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AssigneeBioject, Inc.
InventorsSteven F. Peterson, Charles N. McKinnon, Jr., Paul E. Smith, Takaaki Nakagawa, Victor L. Bartholomew
Estimating the term…
A needleless injection device includes an initiator valve controlling flow of compressed gas into a reservoir. A poppet valve connecting to the reservoir has a gas pressure regulation end to regulate flow from the initiator valve into the reservoir. A clamp piston is driven forward by gas pressure from the reservoir and causes jaws to clamp onto a plunger extending into an ampule. The poppet valve opens when reservoir pressure reaches the cracking pressure of the poppet valve. Gas from the reservoir rushes through the poppet valve into a drive chamber and forces a drive piston, containing the clamp piston and jaws, forward causing the plunger to slide into the ampule. A jet of injectant is discharged from the nozzle of the ampule and penetrates through the patient's skin. An improved method of needleless injection uses a specific pressure profile, ampule nozzle diameter, patient, injection site, and injectant parameters.
A method of providing a jet injection by pressurizing a fluid injectant within an ampule having a nozzle, comprising the steps of:
A method of providing a jet injection by pressurizing a fluid injectant within an ampule having a nozzle, comprising the steps of:
A method of needleless injection comprising the steps of:
A method of jet injection comprising the steps of:
Method of jet injection comprising the steps of:
A method of jet injection comprising the steps of:
A method of jet injection comprising the steps of:
A method of jet injection comprising the steps of:
Dependencies are inferred from the claim text.