Disposable syringe

Details Disposable syringe Disposable syringe

A - Human Necessities

61

M

A61M 5/178 (2006.01) A61M 5/315 (2006.01) A61M 5/34 (2006.01)

Patent

CA 2080999

A disposable syringe comprising 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. So that the syringe can easily be actuated and is nevertheless absolutely tight, the flange is frusto- conical and flares toward the piston skirt. The radial distance from the inside peripheral surface of the hollow frustoconical flange to the piston skirt increases continu- ously. The flange is adjoined by the annular seal which consists of a coaxial cylinder and freely protrudes on the side of the piston head.

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