Locking syringe with integrated bias member
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United States of America Patent
Stats
-
Apr 2, 2013
Grant Date -
Mar 24, 2011
app pub date -
Sep 18, 2009
filing date -
Sep 18, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A locking syringe with an integrated bias member, for delivering medical fluids at high pressure, can include a housing, a shaft, a piston, a cap assembly, a bias member, and a locking member. A distal end of the housing can interface with a patient delivery apparatus. A piston can be connected to the distal end of the shaft and can include a peripheral sealing surface that can slidably engage the inside surface of the housing to form a movable seal. The cap assembly at the proximal end of the housing can engage the shaft. A base cap can secure the piston within the housing. The bias member can have a distal end coupled to the piston and a proximal end restrained, such as to help pressurize the internal cavity. The user-actuatable locking member can user-selectively engage and inhibit unwanted movement of the shaft.
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