Dispensing device

Details Dispensing device Dispensing device

1988-02-29

1989-07-18

Rolla, Joseph J.

Dispensing

With discharge assistant

Container with follower

222326, 74128, 92 29, B67D 542

Patent

active

048485985

ABSTRACT:
A dispensing device of the hand-help pump type has an internal piston which is pulled up by a rod passing through the piston, which rod is moved by an actuator. When the contents of the piston are emptied, in order to attach a refill, a dog release mechanism operates to release the dogs which, in normal use when the device is full, function to prevent the piston from being drawn downwardly so that the piston can be removed to allow attachment of the refill which has a new piston.

REFERENCES:
patent: 742912 (1903-11-01), Schwechler
patent: 766861 (1910-08-01), Rubly
patent: 1114832 (1914-10-01), Whitney
patent: 2582156 (1952-11-01), Peterson
patent: 2604858 (1952-07-01), Bosa
patent: 3174657 (1965-03-01), Sandholm
patent: 3884396 (1975-05-01), Gordon et al.
patent: 4461403 (1984-07-01), Prahs

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