Patent ID: 6223951
Filing Date: 2001-05-01
Classification: B05B

Abstract:
A manually actuated pump sprayer comprising, a pump body including a hollow pump piston reciprocable in a pump cylinder against a piston return spring to therewith define a pump chamber, the piston having a stem defining a discharge passage leading to a discharge orifice located in a side wall of a plunger head on said stem, a cover mounted on said head for relative movement toward and away from said head against a cover return spring acting between said head and said cover, said cover return spring having a spring force less than a spring force of said piston return spring to facilitate the relative movement of said cover upon application and release of a finger force against a top wall of said cover, continued application of finger force effecting reciprocation of the piston, the improvement wherein,a product retraction device is provided on said plunger head in communication with said passage and said orifice, said device including a depressible element for creating suction, andsaid top wall of said cover having a projection extending toward said product retraction device and being spaced therefrom for depressing said element only at the commencement of a piston pressure stroke and for releasing said element at the commencement of a piston return stroke for thereby retracting product from said orifice.