Roof drain
US4230346A · kind A · utility
11Cited by
19References
4Claims
0Family size
Inventor
Key dates
| Filing date | Sep 6, 1977 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Sep 6, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D2013/044
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roof drain, for receiving rain water from a roof and conducting it to a drain pipe, includes a drain body made from polyurethane foam and having a flange integral with and adjacent to the inlet end of such drain body. A collar which makes sealing connection with the roof covering is attached to the drain body flange by molding the drain body in contact with a preformed collar of vinyl acetate ethylene material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.