Suction control filter system for swimming pools
Patent 4997558 Issued on March 5, 1991. Estimated Expiration Date: 
July 1, 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.
July 1, 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 883467 3061100 3616468 3668712 3668714 3815160 Swimming pool gutter Vacuum filter for swimming pools Patent #: 4127485 InventorApplicationNo. 214694 filed on 07/01/1988US Classes:210/143, AUTOMATIC CONTROL4/510, Gutter210/169, Aquarium or swimming pool210/278, Multi-way valve unit210/279, With embedded fluid distributor210/416.2For aquarium or swimming poolExaminersPrimary: Jones, W. GaryAssistant: Savage, Matthew O. International ClassE04H 003/20AbstractA suction control filter system for swimming pools is provided, in which the vacuum filter of the water recirculation system features positive suction backwash of the filter during cleaning.Field of SearchAquarium or swimming poolBackwash or blowback means Flow controller external of closed casing Multi-way valve unit With embedded fluid distributor Prefilt flow distributor or diverter Particular liquid receiving means or foraminous bed retainer For aquarium or swimming pool AUTOMATIC CONTROL Gutter Including weir | |
