Nozzle assembly having a frangible plunger
First Claim
1. A nozzle assembly adapted for use with an injector device comprising:
- a chamber for holding a fluid and having first and second ends with an orifice at the first end for passage of the fluid and being open at the second end; and
a plunger slidingly received in said chamber for expelling fluid out of or drawing fluid into the chamber by moving the plunger relative to the chamber, the plunger comprising first and second driving members which include respective end and base portions retained in spaced relation by a frangible connection therebetween, with the second driving member being spaced apart from the first driving member by a gap, such that when a force sufficient to break the frangible connection is applied to the second driving member in a direction toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member for urging the first driving member towards the chamber orifice to expel fluid therefrom, and when the second driving member is thereafter moved away from the first driving member, the first driving member remains in the chamber to prevent reuse of the nozzle assembly.
2 Assignments
0 Petitions
Accused Products
Abstract
A nozzle assembly adapted for an injector, includes a frangible plunger. The plunger has a first driving member and a second driving member connected to the first driving member and spaced apart therefrom by a predetermined gap using a frangible bridge. When a predetermined force is applied to the second driving member, it breaks the frangible bridge and moves the second driving member across the gap. This causes the second driving member to ram into the first driving member driving fluid out of the nozzle. Thereafter, as the second driving member is separated from the first driving member, the first driving member remains stuck in the chamber preventing reuse of the nozzle assembly.
214 Citations
20 Claims
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1. A nozzle assembly adapted for use with an injector device comprising:
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a chamber for holding a fluid and having first and second ends with an orifice at the first end for passage of the fluid and being open at the second end; and a plunger slidingly received in said chamber for expelling fluid out of or drawing fluid into the chamber by moving the plunger relative to the chamber, the plunger comprising first and second driving members which include respective end and base portions retained in spaced relation by a frangible connection therebetween, with the second driving member being spaced apart from the first driving member by a gap, such that when a force sufficient to break the frangible connection is applied to the second driving member in a direction toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member for urging the first driving member towards the chamber orifice to expel fluid therefrom, and when the second driving member is thereafter moved away from the first driving member, the first driving member remains in the chamber to prevent reuse of the nozzle assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A nozzle assembly adapted for use with an injector device comprising:
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a chamber for holding a fluid and having first and second ends with an orifice at the first end for passage of the fluid and being open at the second end; and a plunger slidingly received in said chamber for expelling fluid out of or drawing fluid into the chamber by moving the plunger relative to the chamber, the plunger comprising first and second driving members and a frangible connection therebetween, with the second driving member being spaced apart from the first driving member by a gap, such that when a force sufficient to break the frangible connection is applied to the second driving member in a direction toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member for urging the first driving member towards the chamber orifice to expel fluid therefrom, and when the second driving member is thereafter moved away from the first driving member, the first driving member remains in the chamber to prevent reuse of the nozzle assembly, wherein the chamber includes external ridges or threads for connection to an injection device.
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11. A nozzle assembly adapted for use with an injector device comprising:
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a chamber for holding a fluid and having first and second ends with an orifice at the first end for passage of the fluid and being open at the second end; and a plunger slidingly received in said chamber for expelling fluid out of or drawing fluid into the chamber by moving the plunger relative to the chamber, the plunger comprising first and second driving members which include respective end and base portions retained in spaced relation by a frangible connection therebetween, with the second driving member being spaced apart from the first driving member by a gap, such that when a force sufficient to break the frangible connection is applied to the plunger, the frangible connection is broken and the second driving member moves across said gap toward the first driving member with the end portion of the second driving member contacting the base portion of the first driving member as the end portion of the first driving member is contacted by the base portion of the second driving member for urging the first driving member towards the chamber orifice to expel fluid therefrom. - View Dependent Claims (12, 13, 14, 15, 16, 17, 20)
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18. A nozzle assembly adapted for use with an injector device comprising:
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a chamber for holding a fluid and having first and second ends with an orifice at the first end for passage of the fluid and being open at the second end; and a plunger slidingly received in said chamber for expelling fluid out of or drawing fluid into the chamber by moving the plunger relative to the chamber, the plunger comprising first and second driving members and a frangible connection therebetween, with the second driving member being spaced apart from the first driving member by a gap, such that when a force sufficient to break the frangible connection is applied to the plunger, the frangible connection is broken and the second driving member moves across said gap toward the first driving member for urging the first driving member towards the chamber orifice to expel fluid therefrom, wherein the first and second driving members are cylindrical and have substantially D-shaped end portions which face each other and are joined by the frangible connection. - View Dependent Claims (19)
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Specification