Flap valve assembly for trigger sprayer

Details Flap valve assembly for trigger sprayer Flap valve assembly for trigger sprayer

1992-02-24

1994-07-26

Kashnikow, Andres

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

B67D 540

Patent

active

053321286

ABSTRACT:
The pumping mechanism is used in a trigger operated fluid dispensing device, e.g. a trigger sprayer, for pumping fluid from a storage container into a discharge end of a body of the dispensing device. The pumping mechanism includes a chamber within the body of the trigger sprayer, a piston received in the cylinder, two flap valves associated with an internal back wall of the chamber, and a manually operated trigger movably connected to the body of the dispensing device and coupled to an outer end of the piston. The flap valves are normally closed and pressure controlled to ensure a quick filling and emptying of the collection chamber.

REFERENCES:
patent: Re33235 (1990-06-01), Corsette
patent: 1464419 (1923-08-01), Gill
patent: 3973700 (1976-08-01), Schmidt et al.
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patent: 4225061 (1980-09-01), Blake et al.
patent: 4230277 (1980-10-01), Tada
patent: 4235353 (1980-11-01), Capra et al.
patent: 4241853 (1980-12-01), Pauls et al.
patent: 4410107 (1983-01-01), Corsette
patent: 4618077 (1986-10-01), Corsette
patent: 4819835 (1989-04-01), Tasaki
patent: 4890773 (1990-01-01), Corsette
patent: 4958754 (1990-09-01), Dennis
patent: 5169032 (1992-12-01), Steijns et al.

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