Liquid dispensing pump

Details Liquid dispensing pump Liquid dispensing pump

1984-03-07

1986-10-21

Rolla, Joseph J.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222340, 239333, B67D 540

Patent

active

046180770

ABSTRACT:
A liquid dispensing pump in the form of a trigger sprayer includes a thimble-shaped valving element containing inlet and outlet valves, and located within a cylindrical portion of the pump body. In one embodiment, a pressure accumulation chamber is defined between the pump body and the valving element, and a pump piston operates within the valving element and defines therewith a pump chamber in open communication with the accumulation chamber via spaced, flexible and extendable straps which interconnect the inlet and outlet valves for permitting a portion of the valving element to move axially into a discharge valve opening position. Vent valving is effected by either the pump piston or the valving element during inward reciprocation movement of the piston. In another embodiment, the sprayer is converted into a throttle pump by the provision of a pump piston which operates within the cylindrical portion of the pump body.

REFERENCES:
patent: 3527551 (1970-09-01), Kutik et al.
patent: 4046292 (1977-09-01), Corsette
patent: 4050613 (1977-09-01), Corsette
patent: 4072252 (1978-02-01), Steyns et al.
patent: 4191313 (1980-03-01), Blake et al.
patent: 4225060 (1980-09-01), Kutik et al.
patent: 4402432 (1983-09-01), Corsette
patent: 4489861 (1984-12-01), Saito et al.

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