Disposable plastic syringe for medical use and a plastic...

Details Disposable plastic syringe for medical use and a plastic... Disposable plastic syringe for medical use and a plastic...

A - Human Necessities

61

F

128/84

A61F 5/00 (2006.01) A61M 5/315 (2006.01) A61M 5/34 (2006.01)

Patent

CA 1226496

ABSTRACT A disposable plastic syringe for medical use, comprising a barrel (1) and a plunger (2), said plunger (2) having an axial plunger shaft (3) which is rigidly but releasable connected to the plunger (2). The plunger (2) is a substantially bell-shaped, at least partially soft-elastic body of revolution made of thermoplastic material, preferably of polyethylene. The plunger skirt has soft-elastic wall sections of reduced wall thickness. The upper end of the barrel (1) is closed by a closure member (4) containing a substantially reten- tive, definite slide guide of appropriate length for the plunger shaft (3) whereby transfer of deformations of the latter to the plunger (2) caused by axial and/or eccentric load that is readily exercised on the relatively thin plunger shaft (3) especially in its outermost upper end stroke during operation, are practically excluded.

444823

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