Pyrotechnically powered needleless injector

Details Pyrotechnically powered needleless injector Pyrotechnically powered needleless injector

1976-10-07

1978-05-16

Michell, Robert W.

Surgery

Truss

Pad

128215, 128218A, A61M 530

Patent

active

040893340

ABSTRACT:
A pyrotechnically powered needleless injector for introducing predetermined quantities of medicaments interstitially through the skin. The injector includes a barrel formed to receive an ampul. An elongated disposable ampul, containing a quantity of a selected medicament and having an orifice at one end, a deflagatory gas-generating pyrotechnic charge at its other end, and a gas operated piston positioned between the charge and the medicament to eject the medicament through the orifice under high pressure upon detonation of the charge, is adapted to be inserted into and releasably secured in the barrel. The barrel is rotatably and slidably mounted to a housing containing a firing mechanism which is armed by relative motion of the barrel and housing. A triggering mechanism in the housing activates the firing mechanism to detonate the charge within the ampul.

REFERENCES:
patent: 2322245 (1943-06-01), Lockhart
patent: 2762369 (1956-09-01), Venditty
patent: 2762370 (1956-09-01), Venditty
patent: 3841328 (1974-10-01), Jensen

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