Needleless syringe with prefilled cartridge
First Claim
1. A cartridge and nozzle assembly for use in a needleless injection system, comprising:
- a cartridge having a plunger disposed at a rearward end thereof, and including a throat at a forward portion thereof, the cartridge further including a generally laterally extending interface surface;
a displaceable outlet valve initially disposed within the cartridge throat, the outlet valve being formed of resilient material;
a nozzle for receiving the cartridge, the nozzle defining a rearward, cartridge-receiving portion, and including a forward portion terminating in and defining a valve abutment surface with an injection orifice defined therein, the forward portion being configured to receive the valve when the valve is displaced to a forwardly disposed position such that the valve is disposed against the valve abutment surface, with a plurality of channels providing fluid access between the cartridge throat and the injection orifice when the valve is in its forwardly disposed position, the nozzle further including a generally laterally extending interface surface which abuts the cartridge interface surface; and
a seal disposed between the cartridge and the nozzle rearward of the interface surfaces for at least reducing leakage of injectate therebetween.
6 Assignments
0 Petitions
Accused Products
Abstract
A cartridge and nozzle assembly for use in a needless injection system is provided. The assembly includes: (1) a cartridge having a plunger disposed at a rearward end thereof, and including a throat at a forward portion thereof, with a displaceable outlet valve initially disposed within the throat, the outlet valve being formed of resilient material and having at least one axial channel defined in the forward and rearward portions thereof, between which is disposed a channel-less valve body; (2) a nozzle for receiving the cartridge, the nozzle defining a rearward, cartridge-receiving portion, and including a forward portion terminating in and defining a valve abutment surface with an injection orifice defined therein and a recessed portion, the recessed portion being configured to receive the valve when the valve is displaced to a forwardly disposed position such that the valve is disposed against the valve abutment surface, and so that the inner portion of the cartridge has fluid access to the orifice via the axial channels and around the valve body; and (3) a seal disposed between the cartridge and the nozzle adjacent the forward portions thereof for at least reducing leakage of injectate therebetween.
137 Citations
17 Claims
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1. A cartridge and nozzle assembly for use in a needleless injection system, comprising:
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a cartridge having a plunger disposed at a rearward end thereof, and including a throat at a forward portion thereof, the cartridge further including a generally laterally extending interface surface; a displaceable outlet valve initially disposed within the cartridge throat, the outlet valve being formed of resilient material; a nozzle for receiving the cartridge, the nozzle defining a rearward, cartridge-receiving portion, and including a forward portion terminating in and defining a valve abutment surface with an injection orifice defined therein, the forward portion being configured to receive the valve when the valve is displaced to a forwardly disposed position such that the valve is disposed against the valve abutment surface, with a plurality of channels providing fluid access between the cartridge throat and the injection orifice when the valve is in its forwardly disposed position, the nozzle further including a generally laterally extending interface surface which abuts the cartridge interface surface; and a seal disposed between the cartridge and the nozzle rearward of the interface surfaces for at least reducing leakage of injectate therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of providing a needleless injection system, comprising:
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selecting a resilient valve member; selecting a cartridge having laterally facing side walls, a forward throat conforming to the body of the valve; placing the valve within the cartridge throat; filling the cartridge with liquid injectate; installing a plunger in the rear end of the cartridge; selecting a nozzle with laterally facing side walls, a rearward cartridge-receiving portion and a forward portion defining a recess for non-sealably receiving the valve such that a plurality of channels are defined between the valve and the nozzle, the nozzle further including an orifice for facilitating injection of injectate therethrough; selecting a cartridge/nozzle seal member; installing the cartridge into the nozzle to form a cartridge/nozzle assembly, with the seal member disposed between the side walls of the cartridge and nozzle; and mounting the cartridge/nozzle assembly into a needleless injection system by pushing the plunger rearwardly against a ram to forwardly displace the plunger, causing pressure of injectate within the cartridge to forwardly displace the valve into the nozzle recess to permit injectate to flow through the channels, and into the orifice. - View Dependent Claims (16, 17)
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Specification