Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-01-09
1993-09-07
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604198, A61M 532
Patent
active
052424162
ABSTRACT:
Five embodiments of a shield assembly for a syringe having a plunger barrel and a mounting at the other end of the syringe for receiving a needle hub, an inner sheath adapted for being secured to the syringe, an outer cylindrical sheath in telescoping relation on the inner sheath and movable between a retracted position and extended position, and locking elements formed on the two sheaths for locking them in extended and/or retracted relation, the locking elements being releasable by relative rotation of the sheaths. The various embodiments include an additional intermediate sheath nested between the inner and outer sheaths with the locking elements functioning through the three sheaths, guide elements for maintaining alignment of the locking elements, a spiral track for effecting relative rotation of adjacent sheaths.
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Bucher John A.
Yasko John D.
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