Dispensing – Automatic control – Cutoff operated by rate of flow responsive mechanism
Patent
1969-10-23
1976-02-17
Feinberg, Samuel
Dispensing
Automatic control
Cutoff operated by rate of flow responsive mechanism
B67D 508
Patent
active
039387054
ABSTRACT:
A system for delivering venturi aspirated dry powder at a predetermined rate in which one end of an exhaust tube is embedded in a vessel of dry powder and a pressure gas inlet tube has a return bend portion smaller than and extending into the embedded exhaust tube end. A miniature flow regulator is employed to normally deliver controlled pressure gas to the aspirator inlet, wherein delivered gas pressure increases as the gas pressure supply decreases. The regulator has a gas source passage containing a normally slightly opened valve whose stem is held in such slightly open valve position by an adjustably biased piston which allows the valve to close when a predetermined amount of pressure gas has built up on the regulator outlet side of the valve. There is provision for incorporation of a piston pulser intermediate the regulator and the aspirator, wherein an accumulator develops predetermined gas pressures to reciprocate a spring loaded piston valve between open and closed positions, permitting delivery of pressure gas surges to the aspirator.
REFERENCES:
patent: 818411 (1906-04-01), Bush
patent: 1797898 (1931-03-01), Cook
patent: 1929719 (1933-10-01), Werder
patent: 2081239 (1937-05-01), Klopfenstein
patent: 2097852 (1937-11-01), Wright et al.
patent: 2120034 (1938-06-01), Myers
patent: 3041970 (1962-07-01), Foster
patent: 3053273 (1962-09-01), Schreiner
patent: 3375032 (1968-03-01), Frantz
Edelberg Nathan
Erkkila A. Victor
Feinberg Samuel
Gibson Robert P.
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