Fluid flow control system

Details Fluid flow control system Fluid flow control system

1981-04-15

1983-10-25

Howell, Kyle L.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

128DIG13, 222 58, A61M 500

Patent

active

044116497

ABSTRACT:
In a fluid flow control system a weight detector generates a signal representative of the weight of the fluid in the reservoir. A second signal is generated indicative of the desired fluid weight over time, and a first comparator produces an output indicative of the dissimilarity of the two signals. A programmed drop rate signal is modified by the first comparator's output to produce a desired drop rate signal. A drop detector produces a signal indicative of the actual drop rate. A second comparator is operative upon the desired drop rate signal and the actual drop rate signal to produce an output for operating the flow controller.

REFERENCES:
patent: 3329311 (1967-07-01), Goff et al.
patent: 3623052 (1971-11-01), Spiller
patent: 3655095 (1972-04-01), Kienitz
patent: 3999542 (1976-12-01), Shaw
patent: 4018362 (1977-04-01), Ubaud
patent: 4029094 (1977-06-01), Winicki
patent: 4098274 (1978-07-01), Ebling
patent: 4111336 (1978-09-01), Ward et al.
patent: 4137915 (1979-02-01), Kamen
patent: 4300552 (1981-11-01), Cannon

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