Patent ID: 6966720

Claim:
A brush shaft for connection between a brush handle and a brush head, said brush shaft comprising: a support wall defining a fluid conduit extending along said brush shaft; a first valve disposed in said fluid conduit proximate a brush shaft brush head end at a distal end of said shaft; a refill valve disposed in said fluid conduit proximate a brush shaft brush handle end at a proximal end of said shaft; and a non return valve disposed in said fluid conduit intermediate said first valve and said refill valve, said refill valve being in fluid connection with said fluid conduit and a threaded opening at said brush handle end of said shaft for receiving fluid via said opening from a source proximal thereof, wherein said shaft functions with a fluid source that permits fluid to flow through said refill valve without causing a sustained substantial pressure drop in a proximal source of fluid, wherein said fluid conduit comprises a dispensing volume defined by a piston disposed in said fluid conduit.