Deluge valve with valve seat drain
US9803755B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2015 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Nov 16, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/446
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve (10) for sealing and selectively opening a flow path from a water-filled inlet (210) to a dry outlet (220) includes a valve body (100) having a valve opening (230) surrounded by first and second annular valve seat regions (110, 120). A drainage channel (510, 512)) connects to a space between the first and second annular valve seat regions (110, 120). A plug (300) is displaceable between an open state and a closed state for closing the valve opening (230). The plug has a first annular seal (310) for sealing against first annular valve seat region (110) and a second annular seal (350) for sealing against the second annular valve seat region (120). The second annular seal (350) is a flexible seal deployed so that it closes prior to closure of the first annular seal (310). Second annular seal (350) is elastically deformed so as to be pressed into contact with the second annular valve seat (120) when the plug (300) reaches its closed state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.