Combination cryogenic and mechanical freezer apparatus and method
US5170631A · kind A · utility
22Cited by
16References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | May 23, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G2207/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Combined cryogenic and mechanical refrigeration freezer utilizing an open spiral conveyor for transporting food to be frozen through a first cryogenic zone enclosed by a secondary housing and then through a mechanically refrigerated zone subjected to circulating air cooled by mechanical refrigeration and cryogenic vapor from the first cryogenic zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.