Anti-siphon mixing valve
US5462079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Dec 5, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87619
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hot and cold water mixing valve for use with faucets, shower/tub controls and other plumbing fittings includes a sleeve having a hot water inlet and a cold water inlet spaced therefrom and an outlet axially spaced from the inlets. There is a stem movable within the sleeve to control water flow from the inlets to the outlet. There is a water passage between the exterior of the stem and the interior of the sleeve and there is an axially extending air passage within the stem having an outer end in communication with air at ambient pressure. There are air outlets in the stem intermediate its ends which connect the air passage with the exterior of the stem. The stem exterior and the sleeve interior cooperate to provide an anti-siphon device to draw air from the air outlets into the water passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.