Multi-stage filter frame assembly
Patent 5183488 Issued on February 2, 1993. Estimated Expiration Date: 
April 30, 2012. 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 30, 2012. 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 3243943 3774377 Replacement filtered soffit ventilator Patent #: 4762053 InventorAssigneeApplicationNo. 876177 filed on 04/30/1992US Classes:55/320, Deflector and fibrous, filamentary, particulate solids, or cohesive sheet filter type55/483, With framework for edge to edge relation55/486, Plies or layers of different characteristics or orientation55/493, Hinged or pivoted retainer or clamp on backing frame or in flow line55/513Resilient securing meansExaminersPrimary: Hart, Charles N.Attorney, Agent or FirmInternational ClassB01D 046/02AbstractA multi-stage filter assembly having a number of filter media layers, at least one of which is removably mounted to a filter frame, utilizes a retaining clip to hold the filter media in place. The retaining clip is in the form of an elongated strip that extends across the filter media and has its ends disposed within channels formed in the frame. The elongated strip is provided with a centrally located bend that causes the ends of the clip to be urged upwardly into engagement with the framework and causes a portion of the clip to be urged downwardly into engagement with the filter media.Field of SearchPLURAL SERIAL BASICALLY DIVERSE SEPARATING MEDIADeflector and fibrous, filamentary, particulate solids, or cohesive sheet filter type With framework for edge to edge relation Plies or layers of different characteristics or orientation Hinged or pivoted retainer or clamp on backing frame or in flow line Resilient attaching means Resilient securing means With additional support means not positively engaged or joined to media (e.g., across face of filter) | |
