Importance

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Abstract

A needle-less injector suitable for injecting liquid medication through a skin surface of a patient include a housing, a driver, a pop valve and a trigger. The housing containing the liquid medication and a gas storage chamber containing a gas. The driver that forces the medication out of the housing at a sufficient speed to pierce the skin surface of the patient. The pop valve is mounted in the housing to seal the gas in the housing. The resistance sensitive trigger is coupled to the pop valve and is used to release the pop valve, such that it pops open into the gas storage chamber of the housing, to release the gas to activate the driver to force the liquid medication out of the housing. The resistance sensitive trigger is activated upon application of a predetermined amount of pressure to the resistance sensitive trigger that is opposed by a predetermined amount of resistance from the skin surface of the patient. The predetermined amount of resistance results from the housing having contact with the skin surface of the patient, and when this predetermined amount of resistance is reached the liquid medication is forced out of the housing by the driver to pierce the skin surface of the patient.

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First Claim