Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1988-02-08
1989-05-23
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604208, A61M 500
Patent
active
048326941
ABSTRACT:
A programmed action hypodermic syringe includes a syringe barrel having at least one pin protruding into the bore of the barrel. A plunger is adapted to travel through the bore and has, on its exterior surface, at least one longitudinal tracking groove defining relative motion of the pin. The tracking groove has a continuous cam side allowing unlimited travel of the pin along a complete fill or drain stroke. Opposite the continuous cam side is a discontinuous cam side defining traps for the pin should the user reverse directions before completing the fill or drain stroke. Two tracking grooves are preferably provided to define a complete allowed path along a fill tracking groove and a drain tracking groove. These two grooves converge near an end of the plunger adjacent a fluid content chamber of the syringe barrel. The sides of the confluence are configured such that when the pin reached the confluence, that is at the point of passing from the completely filled position to the initial drain position, the pin moves by cam action into the drain tracking groove.
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Raphael Besse
Raphael Sheila R.
Raphael, II Julian J.
Raphael, III Julian J.
Lewis Ralph
Pellegrino Stephen C.
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