Disposable syringe for injections

Details Disposable syringe for injections Disposable syringe for injections

1991-03-18

1992-08-04

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604110, A61M 5315

Patent

active

051355124

ABSTRACT:
A disposable syringe for injections comprises a cylindrical housing (1), which accommodates a piston (5) with a rod (6), and a needle fixing device (4). The piston (5) and the rod (6) are mechanically disengaged from each other, a flange (7) is provided at the end of the rod (6), and a washer (8) is fitted on the rod (6) coaxially therewith. The diameter of the hole in the washer (8) is smaller than the diameter of the flange (7), while the outside diameter of the washer (8) exceeds the inside diameter of the housing (1) by such an amount that the force of friction between the outer surface of the washer (8) and the inner surface of the housing (1) surpasses the force exerted upon the washer (8) as a result of motion performed by the housing (1), including as accelerated motion thereof. The disposable syringe is equally applicable in any medical institution and for individual use.

REFERENCES:
patent: 4973308 (1990-11-01), Borras et al.

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