Fluid mixture and flow control valve
US4949753A · kind A · utility
Inventor
Key dates
| Filing date | Jun 12, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Jun 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87724
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for fluid mixing and flow control in showers, baths, and sinks. Three flow control valves are connected to a mixing chamber. Two of the valves control two inlet channels into the chamber, and the third valve controls the flow out of the chamber. The two inlet valves are linked to operate in unison in opposite phase (one opens when the other closes), providing a variable fluid mixing ratio. The complementary operation of these mixing valves causes their combined flow rate to remain constant while the mixing ratio varies. The third valve controls the total flow rate. This provides independent control of mixture and flow via a simple device. A circular dial can show the control arm positions clearly, allowing quick, absolute adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.