Plural fluid proportioning apparatus
US4064891A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1975 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Dec 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7908
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Apparatus is provided for admixing a relatively small quantity of one fluid with a larger quantity of another fluid in a proportion which remains relatively constant over a wide range of demand flow rates for the mixed fluids. The apparatus comprises a body having an inlet cavity and an outlet chamber in fluid communication therewith through an annular port. A disc-like valving member is mounted for displacement vertically in the chamber into elevations which depend on the rate at which a primary fluid flows through the annular port. A reservoir for a secondary fluid has an upwardly-open orifice and is located interiorly of the annular port. The valving member has a central tapered plug which depends into the reservoir-orifice, and the valving member is weighted so as to be biased downwardly by a constant pressure into a normally-closed position blocking fluid flow through the annular port. The elevation of the valving member in the chamber locates the plug relative to the orifice to vary the effective flow area of the orifice to insure the mixing of a metered amount of the secondary fluid with the primary fluid throughout a wide range of demand flow rates. A balanced pressure bypa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.