Disposable syringe

Details Disposable syringe Disposable syringe

1992-10-15

1994-01-04

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604222, A61M 500

Patent

active

052755827

ABSTRACT:
A disposable syringe comprises a syringe cylinder and a syringe piston. The syringe cylinder is open at one end and at its other end has an end wall, which is closed with the exception of a region adjacent to a needle holder. The syringe piston comprises a piston skirt, which protrudes from the syringe cylinder, and a piston head, which is disposed within the syringe cylinder and provided with an annular seal. The annular seal is connected to the piston head by an annular peripheral flange.
In order to provide a syringe which can easily be actuated and is nevertheless absolutely tight, the flange is frustoconical and flares toward the piston skirt. The radial distance from the inside peripheral surface of the hollow frustoconical flange to the piston skirt increases continuously. The flange is adjoined by the annular seal, which consists of a coaxial cylinder and freely protrudes on the side of the piston head.

REFERENCES:
patent: 4704105 (1987-11-01), Adorjan et al.

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