Surgery – Respiratory method or device – Ozone or ion generation
Patent
1979-12-13
1982-08-17
Howell, Kyle L.
Surgery
Respiratory method or device
Ozone or ion generation
128214C, 128214E, 250574, 250564, 250565, 250204, A61M 514, G08B 2100
Patent
active
043444296
ABSTRACT:
In a flow metering apparatus, a bubble detector for detecting bubble formation in tubing includes a light source and first and second light detectors. The first light detector is positioned on the opposite side of the tubing from the light source such that the light transmitted through the tubing to the detector is dependent on the focusing effect of fluid in the lumen of the tubing. A control circuit responsive to the output of the detector interrupts operation of the metering apparatus when the light transmitted through the tubing falls below a predetermined minimum level. The second light detector is positioned at an angle to the light path between the light source and the first detector so as to receive increased light from the light source in the absence of the focusing effect of fluid in the tubing. Intensity control means responsive to the output of the light source with increased incident light at the second detector to increase the responsiveness of the bubble detector to the absence of fluid in the tubing.
REFERENCES:
patent: 3177757 (1965-04-01), Polanyi
patent: 3192473 (1965-06-01), Marsh
patent: 3461856 (1969-08-01), Polanyi
patent: 3518437 (1970-06-01), Riggs
patent: 3618061 (1971-11-01), Livers
patent: 3935876 (1976-03-01), Massie et al.
patent: 3987303 (1976-10-01), Stoft et al.
patent: 4003707 (1977-01-01), Lubbers et al.
patent: 4014010 (1977-03-01), Jinotti
patent: 4038982 (1977-08-01), Burke et al.
patent: 4075462 (1978-02-01), Rowe
patent: 4114144 (1978-09-01), Hyman
Gupton John E.
Shim Norman
Baxter Travenol Laboratories Inc.
Cummings Eugene M.
Howell Kyle L.
Kirby, Jr. John P.
Price Bradford R. L.
LandOfFree
Bubble detector with feedback circuit for improved sensitivity does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bubble detector with feedback circuit for improved sensitivity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bubble detector with feedback circuit for improved sensitivity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-182565