Pumps – Condition responsive control of pump drive motor – Plural pumps having separate drive motors – supply sources,...
Patent
1975-12-08
1977-09-13
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
Plural pumps having separate drive motors, supply sources,...
417 12, 417 46, 417 63, 417339, 417395, 251 9, F04B 4106
Patent
active
040478440
ABSTRACT:
A blood pumping system has a pair of integral flexible bodies each provided with an inlet and an outlet and disposed in open top cavities in a housing. The cavities have extensions holding inlet valves and outlet valves for opening and closing the inlets and outlets. A flexible diaphragm overlies the cavities and their extensions and is secured by a cover providing separate chambers over the inlet valves, the outlet valves and the bodies. Solenoid air valves are selectively energized to supply and exhaust the chambers to operate the valves and bodies. Switches responsive to the full and empty positions of the bodies govern the energization of the solenoids through control circuitry including a voltage controlled oscillator, a device for changing the frequency of the oscillator in accordance with the time of operation of at least some of the switches, and a device for ensuring at least a minimum rate of operation of the switches. Alarms are afforded after a predetermined number of switch operations have been missed.
REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 2383193 (1945-08-01), Herbert
patent: 2600493 (1952-06-01), Farris
patent: 2732807 (1956-01-01), Parsegian
patent: 3007416 (1961-11-01), Childs
patent: 3148624 (1964-09-01), Baldwin
patent: 3256825 (1966-06-01), Limpert et al.
patent: 3399693 (1968-09-01), Toma
patent: 3554672 (1971-01-01), Brandes
patent: 3610782 (1971-10-01), McGuire
patent: 3656873 (1972-04-01), Schiff
patent: 3741687 (1973-06-01), Nystroem
patent: 3811800 (1974-05-01), Shill
patent: 3938910 (1976-02-01), Douglas
Freeh William L.
Look Edward
Searle Cardio-Pulmonary Systems Inc.
LandOfFree
Blood pumping system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blood pumping system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blood pumping system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-270568