Sound activated safety system for a reduction mill
US7048212B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 11, 2003 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Aug 27, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C23/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a sound activated detection system disposed within the conveyor and/or hammer roll area of a reduction mill for detecting unshredable materials fed into the machine. More specifically, an embodiment of this invention comprises a unshredable debris detector disposed in operative relationship in the material input path and includes a transducer, preferably a piezoelectric crystal, acoustically coupled to a sensing surface disposed transversely across a portion of the input path. Alternative embodiments may include one or more accelerometers, microphones, or other vibration or acoustic sensors either alone or in conjunction with the transducer for detecting the unshredable material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.