Automatic flushing system for membrane separation machines such as reverse osmosis machines
Patent 3992301 Issued on November 16, 1976. Estimated Expiration Date: 
November 16, 1993. 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.
November 16, 1993. 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 3280978 3355382 3782556 3794169 3827976 3846295 InventorsAssigneeApplicationNo. 555640 filed on 03/05/1975US Classes:210/636, Including cleaning or sterilizing of apparatus210/140, Preparation for treating operation210/321.69, With membrane cleaning or sterlizing means (other than by filter movement or rotating agitator)210/652, Hyperfiltration (e.g., reverse osmosis, etc.)210/96.2With membraneExaminersPrimary: Spear, Frank A. Jr.Attorney, Agent or FirmAbstractAn automatic flushing and cleaning system for membrane separation machines such as reverse osmosis machines having plural modules or membranes. Cleaning may be by way of reducing the pressure to allow the membrane to relax, by the injection of air or inert gas to provide turbulence, and/or by injection of flushing liquid which may include chemical cleaning additives. Pumps, automatic valving, and pressure controls are provided, along with a complete timer operated electrical sequencing system whereby desired purging, flushing and cleaning cycles are automatically undertaken at periodic intervals or in response to one or more preferred conditions. | |
