Disposable needle-free injection apparatus and method
AssigneeBioject Medical Technologies Inc.
InventorSergio Landau
Life of this patent
Estimating the term…
Abstract
One form of the invention provides a needle-free injection system including the following components: a nozzle portion having a glass wall defining a drug storage space, and an injection wall defining a drug injection space, the injection wall being aligned with the glass wall and defining a plurality of drug bypass conduits disposed adjacent a forward end of the drug injection space; an injection orifice defined at the forward end of the injection space; a drug plunger defining a rearward end of the storage space; a portion of dried drug initially disposed between the storage space and the injection space, and being displaceable into the injection space adjacent the bypass conduits; and a pierceable gas cartridge for providing injection power to the drug plunger.
Claims24
A needle-free injection system comprising:
- a nozzle portion having a glass wall defining a drug storage space, and an injection wall defining a drug injection space, the injection wall being aligned with the glass wall;
- a body portion mounted to the nozzle portion such that relative axial movement may be effected between the portions;
- an injection orifice defined at the forward end of the injection space;
- a drug plunger defining rearward end of the storage space, with a plurality of drug bypass conduits defined between the forward end of the drug injection space and the drug plunger;
- a drug plug initially disposed between the storage space and the injection space, and being displaceable into the injection space adjacent the bypass conduits;
- and
- a pierceable gas cartridge for providing injection power to the drug plunger.
A needle-free injection system comprising:
- a nozzle portion having a glass wall defining a drug storage space, and an injection wall defining a drug injection space, the injection wall being aligned with the glass wall;
- an injection orifice defined at a forward end of the injection space;
- a drug plunger defining rearward end of the storage space;
- a pierceable gas cartridge for providing injection power to the system;
- a gas pressure rod positioned rearwardly of and coaxial with the drug plunger, the gas pressure rod defining an axially extending gas channel and at least one radially extending gas channel;
- and
- a seal disposed adjacent the gas pressure rod positioned to receive gas pressure when the gas cartridge has been pierced, the gas pressure exerting a forward force on the seal, the seal being slidable between positions rearward and forward of the radial gas channel, the seal sealing gas pressure from passing forwardly of the seal, such that when the seal is disposed forwardly of the radial gas channel gas pressure can pass through the radial channel and into the axial channel and be directed forwardly to drive the drug plunger forwardly.
A needle-free injection system comprising:
- a nozzle Portion having a glass wall defining a drug storage space, and an injection wall defining a drug injection space, the injection wall being aligned with the glass wall;
- a body portion mounted to the nozzle portion such that relative axial movement may be effected between the portions;
- an injection orifice defined at the forward end of the injection space;
- a drug plunger defining a rearward end of the storage space, with a plurality of drug bypass conduits defined between the forward end of the drug injection space and the drug plunger;
- a pierceable gas cartridge for providing injection power to the drug plunger.
Dependencies are inferred from the claim text.