Air-jet mill and associated pregrinding apparatus for comminuating solid materials
US4807815A · kind A · utility
4Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Jan 29, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C19/061
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air-jet mill provided with pregrinding chambers and inner sizer suitable for fine grinding (below 10 .mu.), for cryogenic grinding and also for surface treatment during grinding of hard, elastic and/or thermoplastic materials. During operation there are no moving components to be exposed to heavy wear, and an inner sizer, forming an integral part of the grinding space, uses the energy left after grinding in the system to enable a sharp sizing or separation of fine fractions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.