Drainage system for use in masonry block construction
US7216460B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 21, 2003 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Apr 11, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B1/7038
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drainage system comprises an elongate flashing member having a width similar to width of CMUs, to be received beneath a course of CMUs, in use. A layer of water permeable material is attached to an upper surface of the flashing member. The water permeable material includes a longitudinal portion extending longitudinally adjacent a rear edge of the flashing member and a plurality of transverse portions extending transversely from the longitudinal portion to a front edge of the flashing member. A plurality of blocks of water permeable material are provided, each being positioned above the layer of water permeable material and extending upwardly into cavities of CMUs, in use. The water permeable material of the layer and the blocks has a porosity sufficient to permit water to pass therethrough but substantially insufficient to permit mortar and debris to pass therethrough so that water in cavities of the CMUs drains through the transverse portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.