Needleless hypodermic injection device

Details Needleless hypodermic injection device Needleless hypodermic injection device

1985-12-12

1987-07-14

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 530

Patent

active

046800271

ABSTRACT:
An improved system for injecting liquid medication into the tissues of a person without using a needle to penetrate the skin includes a power supply mechanism having a source of compressed gas which drives a piston against the plunger of a syringe. The syringe has an aperture which is placed against the skin of a person and through which the liquid medication is ejected with sufficient force to pass through the skin and into the underlying tissues. The syringe is provided with a removable needle assembly so that the syringe can be filled with liquid medication in a conventional manner. The system is constructed so that the needle assembly must be removed in order to insert the needle assembly into the power supply mechanism and is also constructed so that the power supply mechanism cannot be triggered to release the compressed gas unless a syringe is inserted in the power supply mechanism and properly secured.

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