Dispensing – With discharge assistant – Plural
Patent
1988-09-23
1990-07-31
Rolla, Joseph J.
Dispensing
With discharge assistant
Plural
222380, 222383, 222545, 239333, B67D 540
Patent
active
049444310
ABSTRACT:
A trigger actuated dispenser pump for dispensing product from a container, in which a multi-function piston member has a primary piston reciprocable in a pump chamber and a secondary piston reciprocable in an outlet chamber. The primary piston draws product from the container, pressurizes it and pumps it into the outlet chamber. The secondary piston functions to reduce pressure in the outlet chamber during initial movement of the pump, tending to promote flow from the pump chamber into the outlet chamber. A flow restrictor is positioned in the pump chamber and is operative to limit reverse flow from the pump flow into the container. An outlet valve in the outlet chamber functions to prevent dribbling of product at the end of a discharge or pressure stroke, remaining closed when the pressure of product in the outlet chamber is below a predetermined minimum, and a positive shut-off valve may be positioned in the outlet chamber for precluding flow from the pump when it is an at-rest position.
REFERENCES:
patent: 3913841 (1975-10-01), Tada
patent: 4155487 (1979-05-01), Blake
patent: 4191313 (1980-03-01), Blake et al.
patent: 4273268 (1981-06-01), Wickenberg
patent: 4365751 (1982-12-01), Saito et al.
patent: 4624413 (1986-11-01), Corsette
patent: 4815663 (1989-03-01), Tada
DeRosa Kenneth R.
Lambert Dennis H.
Rolla Joseph J.
LandOfFree
Trigger sprayer with multi-function piston does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Trigger sprayer with multi-function piston, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trigger sprayer with multi-function piston will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1394424