Vented piston for barrier pressure containers

Details Vented piston for barrier pressure containers Vented piston for barrier pressure containers

1977-05-09

1979-01-16

Tollberg, Stanley H.

Dispensing

With discharge assistant

Container with follower

138 42, 239322, B67D 554

Patent

active

041345231

ABSTRACT:
A piston apparatus used with a barrier pressure container for dispensing flowable material. The portion of the piston which engages the material to be dispensed is vented to prevent the entrapment of gases when the container is being filled with the flowable material.

REFERENCES:
patent: 1320976 (1919-11-01), Black
patent: 1395302 (1921-11-01), Shalkop
patent: 2823915 (1958-02-01), Bourcier De Carbon
patent: 3227435 (1966-01-01), Greer
patent: 3255936 (1966-06-01), Healy et al.
patent: 3381863 (1968-05-01), Towns
patent: 3442424 (1969-05-01), Prussin et al.
patent: 3663071 (1972-05-01), Kates
patent: 4045938 (1977-09-01), Hansen

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