Method and apparatus for gas flow control in a cryogenic freezer
US4800728A · kind A · utility
14Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D3/11
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Method and apparatus for controlling gaseous cryogen flow through a continuous tunnel type freezer wherein the cryogen and product to be frozen travel in counterflow heat exchange relation to minimize egress of cryogen from, or ingress of ambient air into the product discharge opening in the freezer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.