Syringe for sequential delivery of different fluids
First Claim
Patent Images
1. A syringe for sequentially administering different fluids comprising:
- a syringe body having a hollow interior for receiving the fluids to be administered;
a syringe needle mounted at one end of the syringe body for administering the fluids therefrom;
a plunger mounted within the interior of the syringe body for movement therein toward the end of the syringe body comprising the syringe needle to force fluids outwardly from the interior of the syringe body through the syringe needle;
the plunger further comprising a piston forming a fluid tight seal with the interior of the syringe body;
a floating piston slidably supported within the hollow interior of the syringe body and forming a fluid tight seal with the syringe body which divides the syringe body into a first portion for receiving the first fluid to be administered and a second portion for receiving the second fluid to be administered; and
the floating piston further comprising means for connecting the second fluid to be administered in fluid communication with the syringe needle after all of the first fluid to be administered has been discharged therethrough.
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Accused Products
Abstract
A syringe for sequentially administering different fluids includes a floating piston which separates the syringe into a first portion for receiving a first fluid to be administered and a second portion for receiving a second fluid to be administered. The floating piston includes a fluid tight seal which initially separates the first and second portions of the syringe and apparatus for connecting the second portion of the syringe to the syringe needle after the first fluid has been discharged from the syringe.
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Citations
34 Claims
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1. A syringe for sequentially administering different fluids comprising:
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a syringe body having a hollow interior for receiving the fluids to be administered;
a syringe needle mounted at one end of the syringe body for administering the fluids therefrom;
a plunger mounted within the interior of the syringe body for movement therein toward the end of the syringe body comprising the syringe needle to force fluids outwardly from the interior of the syringe body through the syringe needle;
the plunger further comprising a piston forming a fluid tight seal with the interior of the syringe body;
a floating piston slidably supported within the hollow interior of the syringe body and forming a fluid tight seal with the syringe body which divides the syringe body into a first portion for receiving the first fluid to be administered and a second portion for receiving the second fluid to be administered; and
the floating piston further comprising means for connecting the second fluid to be administered in fluid communication with the syringe needle after all of the first fluid to be administered has been discharged therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. For use in conjunction with a syringe of the type comprising a syringe body having a hollow interior, a hollow syringe needle mounted at one end of the syringe body and coupled in fluid communication with the interior thereof, and a plunger mounted for movement within the syringe body toward the syringe needle to force fluids contained within the syringe body outwardly through the syringe needle, the plunger further comprising a piston forming a fluid tight seal with the interior of the syringe body, a floating piston adapting the syringe for the sequential administration of different fluids comprising:
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means forming a fluid tight seal with the interior of the syringe body which divides the syringe body into a first portion for receiving a first fluid to be administered and a second portion for receiving a second fluid to be administered; and
means for connecting the second portion of the syringe body in fluid communication with the syringe needle after the first fluid to be administered has been discharged from the syringe body through the syringe needle under the action of the plunger. - View Dependent Claims (14)
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15. A syringe for sequentially administering different fluids comprising:
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a syringe body having a hollow interior for receiving the fluids to be administered;
a syringe needle mounted at one end of the syringe body for administering the fluids therefrom;
a plunger mounted within the interior of the syringe body for movement therein toward the end of the syringe body comprising the syringe needle to force fluids outwardly from the interior of the syringe body through the syringe needle;
the plunger further comprising a piston forming a fluid tight seal with the interior of the syringe body;
a floating piston slidably supported within the hollow interior of the syringe body and forming a fluid tight seal with the syringe body which divides the syringe body into a first portion for receiving the first fluid to be administered and a second portion for receiving the second fluid to be administered; and
the floating piston further comprising valve means for initially maintaining separation between the first and second fluids and for connecting the second fluid to be administered in fluid communication with the syringe needle after all of the first fluid to be administered has been discharged therethrough. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. For use in conjunction with a syringe of the type comprising a syringe body having a hollow interior, a hollow syringe needle mounted at one end of the syringe body and coupled in fluid communication with the interior thereof, and a plunger mounted for movement within the syringe body toward the syringe needle to force fluids contained within the syringe body outwardly through the syringe needle, the plunger further comprising a piston forming a fluid tight seal with the interior of the syringe body, a floating piston adapting the syringe for the sequential administration of different fluids comprising:
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resilient means forming a fluid tight seal with the interior of the syringe body which divides the syringe body into a first portion for receiving a first fluid to be administered and a second portion for receiving a second fluid to be administered; and
valve means for connecting the second portion of the syringe body in fluid communication with the syringe needle after the first fluid to be administered has been discharged from the syringe body through the syringe needle under the action of the plunger. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification