Mixing valves with ceramic flow control elements
US6263899A · kind A · utility
7Cited by
5References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2000 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Mar 3, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2514
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A novel non-scald mixing valve is provided of the type that utilizes a pressure-balancing piston to sense a change in the set flow conditions and automatically open or closes orifice to compensate for the change, the valve being characterized by the use of ceramic valving elements to provide both the valve shut-off function and the temperature-ratioing function. The ceramic valving elements fulfill the requirement that the positive shut-off function must be accomplished up-stream of the sensing pressure-balancing piston in order to avoid the use of check valves in the hot and cold water supplies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.