Dispensing – Automatic control – Material level control
Patent
1990-04-17
1991-07-23
Huppert, Michael S.
Dispensing
Automatic control
Material level control
2221291, 137202, B67D 508, F16K 2400
Patent
active
050336460
ABSTRACT:
A liquid dispensing system including an air evacuating apparatus is disclosed. The liquid dispensing system includes a dispensing mechanism and an air evacuating apparatus. The air evacuating apparatus includes a primary pump, a reservoir, an inlet in the reservoir operative to introduce liquid into the reservoir, an outlet in the reservoir operative to transport liquid from the reservoir to the primary pump, a level sensor operative to ascertain the level of liquid in the reservoir, an auxiliary pump, and a controller responsive to output from the level sensor to selectively control operation of the auxiliary pump to remove gas from the reservoir. The primary pump is operative to transport a dispensable liquid from a storage container to the dispensing mechanism.
REFERENCES:
patent: 2565045 (1951-08-01), Ray
patent: 3054419 (1962-09-01), Farrell
patent: 3057518 (1962-10-01), Japp
patent: 3112844 (1963-12-01), Keller et al.
patent: 3324874 (1967-06-01), Armstrong et al.
patent: 3340887 (1967-09-01), Peters
patent: 4356937 (1982-11-01), Simon et al.
patent: 4730638 (1988-03-01), Hazelton
patent: 4938387 (1990-07-01), Kervefors et al.
McCann Gerald P.
Verley Donald
DeRosa Kenneth R.
Huppert Michael S.
McCann's Engineering and Manufacturing Co.
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