Dispensing – With discharge assistant – Container with follower
Patent
1977-04-25
1979-01-02
Reeves, Robert B.
Dispensing
With discharge assistant
Container with follower
141 3, 222389, 222518, B65B 304, B65D 8314
Patent
active
041323327
ABSTRACT:
Containers for dispensing pressurized fluids, such as aerosols, comprise a space for the fluid and a wall movable automatically to reduce the volume of the space as the contents become exhausted, a vacuum chamber being arranged in communication with at least a part of the movable wall in such a manner as to maintain the pressure on the pressurized fluid at a substantially constant level. A spring may be provided to act on the movable wall so as to apply pressure to the pressurized fluid, in which case the vacuum chamber is arranged to act in opposition to the spring and to reduce its effect as the spring extends. Alternatively the spring may be omitted and the fluid space and vacuum chamber may be arranged to vary in volume in the same sense, the vacuum acting on the movable wall to apply pressure to the pressurized fluid.
REFERENCES:
patent: 1648163 (1927-11-01), Childs
patent: 1911972 (1933-05-01), Rose
patent: 2809774 (1957-10-01), Kaye et al.
patent: 3096001 (1963-07-01), Boe et al.
patent: 3268123 (1966-08-01), Spatz
patent: 3327906 (1967-06-01), Gomann
patent: 3468308 (1969-09-01), Bierman
patent: 3498506 (1970-03-01), Charrier
Bartuska Francis J.
Brown Charles E.
Reeves Robert B.
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