A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/32 (2006.01) A61M 5/24 (2006.01)
Patent
CA 2118951
ABSTRACT The present invention relates to a disposable medical syringe which has a hollow plunger to receive a used inoculation needle. The syringe has a hollow syringe barrel, open on one end and closed on the other. A hollow plunger assembly, which extends out the open end of the syringe barrel, has a hollow tube with a fixed seal attached at one end. At the other end of the plunger assembly, a needle holder is sized to slide within the hollow tube. The sliding seal and needle holder are biased toward each other by a stretched, resilient tube that has a fluid passageway passing through the sliding seal, resilient tube, and needle holder. The needle holder is normally locked at one end of the plunger assembly by a locking means. As the syringe is collapsed, the syringe barrel trips the locking means to permit the needle holder, and attached inoculation needle, to be retracted into the hollow tube. The three components-- inoculation needle, hollow tube, and syringe barrel--are telescoped together by this action to compact the throw-away unit with the used inoculation needle resting in a position protected by the double outer walls.
Jore Matthew B.
Macrae & Co.
LandOfFree
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