Removable needle attachment having a detachable needle

Details Removable needle attachment having a detachable needle Removable needle attachment having a detachable needle

1987-06-08

1989-06-13

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604264, A61M 5325

Patent

active

048388700

ABSTRACT:
A needle attachment to be removably attached to the distal end of a syringe cylinder. The needle attachment comprises a needle carrying hub and a coaxially aligned hypodermic needle which is retained by friction within a hole extending through the hub. The needle includes a needle stop to prevent the detachment of the needle from the hub in a distal direction through the hole. The needle terminates at a needle catch that is spaced inwardly from the distal end of the cylinder. A piston assembly having a needle capturing receptacle located at one end thereof moves axially and distally through the syringe cylinder to expulse fluid medication and to selectively engage the needle catch of the hypodermic needle at the most distal aspect of the cylinder. The piston assembly is then moved axially and proximally through the syringe cylinder to detach the hypodermic needle from the needle carrying hub and relocate said needle from the distal end to a relatively proximal position within the cylinder. The needle extends from the piston assembly with the needle catch securely anchored within the needle capturing receptacle and the needle cannula completely surrounded and shielded by the cylinder. Accordingly, the syringe may be safely disposed of without having to either handle or destroy the needle.

REFERENCES:
patent: 2667872 (1954-02-01), Smith
patent: 4675005 (1987-06-01), DeLuccia
patent: 4710170 (1987-12-01), Haber et al.
patent: 4747829 (1988-05-01), Jacob et al.
patent: 4747830 (1988-05-01), Gloyer et al.

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