of the syringe body to eject the material within the hollow bore through said outlet wherein said positive displacement mechanism comprises a series of spaced mechanical stops for controlling the linear displacement of said plunger. - View Dependent Claims (5, 6, 7, 8, 9, 11, 12)
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2-4. -4. (canceled)
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10. (canceled)
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13. A device for delivering microquantities of viscous materials comprising
an injector for viscous materials comprising a syringe body with a proximal end, a distal end with an outlet and a hollow bore between the ends; -
and a plunger disposed within the hollow bore coupled to a positive displacement mechanism that progressively advances the plunger toward the distal end of the syringe body to eject the material within the hollow bore through said outlet; and
a microcannula. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A kit for delivering microquantities of viscous materials comprising
an injector for viscous materials comprising a syringe body with a proximal end, a distal end with an outlet and a hollow bore between the ends; -
and a plunger disposed within the hollow bore coupled to a positive displacement mechanism that progressively advances the plunger toward the distal end of the syringe body to eject the material within the hollow bore through said outlet; and
a microcannula. - View Dependent Claims (27)
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28. A kit for delivering microquantities of viscous materials comprising
an injector for viscous materials comprising a syringe body with a proximal end, a distal end with an outlet and a hollow bore between the ends; -
and a plunger disposed within the hollow bore coupled to a positive displacement mechanism that progressively advances the plunger toward the distal end of the syringe body to eject the material within the hollow bore through said outlet; and
a prepackaged cartridge adapted to be accommodated within said injector, said cartridge containing said viscous materials.
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29. An injector for viscous materials comprising a syringe body with a proximal end, a distal end with an outlet and a hollow bore between the ends;
and a plunger disposed within the hollow bore coupled to a positive displacement mechanism that progressively advances the plunger toward the distal end of the syringe body to eject the material within the hollow bore through said outlet wherein said positive displacement mechanism comprises a threaded rod attached to said plunger having a thread pitch greater than or equal to 40 threads per inch.
Specification