Sliding piston for syringe

Details Sliding piston for syringe Sliding piston for syringe

1998-05-05

1999-09-14

Stright, Jr., Ronald

Surgery

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

Treating material introduced into or removed from body...

604228, 604230, A61M 5315

Patent

active

059515279

ABSTRACT:
A sliding piston for a syringe, which is inserted in a hollow barrel of a syringe is made of a substantially cylindrical body having a shape symmetrically rotatable with respect to the axis of the hollow barrel. The cylindrical body has its largest diameter at the front end thereof. The peripheral edge of the front end of the cylindrical body is rounded at a radius of curvature of 5/100 mm to 10/100 mm. The diameter of the rear end of the cylindrical body is smaller than the inner diameter of the hollow barrel so as not to contact with the inner surface of the hollow barrel when the piston is inserted in the hollow barrel.

REFERENCES:
patent: 4747838 (1988-05-01), Wolff et al.
patent: 4986820 (1991-01-01), Fischer
patent: 5743890 (1998-04-01), Hjertman et al.
patent: 5782815 (1998-07-01), Yanai et al.

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