Coal sizing grid
US5133852A · kind A · utility
5Cited by
11References
20Claims
0Family size
Inventor
Key dates
| Filing date | Jul 30, 1990 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jul 30, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B1/528
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A self-cleaning size-segregating grid for a coal crusher has two parallel clearing combs made up of rigid steel fingers which rotate through the grid bars to clear jammed materials therefrom. The propeller-like fingers are preferably staggered in angular orientation on their respective shafts. The shafts are spaced so that the swept volumes of the fingers overlap. A surge detector senses drive motor current as an indication of stall or incipient stall and automatically reverses the direction of rotation of the clearing combs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.