Apparatus for blending chemicals with a reversible multi-speed pump
US5340210A · kind A · utility
34Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1992 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Feb 25, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F2101/2204
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for mixing or blending chemicals includes a dedicated pump for each type of chemical to be blended, such as one pump for water-based chemicals and another pump for oil-based chemicals. Each pump preferably operates in a fast speed when delivering the majority of a particular chemical into a vending vat. When the desired amount of a chemical has almost been pumped into the vat, the pump switches to a slower speed to add the remaining amount. Then, the pump is reversed to clear the chemical from the line so that another similarly based chemical can be pumped through the line into the vat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.