Pumping dispenser for viscous liquids

Details Pumping dispenser for viscous liquids Pumping dispenser for viscous liquids

2007-06-19

2010-06-22

Shaver, Kevin P (Department: 3754)

Dispensing

Collapsible wall-type container

With wall-collapsing means

C222S105000, C222S189100, C222S209000, C222S211000, C222S401000, C222S464100, C137S212000, C417S118000, C417S473000

Reexamination Certificate

active

07740151

ABSTRACT:
A hand operated air pump apparatus comprising an internal bellows in communication with an outer bellows wherein variable force on air pump forces compressed air through a discharge valve into a annulus between a bottle and a flexible bladder wherein said pump is attached upon a container or bottle like vessel wherein pumping action forces from bottle highly viscous substances, that may contain solid or abrasive particles, through a discharge spout without internal substance being contaminated by air or other environmental factors thus allowing for an improved method of removing all contents within a container with greater ease.

REFERENCES:
patent: 2823953 (1958-02-01), McGeorge
patent: 4020978 (1977-05-01), Szczepanski
patent: 4062475 (1977-12-01), Harris et al.
patent: 4159790 (1979-07-01), Bailey
patent: 5740949 (1998-04-01), Park
patent: 6460740 (2002-10-01), Simard

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