Device for needleless hypodermic injection of medications
First Claim
1. A device for needleless hypodermic injection of medications by means of and injection an ampoule (11) pistol means (14) and, the ampoule including a front plate (1) having openings (2, 8) therethrough and a flexible membrane (3, 6), the ampoule forming a receptacle (4) having a cavity between the membrane and front plate, and the ampoule having a liquid medication in the cavity, the ampoule being mounted in the front end of the injection pistol with its membrane extended into the pistol means, the pistol means having a spring loaded punch (15) driven abruptly forwardly in response to which the punch engages the membrane and drives the medication through the openings,wherein,the front plate (1) of the ampoule (11) extends across and covers the front end of the pistol means (14), the device being applied to the skin of a patient by applying the front plate to the skin at an injection location, the openings (2, 8, 13) are formed in flat, tuncated cones arranged in circular formation on the front surface of the front plate.
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Abstract
An ampoule is provided with openings and a flexible membrane, forming a cavity, in which medication is stored in liquid form. The membrane is extended into the front end of an injection pistol which has a spring loaded punch which upon release, empties the ampoule through the openings. The ampoule has a flat front plate which covers the front end of the injection pistol. The openings of the ampoule are formed as nozzles in short truncated cones arranged in circular fashion on the front plate.
58 Citations
11 Claims
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1. A device for needleless hypodermic injection of medications by means of and injection an ampoule (11) pistol means (14) and, the ampoule including a front plate (1) having openings (2, 8) therethrough and a flexible membrane (3, 6), the ampoule forming a receptacle (4) having a cavity between the membrane and front plate, and the ampoule having a liquid medication in the cavity, the ampoule being mounted in the front end of the injection pistol with its membrane extended into the pistol means, the pistol means having a spring loaded punch (15) driven abruptly forwardly in response to which the punch engages the membrane and drives the medication through the openings,
wherein, the front plate (1) of the ampoule (11) extends across and covers the front end of the pistol means (14), the device being applied to the skin of a patient by applying the front plate to the skin at an injection location, the openings (2, 8, 13) are formed in flat, tuncated cones arranged in circular formation on the front surface of the front plate.
Specification