Hypodermic syringe
First Claim
1. A hypodermic syringe comprising:
- a hypodermic needle having a needle duct therein, said needle having an operative position and a readiness position;
a plunger connected to the needle;
side by said first and second containers, said first container including a needle space therein with said needle disposed in the needle space in the readiness position, and said second container comprising a closed container arranged beside the needle space;
a first force storage means acting on said plunger operative to extend the needle from the readiness position in the needle space to the operative position outside the needle space;
an injection material chamber in the second container which accommodate a hypodermic liquid, wherein said chamber is connected to the needle duct in the operative position of the needle;
a piston in the second container operative to put the hypodermic liquid under pressure;
means to activate the piston in coordination with the activation of the plunger by the first force storage means;
second force storage means for returning the hypodermic needle from the operative position to the needle space in a closure position, including means in the needle space engaging said second force storage means in the readiness position of the needle;
means for retaining said needle in the operative position and releasing said needle from the operative position to permit return of the needle from the operative position to the closure position in the needle space by the second force storage means; and
means for retaining the needle in the needle space int he closure position after return from the operative position by the second force storage means.
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Accused Products
Abstract
In a hypodermic syringe (10) with a hypodermic needle (20) which is adapted to be extended from a needle space (19) from a readiness position into an operative position by a force storage means (28), the invention seeks to make it possible to render the hypodermic needle (20) inaccessible after use. For that purpose the hypodermic needle (20) is arranged to be returned from the operative position by a force storage means (62) into the needle space (19) or a receiving space (11), which surrounds same at least at times, for receiving the needle space (19), or it is connected to a plunger (24) which is disposed in the needle space (19) and which is provided at its end face remote from the needle with at least one retaining recess for a pulling member, the recess being accessible from the exterior.
75 Citations
18 Claims
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1. A hypodermic syringe comprising:
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a hypodermic needle having a needle duct therein, said needle having an operative position and a readiness position; a plunger connected to the needle; side by said first and second containers, said first container including a needle space therein with said needle disposed in the needle space in the readiness position, and said second container comprising a closed container arranged beside the needle space; a first force storage means acting on said plunger operative to extend the needle from the readiness position in the needle space to the operative position outside the needle space; an injection material chamber in the second container which accommodate a hypodermic liquid, wherein said chamber is connected to the needle duct in the operative position of the needle; a piston in the second container operative to put the hypodermic liquid under pressure; means to activate the piston in coordination with the activation of the plunger by the first force storage means; second force storage means for returning the hypodermic needle from the operative position to the needle space in a closure position, including means in the needle space engaging said second force storage means in the readiness position of the needle; means for retaining said needle in the operative position and releasing said needle from the operative position to permit return of the needle from the operative position to the closure position in the needle space by the second force storage means; and means for retaining the needle in the needle space int he closure position after return from the operative position by the second force storage means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A hypodermic syringe comprising:
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a hypodermic needle having a needle duct therein, said needle having an operative position and a readiness position; a plunger connected to the needle; side by side first and second containers, said first container including a needle space therein with said needle disposed in the needle space in the readiness position, and said second container comprising a closed container arranged beside the needle space; a force storage means acting on said plunger operative to extend the needle from the readiness position in the needle space to the operative position outside the needle space; an injection material chamber in the second container which accommodates a hypodermic liquid, wherein said chamber is connected to the needle duct in the operative position of the needle; a piston in the second container operative to put the hypodermic liquid under pressure; at least one retaining recess provided in each of the end faces of the plunger and piston remote from the needle which are accessible from the exterior, and corresponding pull members connected to said recesses, and linkages for actuating said pull members. - View Dependent Claims (18)
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Specification