Floor drain valve with resiliently mounted rigid flappers
US9139991B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2012 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Jan 31, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6988
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved floor drain valve for buildings, basements, exterior paved areas, and the like. The invention provides floor drain assemblies and check valves providing improved drainage performance, particularly where drainage is an irregular occurrence, and having unprecedented simplicity and reliability. Floor drains according to the invention comprise check valves having elastomeric hinge structures mounting relatively rigid flapper structures biased upwardly against sealing surfaces adapted for disposition within floor drains. Water entering the valve structure opens the flapper valves by gravitational forces downwardly against the relatively rigid flapper, and after passage of the water, the valve is elastomerically urged into the sealed position restricting back flow of gases from the downstream area of the drain conduit and permitting pressure testing of the downstream conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.