Drainage system for use in masonry block construction
US6912820B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 21, 2003 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jun 7, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B1/70
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drainage system for use in concrete masonry unit (CMU) wall construction comprises a tray unit of a size corresponding to size of CMUs, to be received beneath a course of CMUs, in use. The tray unit comprises opposite side flanges to abut a superjacent CMU and supporting a pan therebelow. A strip of water permeable material is attached to an upper surface of the pan and extends transversely beyond a front edge of the pan. A block of water permeable material is positioned above the pan and extends upwardly into a hollow core of a CMU. The water permeable material of the strip and the block has a porosity sufficient to permit water to pass there through but substantially insufficient to permit mortar and debris to pass there through so that water in a hollow core of a CMU drains through the strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.