Needle-Free Injection Device
First Claim
1. A device for injecting a fluid dose into a body of a patient comprising:
- a needle-free injecting assembly constructed and arranged to deliver the fluid dose into the body;
a fluid delivery assembly configured to deliver the fluid dose to the needle-free injecting assembly, the fluid delivery assembly including;
a housing defining an interior space therein;
a cartridge defining a reservoir for containing the fluid, the cartridge constructed and arranged to be received by the interior space, the cartridge having a first end defining an outlet and a second end;
a movable piston contained within the second end of the cartridge;
a drive train for applying a force to the movable piston; and
a sensing assembly constructed and arranged to control at least the drive train; and
an adapter removably coupled to the needle-free injecting assembly and fluidly coupling the cartridge to the needle-free injecting assembly, the adapter having a fluid flow passage extending transverse to an axis extending along a length the needle-free injecting assembly;
wherein the sensing assembly directs the drive train to apply a force to the movable piston for preventing adhesion or static friction between the movable piston and the interior surface of the cartridge during delivery of the fluid from the cartridge to the needle-free injecting assembly.
4 Assignments
0 Petitions
Accused Products
Abstract
A fluid injecting device (30) generally including a fluid delivery assembly (32) and a needle-free injecting assembly (34). The fluid delivery assembly (32) delivers or transfers the fluid medicine from a cartridge (40) into the needle-free injecting assembly (34) for injecting into a patient. A drive train (112) applies a force to a piston (64) inside the cartridge (40) during the delivery of the fluid to the needle-free injecting assembly (34) to prevent adhesion or static friction between the piston (64) and the cartridge (40). In addition, sensors can be used to help ensure the proper amount of dosage is transferred to the needle-free injecting assembly, conserve power, reduce leakage during disassembly, among other functions.
127 Citations
24 Claims
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1. A device for injecting a fluid dose into a body of a patient comprising:
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a needle-free injecting assembly constructed and arranged to deliver the fluid dose into the body; a fluid delivery assembly configured to deliver the fluid dose to the needle-free injecting assembly, the fluid delivery assembly including; a housing defining an interior space therein; a cartridge defining a reservoir for containing the fluid, the cartridge constructed and arranged to be received by the interior space, the cartridge having a first end defining an outlet and a second end; a movable piston contained within the second end of the cartridge; a drive train for applying a force to the movable piston; and a sensing assembly constructed and arranged to control at least the drive train; and an adapter removably coupled to the needle-free injecting assembly and fluidly coupling the cartridge to the needle-free injecting assembly, the adapter having a fluid flow passage extending transverse to an axis extending along a length the needle-free injecting assembly; wherein the sensing assembly directs the drive train to apply a force to the movable piston for preventing adhesion or static friction between the movable piston and the interior surface of the cartridge during delivery of the fluid from the cartridge to the needle-free injecting assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A device for injecting a fluid dose into a body of a patient comprising:
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a needle-free injecting assembly constructed and arranged to deliver the fluid dose into the body; and a fluid delivery assembly configured to deliver the fluid dose to the injecting assembly, the fluid delivery assembly including; a cartridge defining a reservoir for containing the fluid, the cartridge having a first end defining an outlet and a second end, a movable piston contained within the second end of the cartridge, an adapter removably coupled to the injecting assembly and fluidly coupling the cartridge to the injecting assembly, and a powered drive train for applying a force to the movable piston for facilitating aspiration of the fluid from the cartridge to the coupled injecting assembly. - View Dependent Claims (22, 23)
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24. A device for injecting a fluid dose into a body of a patient comprising:
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a needle-free injecting assembly constructed and arranged to deliver the fluid dose into the body; and a fluid delivery assembly configured to deliver the fluid dose to the injecting assembly, the fluid delivery assembly including; a cartridge defining a reservoir for containing the fluid, the cartridge having a first end defining an outlet and a second end, a movable piston contained within the second end of the cartridge, an adapter removably coupled to the injecting assembly and fluidly coupling the cartridge to the injecting assembly, a powered drive train for applying a force to the movable piston, and a sensing assembly constructed and arranged to sense the force applied to the movable piston and the cartridge and to control at least the drive train to direct the drive train to apply the force to the movable piston for preventing the adhesion or static friction during delivery of the fluid from the cartridge to the injecting assembly.
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Specification