Method and apparatus to control dispensing rate of a solid product with changing temperature
US7597861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2005 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | May 15, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F21/4021
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispenser (10) uses first and second flow controls (70, 73). The flow controls maintain first and second flow ranges independent of diluent pressure within a pressure range, wherein the use solution's concentration is maintained over the pressure range. A third flow control (75) may also be utilized in a third diluent passageway for maintaining a third flow range independent of the diluent pressure within the pressure range. A bypass valve assembly (41) is operatively connected to the third incoming diluent passageway. The bypass valve has a temperature control valve. The temperature control valve having a bypass passageway, wherein additional diluent is added to the use solution, thereby controlling the use solution's concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.