Pressurizable container assembly and piston member therefor

Details Pressurizable container assembly and piston member therefor Pressurizable container assembly and piston member therefor

1997-01-24

1998-07-14

Bomberg, Kenneth

Dispensing

With discharge assistant

Insertable cartridge or removable container

222389, 222386, B65D 8860

Patent

active

057791074

ABSTRACT:
There is disclosed a piston member for a container comprised of a piston body of a diameter smaller by at least about 0.3 cm. (0.012") than the diameter of the inner surface of the container and formed with an upwardly and outwardly extending conically-shaped wiping wall portion having a wiping edge in sliding contact with the inner surface of the container to permit flexing of the wiping edge over imperfections, such as dents or bumps in the container thereby substantially eliminating potential for piston member stall as well as more efficacious product dispensing.

REFERENCES:
patent: 3275200 (1966-09-01), Livingstone
patent: 3901416 (1975-08-01), Schultz
patent: 4234108 (1980-11-01), Diamond
patent: 5400926 (1995-03-01), Keller
patent: 5522526 (1996-06-01), Delaforcade et al.
patent: 5577641 (1996-11-01), Delaforcade et al.
patent: 5680967 (1997-10-01), Dnag et al.

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