Apparatus and methods for cryogenic treatment of materials
US5520004A · kind A · utility
Inventor
Key dates
| Filing date | Jun 28, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Jun 28, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D31/006
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
The invention includes a tunnel-conveyor section designed to process large-scale quantities of such materials as automobile tires for frangiation and embrittlement to low- or cryogenic-temperature levels for separation of fibrous and metal portions and subsequent granulation into fine-mesh particles. The system is also designed to subject food products to low- or cryogenic-temperature levels prior to for long-term storage and shipping as well. The system can also be used for freeze drying at very low temperatures (-380.degree. F. and lower) when nonconveyor procedures are used. The unit can be adapted as a horizontal-cylinder as well as a spiral or circular system for large-scale conveyor operations. Smaller systems can also be fabricated for laboratory or smaller-scale procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.