Automatically disabled syringe
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 8, 2011
Grant Date -
Aug 28, 2008
app pub date -
Jan 28, 2005
filing date -
Jan 28, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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