Spiral cryogenic freezer
US4866946A · kind A · utility
19Cited by
11References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G2207/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method and apparatus for controlling movement of the refrigerated atmosphere (e.g. gaseous cryogen) contained inside the insulated chamber of a spiral type freezer out of, or ambient atmosphere into, the lower opening of the freezer by establishing a positive pressure of ambient atmosphere adjacent the inlet opening of the freezer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.