Pumps – Condition responsive control of pump drive motor – Single motor control element responsive to means sensing...
Patent
1987-03-03
1990-04-24
Smith, Leonard E.
Pumps
Condition responsive control of pump drive motor
Single motor control element responsive to means sensing...
417 22, 417 53, 2101982, F04B 4900, B01D 1508
Patent
active
049195956
ABSTRACT:
Method and apparatus for compensating for the deficiency in fluid flow occurring during the refill and piston chamber pump-up cycle of a single piston fluid pump are disclosed. The period of time during which the outlet valve is closed and no fluid is being delivered to the system is determined and the pump is driven at a speed greater than the normal delivery speed for a period of time such that the quantity of excess fluid delivered approximates the quantity of fluid that would have been delivered during the refill and pump-up period had the pump been delivering fluid at its normal delivery rate.
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Catalog--Scientific Systems, Inc., Inside cover and pp. 1-15.
Likuski Robert K.
MacDonald Scott N.
Beckman Instruments Inc.
Harder Paul R.
May William H.
Scheuermann David W.
Smith Leonard E.
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