Metal working machine liquid filtering device with coalescer, filter, and time delayer
June 17, 2008. 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 3087620 3690466 Three-phase separator Oil extractor Vertical tube liquid pollutant separators Liquid separating and recycling Liquid filtering apparatus Relieving pressure differential in vacuum filter Vacuum-sewage-collection system Method for filtering contaminated liquids InventorsAssigneeApplicationNo. 07/208089 filed on 06/17/1988US Classes:210/104, Responsive to material level210/105, With control for auxiliary liquid inlet210/110, With separator inlet control210/111, Responsive to prefilt accumulation or filter clogging210/114, By treated liquid accumulation210/117, Check valve controlled210/140, Preparation for treating operation210/259, Diverse210/305, Baffle preceding or within sediment trap210/401Superimposed on additional moving supportExaminersPrimary: Fisher, Richard V.Assistant: Nessler, Cynthia L. Attorney, Agent or FirmInternational ClassesB01D 17/04 (20060101)B01D 29/09 (20060101) AbstractVersatile filtering apparatus is provided, particularly for processing liquid or coolant used with metal-working machines. The apparatus is adaptable for processing coolant in a wide variety of coolant systems to meet a variety of requirements of metal-working machines in a plant. The apparatus includes a dirty liquid tank in side-by-side relationship with a clean liquid tank, a coalescing unit, a filtering unit, an automatic supply or fill valve for supplying liquid to the apparatus from the coolant system, and an automatic discharge valve for supplying processed liquid from the apparatus back to the coolant system. The coalescing unit separates free oils from the liquid and the filtering unit separates solid particles from the liquid. The processed liquid is then discharged back to the coolant system along with fresh coolant. The overall processing time, along with the time for operating the coalescing unit and the filtering unit, can be changed to adapt the filtering apparatus to meet the particular requirements of particular coolant systems.Field of SearchSkimmingSuperimposed on additional moving support Unrollable Baffle preceding or within sediment trap Removable cartridge or hand-manipulated container Diverse Responsive to material level With control for auxiliary liquid inlet Discharge of treated material With separator inlet control Responsive to prefilt accumulation or filter clogging By treated liquid accumulation Check valve controlled Check valve Maintaining stream pressure or flow WITH TIME CONTROL Of additional fluid Preparation for treating operation | |
