Patent · US Active

Automatically disabled syringe

US8052654B2 · kind B2 · utility

20Cited by

8References

28Claims

0Family size

Assignee

UNITRACT SYRINGE PTY LTD · AU

Inventors

Joseph Hermes Kaal · Maitland, AU
Craig Stephen Thorley · Maitland, AU
Damien Judd · Melbourne, AU

Key dates

Filing date	Jan 28, 2005
Grant date	Nov 8, 2011
Priority date	—
Expiry date	Apr 3, 2027

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M5/502
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A syringe (10) has a plunger (20), a barrel (11) and a collar (40, 50) with two pawls (42A, 42B). The plunger has two opposed ratchets (23A, 23B) that align with the one each of the pawls and thereby or impede, withdrawal of the plunger during or following depression of the plunger. The barrel has a collar with an inner (50) and an outer member (40) that are incapable of rotation relative with respect to each other. The outer member has the two pawls (42A, 42B) and two fingers that slidably engage opposed guide slots (28) on the plunger to thereby prevent or minimize rotation of the plunger relative to the collar. The inner member of the collar is operable to prevent engagement of the plunger ratchet by the two pawls until the plunger is depressed.

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