Regulated fluid pump

Details Regulated fluid pump Regulated fluid pump

1973-08-02

1976-04-27

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417411, F04B 4906

Patent

active

039531520

ABSTRACT:
A system for the linear control and calibration of the flow of fluid through a pump in which the pump has a linear flow rate-to-fluid propeller speed relationship over a range of flow rates. A DC motor driving the fluid propeller has a linear drive speed-to-armature voltage relationship over a corresponding range of drive speeds. The voltage applied to the armature is regulated DC, the value of which provides an indication of the fluid flow rate. The system has particular utility in portable air pollutant measuring applications where a measured volume of air is pumped through a filter tube filled with a porous solid sorbent which is later subjected to chemical analysis.

REFERENCES:
patent: 3410059 (1968-11-01), Garnier
patent: 3439622 (1969-04-01), Welty et al.
patent: 3501899 (1970-03-01), Allen
patent: 3502026 (1970-03-01), Toyoda

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