Patent ID: 7571750
Filing Date: 2009-08-11
Classification: A61B,H05G

Abstract:
1. A tool for transferring controlled amounts of fluid into and from a fluid flow circuit, said tool comprising: a substantially closed tube having a first end and a second end, an inner surface and an outer surface, and a chamber defined therein; an elongate plunger having a fore end extending inside said chamber and toward said second end of said tube, an aft end extending outside said chamber and from said first end of said tube, a piston-like structure on said fore end adapted for establishing and maintaining close sliding contact and a tight seal between the periphery of said piston-like structure and said inner surface of said tube along the length of said tube, and a manipulable structure on said aft end adapted for adjusting the position of said piston-like structure within said chamber of said tube; a fluid inlet duct having a proximal end mounted on said tube so as to be in fluid communication with said chamber inside said tube, and a distal end extending from said tube; a first coupler mounted on said distal end of said fluid inlet duct for connecting said fluid inlet duct in line with said fluid flow circuit; a fluid outlet duct having a proximal end mounted on said second end of said tube so as to be in fluid communication with said chamber inside said tube, and a distal end extending from said tube; a second coupler mounted on said distal end of said fluid outlet duct for connecting said fluid outlet duct in line with said fluid flow circuit; and a fluid transfer duct having a proximal end mounted on said tube so as to be in fluid communication with said chamber inside said tube, and a distal end extending from said tube; wherein said second coupler includes an automatic shut-off valve that automatically opens said fluid outlet duct when connected to said fluid flow circuit and that automatically closes said fluid outlet duct when disconnected from said fluid flow circuit.