Hypodermic syringe

Details Hypodermic syringe Hypodermic syringe

1985-03-29

1986-12-16

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 5315

Patent

active

046294546

ABSTRACT:
A squeezing finger pressure is exerted on a trigger (100) carried by a finger-grip body (12) of a hypodermic syringe (10). The depressed trigger (100) displaces the free end of a cantilever spring (34) inwardly, moving a lock element (88) out from a radial opening (90) in a sidewall portion of the finger-grip body (12). This frees a compression spring (78) allowing it to drive an internal bushing (14), of which the cantilever beam spring (24) is a part, against a cartridge (28) within a barrel portion (16) of the syringe (10). The cartridge (28) carries a needle (18) at its forward end. The needle is moved into tissue in which an injection is to be made. A plunger (20) is moved against a piston (42) within the cartridge (28) to cause injection. The plunger (20) includes a penetrator rod (58) at its forward end. The penetrator rod (58) is of such a length in diameter that when it is fully pushed into the piston (42) it causes a forward portion of the piston (42) to distort and bulge forwardly, displacing liquid from the cartridge (28) as it moves. When pressure is removed from the plunger (20), the forward portion of the piston (42) relaxes and moves rearwardly, creating an aspirating action within the cartridge (28).

REFERENCES:
patent: 3618603 (1971-11-01), Levenson
patent: 4216771 (1980-08-01), Arlers

Affiliated with

Also associated with

Rating

Hypodermic syringe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hypodermic syringe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hypodermic syringe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-243517