Flow monitoring device

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

604246, 73204, A61M 500

Patent

active

046278400

ABSTRACT:
The flow monitoring device is used with a pump casing on an outflow tube having a passageway therethrough with a wall thereabout. A solenoid pump communicates with the passageway for providing pulsatile liquid flow therethrough. A reduced-in-thickness area along the wall of the casing or outflow tubing has an outside surface establishing a site to measure pulsatile flow along an adjacent inside surface. A thermistor is mounted on the outside surface of the wall area for sensing the temperature thereof in response to pulsatile flow therebeneath. The thermistor is electrically energized at a predetermined level. A control circuit regulates the input of electrical energy to the thermistor for predetermined time periods. The control circuit includes a sample and hold circuit and a reset switching circuit responsive to the pump activation for supplying thermistor power after pumping begins. An amplifier in the control circuit compares differences in the input power to the thermistor during a selected time interval to measure the pulsatile flow rate through the passageway.

REFERENCES:
patent: 3199348 (1965-08-01), Salera
patent: 3279251 (1966-10-01), Chanaud
patent: 3316902 (1967-05-01), Winchel et al.
patent: 3326040 (1967-06-01), Walsh
patent: 3535927 (1970-10-01), Mahon et al.
patent: 3754201 (1973-08-01), Adams
patent: 3800592 (1974-04-01), Jones, Jr.
patent: 3871229 (1975-03-01), Fletcher
patent: 3898637 (1975-08-01), Wolstenholme
patent: 3931736 (1976-01-01), Elmstead
patent: 4003379 (1977-01-01), Ellinwood, Jr.
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4450719 (1984-05-01), Nishimura et al.
Lilley et al, "The Use of Electronic Prediction to Achieve Fast Response from a Simple Thermal Mass Flowmeter", in Journ. of Physics E, vol. 8, #1, pp. 3-5, 1/75.
Bulletin 600 published by CGS/Datametrics, a Division of CGS Scientific Corporation of Watertown, Mass., "Heat Sensor Finds Wide Applications in Fluid Flow Measurements", 1970.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Flow monitoring device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flow monitoring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow monitoring device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1383641

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.