Release valve assembly for pump sprayer

Application Number: 00109331
Application Date: 2000.06.01
Publication Number: 1275446
Publication Date: 2000.12.06
Priority Information: 1999/6/1 US 09/323160
International: B05B1/34;B05B11/00
Applicant(s) Name: Calmar Inc.
Inventor(s) Name: Joself K. Dode
Patent Agency Code: 72002
Patent Agent: liu xinpeng
Abstract A trigger actuated pump sprayer has a discharge valve assembly located in the discharge barrel of the pump body which includes a filler for reducing the volume of the discharge barrel whereupon the strokes-to-prime ratio is improved. Also the discharge valve assembly may be shiftable along the length of the discharge barrel in response to pressure and return strokes during pumping, a downstream end of the assembly engaging a spin mechanics element at the nozzle end to therewith define a variable volume suction chamber in communication with the discharge orifice for withdrawing product therefrom during each pumping suction stroke.