LOCKABLE SYRINGE AND METHOD OF ASSEMBLING SAME

摘要

A lockable syringe having an actuating mechanism for rapidly and selectively placing a movable thread bearing plunger member and stationary internally threaded cylinder into or out of threaded engagement, particularly for using the syringe to pressurize therapeutic medical balloon catheters, or the like. The mechanism includes a plunger having both a piston at its end to engage a barrel portion of a unitary syringe body, selectively deployable and retractable threaded segment, and an internally threaded cylindrical structure disposed within a unitary syringe body having a barrel. The plunger is engageable with the threaded cylinder by means of a threaded segment, and an operator actuated desmodromic arrangement to controllably reciprocate the threaded segment in a positive manner in order to allow either rapid manual or thread controlled plunger and piston movement within the syringe's barrel for purposes of displacing or pressurizing working fluid contained therein.

主权项

1. A lockable syringe for pressurizing a medical device, said lockable syringe comprising: an internally threaded member; a plunger, wherein at least a portion of the plunger is in the internally threaded member; a member having an external thread thereon, said member being carried by the plunger; a locking actuator which extends into the plunger and engages the member having the external thread thereon, wherein the locking actuator is actuatable to disengage the member having the external thread thereon from the internally threaded member, thereby allowing the plunger to slide relative to the internally threaded member, without having to rotate the plunger.