Pre-filled safety syringe having a retractable needle

Details Pre-filled safety syringe having a retractable needle Pre-filled safety syringe having a retractable needle

1994-07-15

1996-07-16

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 550, A61M 532

Patent

active

055362532

ABSTRACT:
The syringe of the present invention is ideally supplied to the user in a pre-filled state, with the piston stem protruding from the syringe body and with the cannula covered with a protective cover. Once the disposable safety syringe of the present invention is unwrapped, it may be used for performing an injection in the usual way. As the last bit of fluid is injected through the cannula, the piston engages the proximal portion of the needle axial translating structure. The piston stem is then withdrawn back through the syringe body, pulling the cannula inside the syringe body. The piston is prevented from exiting the syringe body because of the presence of a flange at the proximal end of the syringe. The piston stem is then quickly removable from the piston by disengaging the large-pitch thread with which it was attached to the piston, which eliminates the possibility of inadvertent proximal motion of the piston.

REFERENCES:
patent: 2879766 (1959-03-01), Wilburn
patent: 4192919 (1980-03-01), Raghavachavi
patent: 4459997 (1984-07-01), Sarstedt
patent: 4808169 (1989-02-01), Haber et al.
patent: 4908022 (1990-03-01), Haber
patent: 4909794 (1990-03-01), Haber et al.
patent: 4931040 (1990-06-01), Haber et al.
patent: 5032114 (1991-07-01), Olovson
patent: 5098382 (1992-03-01), Haber et al.
patent: 5188601 (1993-02-01), King
patent: 5267962 (1993-12-01), Jenson
patent: 5328484 (1994-07-01), Somers et al.
patent: 5330440 (1994-07-01), Stanners et al.
patent: 5380286 (1995-01-01), van den Haak
patent: 5408326 (1995-04-01), Haber et al.

Affiliated with

Also associated with

Rating

Pre-filled safety syringe having a retractable needle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pre-filled safety syringe having a retractable needle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-filled safety syringe having a retractable needle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1781238