Patent ID: 6145710
Filing Date: 2000-11-14
Classification: B05B

Abstract:
A metered output fluid dispenser adapted for connection to a container of fluid to receive fluid therefrom, said dispenser having a rest position at which fluid does not flow into the dispenser, said dispenser being adapted to discharge fluid during a selected section of a stroke which produces fluid discharge, said dispenser comprising:a vertical hollow elongated body having a first hollow cylinder having a first diameter and an integral section defining a second hollow cylinder having a second and different diameter, said second cylinder having upper and lower spaced apart enlargements defining therebetween a selected portion of the second cylinder, said second cylinder having an opening below the lower enlargement through which fluid can flow into the dispenser from the container;a first piston slidable through the length of the first cylinder and remaining in continuous sealing relationship engagement with the inner wall of the first cylinder;a second piston slidable through the second cylinder, said second piston when traversing said selected section being in sealing engagement therewith allowing the dispenser to dispense fluid, said second piston when aligned with either one of said enlargements being out of sealing engagement therewith and preventing the dispenser from discharging fluid; said second cylinder being aligned with the upper enlargement when the dispenser is in rest position, the second cylinder when aligned with the lower engagement allowing charging fluid to flow therethrough.