Fluid flow proportioning device
US6497244B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Apr 2, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86928
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid flow proportioning device including spool type valve elements (12,14,16) opposite end portions of which reciprocate in oppositely disposed and spaced apart valve block halves (100,102). So that the fluids being proportioned can never mix within the device despite the spool portions being devoid of sealing element within the cylindrical bores (13,15,17) in which they are slideable, central portions (21) of the valve elements are of smaller diameter than the diameters of the cylindrical bores (13,15,17) in which the valve elements are located, and resilient seals (105) encircle the portions (21) where they extend outwards from the valve block halves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.