A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/50 (2006.01) A61M 5/315 (2006.01) A61M 5/34 (2006.01)
Patent
CA 2150404
The present invention is related to instruments that are not used twice, for the application of injections, blood extraction, etc., and more particularly it refers to an autodiscardable hypodermic syringe. To the specified ends, and such as it has been claimed, said hypodermic auto-discardable syringe is of the type consisting in a hollow barrel (a) in which a plunger (16) is guided in a shifting manner, the same conforming chamber of compression of variable capacity, communicated with the outside through a coupling nozzle (3) to a needle; and said plunger (16), is connected to a rod (b), that, at the rear end part (2) of the hollow barrel (a) it ends in a command header (10); characterized because the rod (b), being rotative, has, at least, one longitudinal guiding helix (4') that, on one part, goes across a guiding eyelet (6-6') practised in a rear end stopper (5) of said hollow barrel, to end in an end (8) in which the command header (10) is mounted rotatively; while at the other end (12), said rod (b) finishes in a terminal (13) which can be vinculated with the plunger (16) through the coupling means (c) provided by the own plunger (16); and these coupling means (c) consist of: an alternative coupling and uncoupling passage (14) of the terminal (13), retention means (15) combined with an opposite first supporting set (15') of the same terminal (13) coupled with the plunger (16) -which correspond to the normal run of aspiration and gyration in the receding way of the helix (4'), and a second set of opposite supports of the terminal (13) -that opposed to the ones of the first set (15') and corresponding to the normal run of compression the aligns with the referred uncoupling passage (14) (of blood, biopsy puncture, etc.).
Baron Carlos Maria
Gowling Lafleur Henderson Llp
LandOfFree
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