Refillable pump dispensing container

Dispensing – With discharge assistant – Insertable cartridge or removable container

Patent

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Details

222386, G01F 1104

Patent

active

052956156

ABSTRACT:
A dispensing container is provided for delivery of viscous flowable materials such as toothpaste. The container includes a cylindrical upper body for containing the viscous flowable material and is fitted with an orifice for allowing egress thereof. At a lower end of this body is fitted a piston sealingly slidable within the upper body. The piston is formed from a diaphragm and a skirt of circumferentially concave form surrounding the diaphragm and sealingly slideable against an inner wall of the upper body. Within the piston is a cavity downwardly open. A cylindrical lower body is received telescopically within the cylindrical upper body. A boss portion is formed on top of the lower body and extends into the piston cavity to establish a snug, frictional fit. When the container is exhausted of viscous flowable material, the upper body can be discarded and a refill of similar construction can be mounted on the reusable cylindrical lower body.

REFERENCES:
patent: 2085446 (1937-06-01), Philippe
patent: 2655289 (1953-10-01), Peal
patent: 2661126 (1953-12-01), Spencer
patent: 4205766 (1980-06-01), White
patent: 4220261 (1980-09-01), White
patent: 4331267 (1982-05-01), Duncan et al.
patent: 4742940 (1988-05-01), Wilkinson
patent: 4819836 (1989-04-01), Meckenstock
patent: 4934570 (1990-06-01), Bamberger et al.
patent: 5094496 (1992-03-01), Gayle et al.

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