Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-07-27
1991-05-28
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604195, A61M 500
Patent
active
050190431
ABSTRACT:
A syringe with a plunger having a compressible piston at its forward end and a harpoon-shaped member extending forward and away from the piston. The plunger travels within a syringe casing which has locking openings at its rearward end. The harpoon-shaped members has a rearward member which biases two locking lugs outward. The harpoon-shaped member is releasably retained within a cavity in the piston. The plunger includes a pair of channels running along its length as well as a crosspiece positioned within each channel which provides a slot into which the locking lugs are received. Following an injection with the syringe, the piston and harpoon-shaped member are pushed forward into the casing resulting in a compression of the piston and the attachment of the harpoon-shaped member to an inner part of a needle holder. The plunger with attached needle can then be retracted until the two locking lugs snap into the openings formed in the outer casing. With the locking lugs received within the casing openings, it is possible to force the plunger forward resulting in the crosspieces snapping off and the disengagement of the piston from the harpoon-shaped member such that the plunger can be nestled within the syringe casing. In an alternate embodiment, a compressed spring forces the harpoon-shaped member rearwardly and into a locking arrangement with the casing openings following a shearing off of the crosspieces.
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Galiana Sabater Amando
Segui Pastor Enrique
Segui Pastor Vicente M.
Pellegrino Stephen C.
Rafa Michael
Segui Pastor Vincent Miguel
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