Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Patent
1975-02-20
1977-05-24
Croyle, Carlton R.
Pumps
Condition responsive control of pump drive motor
With condition responsive control of pump fluid valve
137209, 137211, F04B 4900, F04F 118
Patent
active
040252345
ABSTRACT:
Apparatus for supplying liquid at a constant but regulable pressure comprising a storage vessel having an inlet and an outlet, the outlet being adapted for connection to a utilization device which is to be fed with liquid at constant pressure. An inlet conduit is connected to the inlet of the vessel and a pump is connected in the inlet conduit for pumping liquid from a liquid supply to the inlet of the vessel. A valve is inserted in the inlet conduit upstream of the pump for preventing reverse flow of liquid to the liquid supply when the pressure in the utilization device exceeds the static pressure due to the liquid height in the vessel. The valve is coupled to the pump to be opened and closed in accordance with starting and stopping thereof. The vessel includes an air inlet duct including a regulating device for adjusting the air pressure in the air chamber of the vessel from zero to a predetermined maximum. The air inlet duct maintains a constant air pressure in the vessel to maintain the liquid therein at a given constant pressure.
REFERENCES:
patent: 2431640 (1947-11-01), Gordon
patent: 2988002 (1961-06-01), Dodd
patent: 3002460 (1961-10-01), Ward
patent: 3007414 (1961-11-01), Long et al.
patent: 3035522 (1962-05-01), Lung
patent: 3225696 (1965-12-01), Brigman
patent: 3342136 (1967-09-01), Domecki
Croyle Carlton R.
La Pointe G. P.
Mecano Quimica S.A.
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