Patent ID: 7644841
Filing Date: 2010-01-12
Classification: B05B

Abstract:
1. A manual dispenser of the type comprising: a) a bottle of fluid, b) a diaphragm at internal bottom of said bottle, c) a tube and a spout in series attached to said diaphragm that communicates a measured quantity of said fluid within said diaphragm through said tube through said spout and out an exit end of said spout above said bottle and a cap of said bottle as said diaphragm is compressed manually by a pressing force on said spout and said tube, and d) a set of check valves to ensure said fluid flows one way out of said spout and allows said diaphragm to refill with said fluid when said pressing force is removed and said diaphragm returns to an uncompressed shape for the next dispensing cycle;  the following improvements comprising: e) said diaphragm is a blister diaphragm having a top opening and a bottom opening that are more or less concentric to a vertical axis; when said blister diaphragm is pressed with said pressing force against said internal bottom, a bottom edge of said bottom opening forms a seal at said internal bottom and forces said fluid within said blister diaphragm up said top opening through said tube and said spout; said bottom edge expands substantially radially from said vertical axis over said internal bottom to a self-breaking means that breaks said seal to allow said blister diaphragm to refill when said pressing force is removed, f) a slide-pin to prevent said blister diaphragm, said tube, and said spout from wobbling during dispensing, but does not substantially impede flow of said fluid, g) a nozzle means that integrates a valve to allow said fluid to flow in one direction and a channel to confine said fluid into a stream;  whereby, said dispenser can be made from as few as five parts including said cap and said bottle; said parts are simple and have relaxed tolerances; fluid will not dry and clog said spout; and last ounce of said fluid will be dispensed.