Coaxial pump mixer
US4176972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Aug 9, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F2025/912
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A thin, circular mixing apparatus for receiving from separate sources (1) dry calcined gypsum powder and (2) the liquid ingredients of the core of a gypsum wallboard, with the liquids being fed to a small diameter radially inward centrifugal pump portion, the dry ingredients being fed to a medium diameter circular portion into which the centrifugal pump elements continually force the liquids in an outwardly spiralling path and having a radially outermost circular portion into which the mixture is further forced in a continued outwardly spiralling path and out from which the mixture is discharged, between rotating radially outwardly projecting teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.