Discharge valve assembly for trigger sprayer

Details Discharge valve assembly for trigger sprayer Discharge valve assembly for trigger sprayer

1999-06-01

2000-10-17

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With cleaning means, drip collecting, waste disposal or soil...

Nozzle cleaner, flusher or drainer

239333, 239492, B05B 1502, B05B 9043, B05B 134, F23D 1134, A62C 1100

Patent

active

061318205

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 thereby displacing the air therein whereupon the strokes-to-prime ratio of the pump required during initial pumping for discharging pressurized liquid along the barrel and through the orifice at a nozzle end thereof, 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.

REFERENCES:
patent: Re33235 (1990-06-01), Corsette
patent: 4527741 (1985-07-01), Garneau
patent: 4706888 (1987-11-01), Dobbs
patent: 4958754 (1990-09-01), Dennis
patent: 5114052 (1992-05-01), Tiramani et al.
patent: 5181658 (1993-01-01), Behar
patent: 5234166 (1993-08-01), Foster et al.
patent: 5509608 (1996-04-01), Foster et al.
patent: 5518147 (1996-05-01), Peterson et al.
patent: 5535950 (1996-07-01), Barraic et al.
patent: 5593093 (1997-01-01), Foster et al.
patent: 5711459 (1998-01-01), Glynn
patent: 5785208 (1998-07-01), Dobbs et al.

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