Patent ID: 7673819

Claim:
An electrohydrodynamic spray device comprising: a fluid dispensing cartridge comprising: a body defining a substantially closed fluid chamber therein, said fluid chamber configured to contain a fluid therein, said fluid chamber comprising a proximal end and a distal end substantially opposite said proximal end; a lead screw disposed within said fluid chamber; a piston threadably cooperative with said lead screw such that upon rotation of said lead screw, said piston advances toward said distal end to force at least a portion of said fluid out of said cartridge; and a seal associated with said piston and threadably cooperative with said lead screw such that upon said advancing of said piston, said seal inhibits fluid leakage along said lead screw, said seal being made from a material softer than that of said screw; a handle comprising a rotational power source and a high voltage electrical source therein, said handle configured to attachably receive said cartridge; a spray manifold in fluid communication with said cartridge; and a plurality of nozzles in fluid communication with said spray manifold, at least one of said manifold and said plurality of nozzles in electrical communication with said high voltage electrical source such that upon application of a voltage to said at least one of said manifold and said plurality of nozzles, at least a portion of said fluid being discharged from said plurality of nozzles is comminuted.