Pump actuator with plastic spring

Details Pump actuator with plastic spring Pump actuator with plastic spring

2000-08-10

2001-05-01

Derakshani, Philippe (Department: 3754)

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

C222S321700

Reexamination Certificate

active

06223954

ABSTRACT:

BACKGROUND AND SUMMARY OF THE INVENTION
Small finger operated pumps are commonly used for dispensing liquids, especially personal care products, from small hand held containers. These pumps and their containers are conventionally made of plastic and a typical pump, its container and contents are sold together. The container is filed with a personal care product such as a cream, soap, cosmetic or other liquid or gel. The pump and container are usually disposed of when the contents of the container are consumed, making the entire product a consumable item. Recycling the pump and its container has been difficult because the pump conventionally a includes a metal return spring.
This invention is directed to a plastic spring for a disposable plastic container having a finger operated pump which is attractive, functional and disposable.
An object of this invention is a plastic spring which may be adapted for installation on a conventional personal products container having a finger operated pump.
Another object of this invention is a plastic spring which is sufficiently attractive to be mounted where it is visible on dispensing container.
Yet another object of this invention is a compressible plastic spring that may be formed by injection molding.
Still another object of this invention is a compressible plastic spring that may be integrally molded with a container cap.
A further object of this invention is a compressible plastic spring that may be molded integrally with the pump actuator to facilitate assembly of the pump.


REFERENCES:
patent: 2597650 (1952-08-01), Maehren
patent: 4471893 (1984-09-01), Knickerbocker
patent: 5042696 (1991-08-01), Williams
patent: 5447257 (1995-09-01), Dark
patent: 5673824 (1997-10-01), Evans
patent: 5924603 (1999-07-01), Santagiuliana

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