Needleless hypodermic injection device

Details Needleless hypodermic injection device Needleless hypodermic injection device

1989-11-09

1991-11-12

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 72, 604143, A61M 530

Patent

active

050644130

ABSTRACT:
A needleless injection device has a housing containing a pilot valve connectable to a compressed gas source. A main valve is operatively connected to the pilot valve. The pilot valve and main valve form a two-stage valve with the pilot valve activatable to open the main valve utilizing gas pressure. Compressed gas in a reservoir flows through the open main valve to driven a plunger into an ampule to inject an injectant through a patient's skin.

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