Hypodermic injection system
First Claim
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1. A hypodermic injection system for injecting liquids, which comprises:
- (a) a medication unit configured and dimensioned to store a volume of liquid to be injected, the medication unit having first region and a second region that are in liquid communication with each other, the first region being deformable and the second region having at least one orifice;
(b) an explosion chamber configured and dimensioned so that the medication unit is located at least partially within the explosion chamber and so that pressure generated within the explosion chamber would cause the first region of the medication unit to deform so as to reduce the volume within the medication unit, the explosion chamber further having a gas port for exhausting gas from the explosion chamber;
(c) an activatable gas generator located inside the explosion chamber, the gas generator being capable of generating a pressure within the explosion chamber when activated;
(d) an activation unit for activating the gas generator; and
(e) a free volume chamber having a variable volume, the free volume chamber being in fluid communication with the explosion chamber via the gas port.
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Abstract
A hypodermic injection system allows for the generation of a high pressure liquid jet capable of passing through the skin. The system uses two regions, the first region being flexible or squeezable and the second region having at least one exiting orifice through which the liquid jet can be expelled. The flexible region can be deformed by a pressure change in the surrounding container generated by an activatable gas generator that generates pressure within the first region that causes the liquid to be expelled.
163 Citations
35 Claims
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1. A hypodermic injection system for injecting liquids, which comprises:
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(a) a medication unit configured and dimensioned to store a volume of liquid to be injected, the medication unit having first region and a second region that are in liquid communication with each other, the first region being deformable and the second region having at least one orifice;
(b) an explosion chamber configured and dimensioned so that the medication unit is located at least partially within the explosion chamber and so that pressure generated within the explosion chamber would cause the first region of the medication unit to deform so as to reduce the volume within the medication unit, the explosion chamber further having a gas port for exhausting gas from the explosion chamber;
(c) an activatable gas generator located inside the explosion chamber, the gas generator being capable of generating a pressure within the explosion chamber when activated;
(d) an activation unit for activating the gas generator; and
(e) a free volume chamber having a variable volume, the free volume chamber being in fluid communication with the explosion chamber via the gas port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A handling unit for use in a hypodermic injection system, which comprises:
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(a) a first shell having an explosion chamber and an explosive therein;
(b) a second shell having a piercing needle disposed therein, the piercing needle having a piercing end;
(c) a medication unit having a concave portion, the medication unit being sandwiched between the first shell and the second shell, the concave portion being arranged adjacent to the piercing end of the needle so that when pressure is applied to the medication unit by an explosion in the first shell, the medication unit generates a flexing deformation of its concave portion that leads to the piercing needle piercing the medication unit. - View Dependent Claims (17, 18, 19)
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20. Handling unit for hypodermic injections comprising
a first shell providing an explosion chamber and an explosive therein, a second shell with a piercing needle disposed therein a medication unit having a concave portion and being sandwiched between first and second shell wherein the concave portion is being arranged beneath a pointed end of said needle and pressure applied to the medication unit generates a flexing deformation of the concave portion thus leading to a piercing of the medication unit.
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24. Hypodermic injection system comprising
a medication unit (51) in which liquid to be injected is stored and which has a first and a second region, said first region being squeezable or flexible and said second region having at least one orifice, an explosion chamber (92) in which the medication unit is located at least partially and a pressure generated within said explosion chamber is deforming said first region of the medication unit, an activatable gas generator (93) located inside the explosion chamber (92) which generates a pressure within the explosion chamber when activated, wherein said explosion chamber has a vent which allows gas escaping the explosion chamber in a controlled way.
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26. A medication unit for use in a hypodermic injection system, which comprises:
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(a) a first region which is deformable and configured and dimensioned to store a liquid to be injected;
(b) a second region having at least one orifice, the second region being in liquid communication with the first region, the first region and the second region being separate pieces that are enveloped within a common wall;
(c) liquid medication contained within the first region, the second region, or both the first region and the second region; and
(d) a closure for closing the at least one orifice. - View Dependent Claims (27, 28)
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29. A medication unit for use in a transdermal injection system, which comprises:
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(a) a first region which is deformable and formed by a wall;
(b) a second region which is formed from a piece of material separate from that of the first region, the second region having at least one orifice and being in liquid communication with the first region, the first region and the second region being enveloped within in the wall of the first region;
(c) liquid medication contained within the first region and the second region; and
(d) a closure for closing the at least one orifice. - View Dependent Claims (30, 31, 32, 33)
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- 34. A medication unit for use in a hypodermic injection system, which comprises a first segment and a second segment, each configured and dimensioned to be fixed to one another to form a cavity for a liquid medication, the second segment configured to have a concave portion that flexes outwardly when pressure is applied to the first segment, the first segment and the second segment being welded together and the medication unit having a thickened portion annularly surrounding the cavity at the point where the first segment and the second segment are welded together.
Specification