Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1988-08-15
1990-03-13
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604110, 604192, A61M 532
Patent
active
049080237
ABSTRACT:
A syringe assembly having a hollow barrel, a plunger and a hypodermic needle and is discardable after a single use. The hypodermic needle has a first end fixedly secured to and in communication with the barrel and has a free end for the discharge of medication therefrom upon the downward movement of the plunger within the barrel. The barrel is covered by a two-part hollow cylindrical sheath having a first part extending, when in a first position, along the barrel a distance allowing at least the partial exposure of the hypodermic needle and having a second part extending, when in the first position, a distance beyond the free end of the needle to substantially cover the same. The second part of the sheath has one end coupled to the first part by a breakable joint which can be broken so that the second part may be discarded prior to use. The needle includes a ratchet system to allow the first part of the sheath to be extended over the hypodermic needle after the syringe has been used which ratchet system includes a locking pawl to permanently prevent movement of the sheath upwardly along the syringe barrel.
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Polutta Mark O.
Rosenbaum C. Fred
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