Cryogenic bath freezer with pivoted conveyor belt
US4955209A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Nov 1, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D3/11
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A cryogenic freezer having an insulated cabinet forming an interior vessel with a bottom and sloping sides. A shallow liquid nitrogen bath is maintained in the vessel at a predetermined level. A conveyor assembly having a medial portion shaped to conform to the profile of the vessel is pivotally mounted at one end so that the medial portion is submerged in liquid nitrogen. An endless conveyor belt is mounted on the conveyor assembly by means of support rollers and guides to maintain a tensioned relationship. A jack is provided on the conveyor assembly to rotate the assembly about its pivot. An exhaust system is connected to the cabinet to remove evolved nitrogen gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.