Cryogenic freezer
US4229947A · kind A · utility
25Cited by
11References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Aug 6, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D3/11
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A cryogenic freezer of the elongated, tunnel-type is disclosed in which a centrally located blower recirculates injected cryogenic refrigerant at extremely high velocities through a pair of minimum size product contact chambers. In one preferred embodiment, the cross-sectional area of the product contact chamber is variable so as to maintain minimum sizes for products of different height.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.