Automatic control for liquid flow
Patent 4018362 Issued on April 19, 1977. Estimated Expiration Date: 
April 19, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 19, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2604249 3209795 3252623 3604419 3648694 3655095 3887110 InventorApplicationNo. 629239 filed on 11/06/1975US Classes:222/55, Constant weight, volume or pressure control by output604/65, Material flow varying means controlled by condition responsive sensor604/253Having drip sensorExaminersPrimary: Tollberg, Stanley H.Assistant: Lane, Hadd Attorney, Agent or FirmInternational ClassB67D 005/08AbstractAutomatic regulation system of a flow of liquid, which system comprises an electronic liquid flow control circuit connected to a liquid flow regulation device which it actuates, the said electronic circuit being characterized in that it comprises a drop counting circuit connected to a comparator circuit which comprises a bistable circuit which is itself connected on the one hand to alarm circuits and on the other hand to a monostable circuit, the magnitude of the pulse of which is compared with the magnitude of the pulse of the bistable circuit by means of a comparator circuit to which the bistable and monostable circuits are connected. Said system is used for automatic regulation of the flow of a perfusion liquid. | |
