Dispensing – With discharge assistant – With material supply container and discharge assistant with...
Patent
1986-07-07
1987-11-24
Rolla, Joseph J.
Dispensing
With discharge assistant
With material supply container and discharge assistant with...
222309, 222148, 134169R, B67D 540
Patent
active
047082690
ABSTRACT:
A plunger-operated dispensing device for liquids includes a stock container for a liquid, at least one vertical dispensing cylinder with a dispensing plunger therein which can be moved in the axial direction of the dispensing cylinder between two end positions. The lower end of the cylinder is in communication with the stock container via a channel having a movable shut-off valve therein. The outside diameter of the dispensing plunger is smaller than the inside diameter of the dispensing cylinder is that a certain space is present between the wall of the cylinder and the plunger. Near its lower end the dispensing plunger is provided with a sealing ring for sealing the space between the cylinder wall and the plunger. The movement stroke of the dispensing plunger can be displaced in the direction of the lower end of the dispensing cylinder, such that, in the lower end position of the plunger, the sealing ring of the plunger reaches past the lower end of the dispensing cylinder. In this position cleaning liquid can flow from the stock container via the communication channel and past the shut-off valve to the space between the dispensing plunger and the wall of the dispensing cylinder, as a result of which a thorough cleaning of all the components becomes possible without the need to dismantle the dispensing device.
REFERENCES:
patent: 1874612 (1932-08-01), Peterson
patent: 3349973 (1967-10-01), Smith
patent: 3580302 (1971-05-01), Riesenberg
patent: 3693640 (1972-09-01), Wettlen et al.
patent: 4298575 (1981-11-01), Berglund
Noland Kenneth
Rolla Joseph J.
Stork Bepak B.V.
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