Patent · US Active

Syringe assembly having disabling mechanism

US7575570B2 · kind B2 · utility

8Cited by
5References
29Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJan 25, 2008
Grant dateAug 18, 2009
Priority date—
Expiry dateJan 25, 2028

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61M2005/5073
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

A syringe assembly having passive disabling structure includes a barrel and a plunger rod assembly. The plunger rod assembly includes a plunger rod and a stopper connected by an indexing locking element. The number of strokes of the syringe plunger before the stopper is locked into the barrel rendering the syringe assembly unusable is determined by the number of detents on the plunger rod and stopper which engage the locking mechanism. Upon completion of the final delivery stroke, any attempt to withdraw the plunger rod from the barrel will cause the locking element to engage the barrel and trap the stopper in the barrel preventing further use of the syringe.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.