Multi-media filtration system with reusable and demountable filter cartridge
May 14, 2017. 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 3333703 Holder for annular filter Filter element having removable filter media member Filter head with integral priming pump and valved bypass passage Quick connect/disconnect oil filter Fluid filter cartridge with replaceable filter element High strength filter Liquid filter Fluid filter assemblies Filter assembly InventorAssigneeApplicationNo. 855271 filed on 05/14/1997US Classes:210/440, Inlet and outlet at same end210/441, Attached to casing210/450, Gasket within casing or spaced removable end members210/457With central pervious tubular receiverExaminersPrimary: Savage, Matthew O.Attorney, Agent or FirmForeign Patent References
International ClassB01D 035/34AbstractA spin-on filter unit for filtering liquids which may be readily disassembled and which utilizes a perforated center tube support disposed within a housing canister having both an open end and a closed end, a mounting head assembly which includes a bayonet connector mechanism adapted for releasable engagement with the open end of the housing canister, and a spring mechanism mechanism which acts upon the center support tube to urge the mounting head assembly bayonet connection mechanism into releasable engagement with the open end of the housing canister after rotation of the mounting head assembly about its center axis relative to the housing canister.Other References
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