Pressure balancing valve
US4174726A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1976 |
| Grant date | Nov 20, 1979 |
| Priority date | — |
| Expiry date | Nov 5, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2521
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A valve assembly for use in building water systems where a hot and cold water supply line pressures vary, and having separate valve means for regulating the hot and cold water pressures. Independently mounted pressure equalizing means operated by the supply water pressures are connected to operate each of the valve means responsive to any pressure differential caused by changes in the supply pressures, to change the water pressure regulated by each of the valve means, with the magnitude and sense of the change reducing any such differential to zero and equalizing the pressures. The separate valve means and pressure equalizing means are contained in a cartridge having separate supply water chambers and hydraulic fluid chambers associated with each water chamber. A pair of movable walls are mounted in the cartridge each one separating one water chamber from the associated hydraulic fluid chamber, and the cartridge has restricted orifice means interconnecting the hydraulic fluid chambers to equalize the pressures therein while dampening movable wall oscillations due to changes in water chamber pressure. Each movable wall operates one of the valve means, so that the water pressure in o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.