Adjustable filter frame and grid
Patent 5476526 Issued on December 19, 1995. Estimated Expiration Date: 
May 13, 2014. 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.
May 13, 2014. 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 3076303 3509696 3774377 Method and apparatus for user sizable furnace filter and holder Multi-stage filter frame assembly Adjustable air filter Adjustable air filtering device Patent #: 5364458 InventorAssigneeApplicationNo. 242370 filed on 05/13/1994US Classes:55/496With adjustable connector or size adjusting meansExaminersPrimary: Bushey, C. ScottAttorney, Agent or FirmInternational ClassB01D 046/00AbstractThis invention is directed to a user-sizable filter grid and an adjustable interlocking filter frame and grid system suitable for use in heating and cooling systems. The user-sizable grid is adapted to interlock with an adjustable frame, thereby holding a filter in the grid/frame assembly, and includes at least one member extending across at least one of the length and width of the frame. The member has interlocks for engaging a flange on the frame, thereby securing the frame and grid together. Examples of different types of interlocks include indentations, pincher-like grippers and projections, with the indentations being the preferred form. In the preferred embodiment, the grid includes a plurality of horizontal and vertical members that intersect one another, with indentations being distributed along the intersecting members so that the adjustable frame may engage the interlocks while accommodating various standard filter sizes. | |
