Size reduction machine having an external gap adjustment
US4759507A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J19/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A series of screens for use with a size reduction machine have a tapered apertured wall formed into a frusto-conial shape, with an open wide end and a narrow closed end. All screens of a particular series have a cylindrical section, the same interior depth, outside diameter and angle of the tapered wall. Despite variations in the material wall thickness, screens of the same series are interchangeable on a size reduction machine and the gap can remain constant without any adjustment to the impeller. Further, a size reduction machine has means external to the machine providing for infinite adjustments to the gap. With previous machines, each time that a screen of a different thickness was used, it was necessary to make an adjustment to the gap in order to maintain the same gap. Further, when an adjustment to the gap is required, that is accomplished by removing the screen and impeller from the machine and inserting spacers onto the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.