Patent ID: 6253961
Filing Date: 2001-07-03
Classification: B05B,B67B

Abstract:
A fluid dispenser, comprising:(a) a body member having a fluid communication channel and a dose cylinder of a predetermined volume, said fluid communication channel being communicatively connected with said dose cylinder;(b) a fluid egress conduit communicatively connected to said dose cylinder;(c) a dose valve positioned and arranged to govern fluid flow from said fluid communication channel to said dose cylinder;(d) a piston valve positioned and arranged to govern fluid flow out of said fluid egress conduit;(e) a piston member having a piston head, a distal end and a piston rod connecting said piston head to said distal end, said piston head being sealingly disposed within said dose cylinder;(f) a trigger member attached to said distal end of said piston member; and(g) a dispensing mechanism positioned and arranged to dispense measured doses out of said fluid egress conduit, said dispensing mechanism including:(i) a stop member having an engagement part; and(ii) at least one abutment formed on said piston member for contacting said engagement part and for limiting motion of said piston member, and wherein said piston rod has a cylindrically-shaped surface, said at least one abutment comprising a plurality of abutments circumferentially spaced around and staggered lengthwise on said piston rod surface, each of said plurality of abutments corresponding to a predetermined range of longitudinal movement by said piston member.