Trapezium-shaped aqueously-swelling concrete joint-sealing method
January 25, 2013. 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 908780 1559749 Poster supporting device Bentonite-gelled oil waterproofing composition Waterproofing barrier Aqueously-swelling water stopper and a process of stopping water thereby Waterproofing structure Waterproofing soil Uninhibited bentonite composition Uninhibited bentonite composition InventorApplicationNo. 008736 filed on 01/25/1993US Classes:52/396.02, Separator inserted prior to or during pouring of two adjacent concrete sections52/169.14, With waterproofing means; e.g., covering, coating, or lamina52/741.4, Sealing52/742.1Filling preformed cavityExaminersPrimary: Friedman, Carl D.Assistant: Kent, Christopher T. Attorney, Agent or FirmForeign Patent References
International ClassesE04B 001/62F02D 029/16 E04G 021/02 AbstractA shaped, water-expandable water-sealing article used for sealing an area between a first section of at least partially cured concrete and a second, adjacent section of substantially uncured concrete. The clay water sealing article is in the shape of a quadrilateral, preferably a trapezoid, and is disposed to bridge an area between the two sections of concrete. Upon hydration of the clay contained within the shaped water sealing article, expansion of the clay creates expansion forces extending from a corner of the article that is surrounded by the uncured concrete, wherein the corner has an included angle greater than 90°, preferably at least 100°. The expansion force developed by the expansion of the shaped water sealing article are absorbed by a substantially increased area of the uncured concrete as compared to expansion forces resulting from a clay-based water seal having a 90° included angle at the corner(s) surrounded by the uncured concrete. | |
