Beveled lobe anti-skid grating
Patent 4343119 Issued on August 10, 1982. Estimated Expiration Date: 
December 22, 2000. 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.
December 22, 2000. 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 ReferencesInventorAssigneeApplicationNo. 06/218496 filed on 12/22/1980US Classes:52/180, Perforate structure having twisted element or particular surface15/238, Mats29/896.6, Multiperforated metal article making413/15, Forming discontinuous frangible fracture line (e.g., push-in type with hinged tear tab)428/132, Struck out portion type428/134, Noncircular aperture (e.g., slit, diamond, rectangular, etc.)428/4, BOW, POMPOM OR ROSETTE428/597, Struck-out portion type428/60, Beveled, stepped, or skived in thickness52/673, Perforated72/327With endless cutting edgesExaminersPrimary: Lesmes, George F.Assistant: Thomas, Alexander S. Attorney, Agent or FirmInternational ClassesE01D 19/12 (20060101)E04C 2/42 (20060101) E04C 2/30 (20060101) E04F 11/16 (20060101) E04F 11/02 (20060101) AbstractAn improved anti-skid tread or grating (10) design is provided with gripping members or rosettes (30) having a plurality of upstanding individual lobes (36) which are configured in such a way and project high enough to provide an excellent gripping surface. The lobes (36) of the design are self-cleaning, and have non-continuous gripping edges at their crests (40) that accommodate a greater build up of ice or mud without clogging the grating (10). | |
