Back to results
US 5,899,880 AGranted
Needleless syringe using supersonic gas flow for particle delivery
AssigneePowderject Research Limited
InventorsBrian J. Bellhouse, David F. Sarphie, John C. Greenford
Life of this patent
Estimating the term…
Abstract
A needleless syringe having a membrane which is ruptured by gas pressure to generate a supersonic gas flow in which particles containing a therapeutic agent are injected.
Claims28
A needleless syringe for delivering particles having a nominal particle size of at least about 10 .mu.m, said syringe comprising:
- an elongate tubular nozzle having upstream and downstream ends, and a divergent downstream section;
- means for positioning a source of particles at the upstream end of the tubular nozzle;
- and
- energizing means for releasing compressed gas through a source of particles positioned at the upstream end of the nozzle and into the nozzle to produce within the nozzle a gas flow with particles entrained therein, wherein said gas flow is capable of delivering said particles to a target surface at a velocity of 200 m/sec or greater.
1 more element
Dependencies are inferred from the claim text.