Hopper loading directly insertable horizontally mounted cylindrical segmented bore pleated filter system for rotary broom sweepers
Patent 4802983 Issued on February 7, 1989. Estimated Expiration Date: 
February 4, 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.
February 4, 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 2374756 2475808 3206178 3307336 3317043 3493113 3510002 3786920 Compact dust filter system Bacteria filters with transparent housings InventorApplicationNo. 07/148149 filed on 02/04/1988US Classes:55/302, Pneumatic reverse flushing210/497.2, Filter blank55/498Spiral or cylindricalExaminersPrimary: Hart, Charles N.Attorney, Agent or FirmInternational ClassesB01D 46/24 (20060101)B01D 50/00 (20060101) E01H 1/00 (20060101) E01H 1/08 (20060101) AbstractDisclosed is an air filtration and filter mounting system. The system includes a clean air plenum having a wall with an inlet opening therein. A pair of substantially parallel tension bars are connected to and extend perpendicular to the plenum wall spaced on opposite sides of the plenum inlet. A gimbal plate is slidingly mounted on the tension bars. A filter element is positioned between the tension bars and between the gimbal plate and the plenum wall about the inlet opening. A clamping bar is fixedly connected to the tension bars outward of the gimbal plate and a screw is threadedly engaged with the clamping bar to urge the gimbal plate into clamping engagement with the filter element. | |
